| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Ville Syrjälä | 23585 | 54.59% | 324 | 42.74% |
| Eugeni Dodonov | 2949 | 6.83% | 7 | 0.92% |
| Jani Nikula | 2699 | 6.25% | 28 | 3.69% |
| Matt Roper | 2394 | 5.54% | 48 | 6.33% |
| Stanislav Lisovskiy | 2310 | 5.35% | 22 | 2.90% |
| Vandita Kulkarni | 1134 | 2.62% | 3 | 0.40% |
| Kumar, Mahesh | 930 | 2.15% | 27 | 3.56% |
| Paulo Zanoni | 755 | 1.75% | 36 | 4.75% |
| Maarten Lankhorst | 726 | 1.68% | 29 | 3.83% |
| Stephen Chandler Paul | 693 | 1.60% | 9 | 1.19% |
| Imre Deak | 674 | 1.56% | 17 | 2.24% |
| Pradeep Bhat | 487 | 1.13% | 4 | 0.53% |
| Daniel Vetter | 469 | 1.09% | 14 | 1.85% |
| Dave Airlie | 454 | 1.05% | 8 | 1.06% |
| José Roberto de Souza | 372 | 0.86% | 9 | 1.19% |
| Wambui Karuga | 370 | 0.86% | 1 | 0.13% |
| Tvrtko A. Ursulin | 272 | 0.63% | 20 | 2.64% |
| Damien Lespiau | 259 | 0.60% | 29 | 3.83% |
| Chris Wilson | 196 | 0.45% | 19 | 2.51% |
| Stuart Summers | 189 | 0.44% | 3 | 0.40% |
| Pankaj Bharadiya | 158 | 0.37% | 2 | 0.26% |
| Lucas De Marchi | 150 | 0.35% | 11 | 1.45% |
| Rodrigo Vivi | 143 | 0.33% | 13 | 1.72% |
| Mika Kuoppala | 130 | 0.30% | 9 | 1.19% |
| Ben Widawsky | 92 | 0.21% | 12 | 1.58% |
| James Ausmus | 81 | 0.19% | 2 | 0.26% |
| Vandana Kannan | 73 | 0.17% | 2 | 0.26% |
| Jesse Barnes | 59 | 0.14% | 7 | 0.92% |
| Gajanan Bhat | 54 | 0.12% | 3 | 0.40% |
| Ander Conselvan de Oliveira | 52 | 0.12% | 3 | 0.40% |
| Oscar Mateo | 43 | 0.10% | 3 | 0.40% |
| Vinod Govindapillai | 24 | 0.06% | 1 | 0.13% |
| Clint Taylor | 22 | 0.05% | 1 | 0.13% |
| Matt Atwood | 20 | 0.05% | 2 | 0.26% |
| Radhakrishna Sripada | 19 | 0.04% | 1 | 0.13% |
| Deepak S | 17 | 0.04% | 1 | 0.13% |
| Ashutosh Dixit | 15 | 0.03% | 1 | 0.13% |
| Chandra Konduru | 14 | 0.03% | 1 | 0.13% |
| Takashi Iwai | 13 | 0.03% | 1 | 0.13% |
| Kees Cook | 12 | 0.03% | 1 | 0.13% |
| Robert Bragg | 11 | 0.03% | 1 | 0.13% |
| Uma Shankar | 10 | 0.02% | 1 | 0.13% |
| Nick Hoath | 10 | 0.02% | 1 | 0.13% |
| Akash Goel | 9 | 0.02% | 2 | 0.26% |
| Juha-Pekka Heikkila | 7 | 0.02% | 1 | 0.13% |
| Sam Ravnborg | 7 | 0.02% | 1 | 0.13% |
| Nathan Chancellor | 6 | 0.01% | 1 | 0.13% |
| Michel Thierry | 5 | 0.01% | 1 | 0.13% |
| Wayne Boyer | 4 | 0.01% | 1 | 0.13% |
| Chia-I Wu | 4 | 0.01% | 1 | 0.13% |
| Francisco Jerez | 4 | 0.01% | 1 | 0.13% |
| Daisy Sun | 3 | 0.01% | 1 | 0.13% |
| Andi Shyti | 3 | 0.01% | 1 | 0.13% |
| Harish Chegondi | 2 | 0.00% | 1 | 0.13% |
| Manasi D Navare | 2 | 0.00% | 1 | 0.13% |
| Mika Kahola | 2 | 0.00% | 1 | 0.13% |
| Sagar Arun Kamble | 2 | 0.00% | 1 | 0.13% |
| Swathi Dhanavanthri | 1 | 0.00% | 1 | 0.13% |
| Linus Torvalds | 1 | 0.00% | 1 | 0.13% |
| Aditya Swarup | 1 | 0.00% | 1 | 0.13% |
| Thomas Daniel | 1 | 0.00% | 1 | 0.13% |
| Gustavo A. R. Silva | 1 | 0.00% | 1 | 0.13% |
| Sultan Alsawaf | 1 | 0.00% | 1 | 0.13% |
| Total | 43205 | 758 |
/* * Copyright © 2012 Intel Corporation * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS * IN THE SOFTWARE. * * Authors: * Eugeni Dodonov <eugeni.dodonov@intel.com> * */ #include <linux/module.h> #include <linux/string_helpers.h> #include <linux/pm_runtime.h> #include <drm/drm_atomic_helper.h> #include <drm/drm_blend.h> #include <drm/drm_fourcc.h> #include <drm/drm_plane_helper.h> #include "display/intel_atomic.h" #include "display/intel_atomic_plane.h" #include "display/intel_bw.h" #include "display/intel_de.h" #include "display/intel_display_trace.h" #include "display/intel_display_types.h" #include "display/intel_fb.h" #include "display/intel_fbc.h" #include "display/intel_sprite.h" #include "display/skl_universal_plane.h" #include "gt/intel_engine_regs.h" #include "gt/intel_gt_regs.h" #include "gt/intel_llc.h" #include "i915_drv.h" #include "i915_fixed.h" #include "i915_irq.h" #include "intel_mchbar_regs.h" #include "intel_pcode.h" #include "intel_pm.h" #include "vlv_sideband.h" #include "../../../platform/x86/intel_ips.h" static void skl_sagv_disable(struct drm_i915_private *dev_priv); struct drm_i915_clock_gating_funcs { void (*init_clock_gating)(struct drm_i915_private *i915); }; /* Stores plane specific WM parameters */ struct skl_wm_params { bool x_tiled, y_tiled; bool rc_surface; bool is_planar; u32 width; u8 cpp; u32 plane_pixel_rate; u32 y_min_scanlines; u32 plane_bytes_per_line; uint_fixed_16_16_t plane_blocks_per_line; uint_fixed_16_16_t y_tile_minimum; u32 linetime_us; u32 dbuf_block_size; }; /* used in computing the new watermarks state */ struct intel_wm_config { unsigned int num_pipes_active; bool sprites_enabled; bool sprites_scaled; }; static void gen9_init_clock_gating(struct drm_i915_private *dev_priv) { if (HAS_LLC(dev_priv)) { /* * WaCompressedResourceDisplayNewHashMode:skl,kbl * Display WA #0390: skl,kbl * * Must match Sampler, Pixel Back End, and Media. See * WaCompressedResourceSamplerPbeMediaNewHashMode. */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PAR1_1, intel_uncore_read(&dev_priv->uncore, CHICKEN_PAR1_1) | SKL_DE_COMPRESSED_HASH_MODE); } /* See Bspec note for PSR2_CTL bit 31, Wa#828:skl,bxt,kbl,cfl */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PAR1_1, intel_uncore_read(&dev_priv->uncore, CHICKEN_PAR1_1) | SKL_EDP_PSR_FIX_RDWRAP); /* WaEnableChickenDCPR:skl,bxt,kbl,glk,cfl */ intel_uncore_write(&dev_priv->uncore, GEN8_CHICKEN_DCPR_1, intel_uncore_read(&dev_priv->uncore, GEN8_CHICKEN_DCPR_1) | MASK_WAKEMEM); /* * WaFbcWakeMemOn:skl,bxt,kbl,glk,cfl * Display WA #0859: skl,bxt,kbl,glk,cfl */ intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) | DISP_FBC_MEMORY_WAKE); } static void bxt_init_clock_gating(struct drm_i915_private *dev_priv) { gen9_init_clock_gating(dev_priv); /* WaDisableSDEUnitClockGating:bxt */ intel_uncore_write(&dev_priv->uncore, GEN8_UCGCTL6, intel_uncore_read(&dev_priv->uncore, GEN8_UCGCTL6) | GEN8_SDEUNIT_CLOCK_GATE_DISABLE); /* * FIXME: * GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ applies on 3x6 GT SKUs only. */ intel_uncore_write(&dev_priv->uncore, GEN8_UCGCTL6, intel_uncore_read(&dev_priv->uncore, GEN8_UCGCTL6) | GEN8_HDCUNIT_CLOCK_GATE_DISABLE_HDCREQ); /* * Wa: Backlight PWM may stop in the asserted state, causing backlight * to stay fully on. */ intel_uncore_write(&dev_priv->uncore, GEN9_CLKGATE_DIS_0, intel_uncore_read(&dev_priv->uncore, GEN9_CLKGATE_DIS_0) | PWM1_GATING_DIS | PWM2_GATING_DIS); /* * Lower the display internal timeout. * This is needed to avoid any hard hangs when DSI port PLL * is off and a MMIO access is attempted by any privilege * application, using batch buffers or any other means. */ intel_uncore_write(&dev_priv->uncore, RM_TIMEOUT, MMIO_TIMEOUT_US(950)); /* * WaFbcTurnOffFbcWatermark:bxt * Display WA #0562: bxt */ intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) | DISP_FBC_WM_DIS); /* * WaFbcHighMemBwCorruptionAvoidance:bxt * Display WA #0883: bxt */ intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), intel_uncore_read(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A)) | DPFC_DISABLE_DUMMY0); } static void glk_init_clock_gating(struct drm_i915_private *dev_priv) { gen9_init_clock_gating(dev_priv); /* * WaDisablePWMClockGating:glk * Backlight PWM may stop in the asserted state, causing backlight * to stay fully on. */ intel_uncore_write(&dev_priv->uncore, GEN9_CLKGATE_DIS_0, intel_uncore_read(&dev_priv->uncore, GEN9_CLKGATE_DIS_0) | PWM1_GATING_DIS | PWM2_GATING_DIS); } static void pnv_get_mem_freq(struct drm_i915_private *dev_priv) { u32 tmp; tmp = intel_uncore_read(&dev_priv->uncore, CLKCFG); switch (tmp & CLKCFG_FSB_MASK) { case CLKCFG_FSB_533: dev_priv->fsb_freq = 533; /* 133*4 */ break; case CLKCFG_FSB_800: dev_priv->fsb_freq = 800; /* 200*4 */ break; case CLKCFG_FSB_667: dev_priv->fsb_freq = 667; /* 167*4 */ break; case CLKCFG_FSB_400: dev_priv->fsb_freq = 400; /* 100*4 */ break; } switch (tmp & CLKCFG_MEM_MASK) { case CLKCFG_MEM_533: dev_priv->mem_freq = 533; break; case CLKCFG_MEM_667: dev_priv->mem_freq = 667; break; case CLKCFG_MEM_800: dev_priv->mem_freq = 800; break; } /* detect pineview DDR3 setting */ tmp = intel_uncore_read(&dev_priv->uncore, CSHRDDR3CTL); dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0; } static void ilk_get_mem_freq(struct drm_i915_private *dev_priv) { u16 ddrpll, csipll; ddrpll = intel_uncore_read16(&dev_priv->uncore, DDRMPLL1); csipll = intel_uncore_read16(&dev_priv->uncore, CSIPLL0); switch (ddrpll & 0xff) { case 0xc: dev_priv->mem_freq = 800; break; case 0x10: dev_priv->mem_freq = 1066; break; case 0x14: dev_priv->mem_freq = 1333; break; case 0x18: dev_priv->mem_freq = 1600; break; default: drm_dbg(&dev_priv->drm, "unknown memory frequency 0x%02x\n", ddrpll & 0xff); dev_priv->mem_freq = 0; break; } switch (csipll & 0x3ff) { case 0x00c: dev_priv->fsb_freq = 3200; break; case 0x00e: dev_priv->fsb_freq = 3733; break; case 0x010: dev_priv->fsb_freq = 4266; break; case 0x012: dev_priv->fsb_freq = 4800; break; case 0x014: dev_priv->fsb_freq = 5333; break; case 0x016: dev_priv->fsb_freq = 5866; break; case 0x018: dev_priv->fsb_freq = 6400; break; default: drm_dbg(&dev_priv->drm, "unknown fsb frequency 0x%04x\n", csipll & 0x3ff); dev_priv->fsb_freq = 0; break; } } static const struct cxsr_latency cxsr_latency_table[] = { {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */ {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */ {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */ {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */ {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */ {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */ {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */ {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */ {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */ {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */ {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */ {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */ {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */ {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */ {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */ {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */ {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */ {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */ {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */ {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */ {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */ {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */ {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */ {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */ {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */ {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */ {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */ {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */ {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */ {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */ }; static const struct cxsr_latency *intel_get_cxsr_latency(bool is_desktop, bool is_ddr3, int fsb, int mem) { const struct cxsr_latency *latency; int i; if (fsb == 0 || mem == 0) return NULL; for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) { latency = &cxsr_latency_table[i]; if (is_desktop == latency->is_desktop && is_ddr3 == latency->is_ddr3 && fsb == latency->fsb_freq && mem == latency->mem_freq) return latency; } DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n"); return NULL; } static void chv_set_memory_dvfs(struct drm_i915_private *dev_priv, bool enable) { u32 val; vlv_punit_get(dev_priv); val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2); if (enable) val &= ~FORCE_DDR_HIGH_FREQ; else val |= FORCE_DDR_HIGH_FREQ; val &= ~FORCE_DDR_LOW_FREQ; val |= FORCE_DDR_FREQ_REQ_ACK; vlv_punit_write(dev_priv, PUNIT_REG_DDR_SETUP2, val); if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2) & FORCE_DDR_FREQ_REQ_ACK) == 0, 3)) drm_err(&dev_priv->drm, "timed out waiting for Punit DDR DVFS request\n"); vlv_punit_put(dev_priv); } static void chv_set_memory_pm5(struct drm_i915_private *dev_priv, bool enable) { u32 val; vlv_punit_get(dev_priv); val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM); if (enable) val |= DSP_MAXFIFO_PM5_ENABLE; else val &= ~DSP_MAXFIFO_PM5_ENABLE; vlv_punit_write(dev_priv, PUNIT_REG_DSPSSPM, val); vlv_punit_put(dev_priv); } #define FW_WM(value, plane) \ (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK) static bool _intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) { bool was_enabled; u32 val; if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { was_enabled = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF_VLV) & FW_CSPWRDWNEN; intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF_VLV, enable ? FW_CSPWRDWNEN : 0); intel_uncore_posting_read(&dev_priv->uncore, FW_BLC_SELF_VLV); } else if (IS_G4X(dev_priv) || IS_I965GM(dev_priv)) { was_enabled = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF) & FW_BLC_SELF_EN; intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, enable ? FW_BLC_SELF_EN : 0); intel_uncore_posting_read(&dev_priv->uncore, FW_BLC_SELF); } else if (IS_PINEVIEW(dev_priv)) { val = intel_uncore_read(&dev_priv->uncore, DSPFW3); was_enabled = val & PINEVIEW_SELF_REFRESH_EN; if (enable) val |= PINEVIEW_SELF_REFRESH_EN; else val &= ~PINEVIEW_SELF_REFRESH_EN; intel_uncore_write(&dev_priv->uncore, DSPFW3, val); intel_uncore_posting_read(&dev_priv->uncore, DSPFW3); } else if (IS_I945G(dev_priv) || IS_I945GM(dev_priv)) { was_enabled = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF) & FW_BLC_SELF_EN; val = enable ? _MASKED_BIT_ENABLE(FW_BLC_SELF_EN) : _MASKED_BIT_DISABLE(FW_BLC_SELF_EN); intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, val); intel_uncore_posting_read(&dev_priv->uncore, FW_BLC_SELF); } else if (IS_I915GM(dev_priv)) { /* * FIXME can't find a bit like this for 915G, and * and yet it does have the related watermark in * FW_BLC_SELF. What's going on? */ was_enabled = intel_uncore_read(&dev_priv->uncore, INSTPM) & INSTPM_SELF_EN; val = enable ? _MASKED_BIT_ENABLE(INSTPM_SELF_EN) : _MASKED_BIT_DISABLE(INSTPM_SELF_EN); intel_uncore_write(&dev_priv->uncore, INSTPM, val); intel_uncore_posting_read(&dev_priv->uncore, INSTPM); } else { return false; } trace_intel_memory_cxsr(dev_priv, was_enabled, enable); drm_dbg_kms(&dev_priv->drm, "memory self-refresh is %s (was %s)\n", str_enabled_disabled(enable), str_enabled_disabled(was_enabled)); return was_enabled; } /** * intel_set_memory_cxsr - Configure CxSR state * @dev_priv: i915 device * @enable: Allow vs. disallow CxSR * * Allow or disallow the system to enter a special CxSR * (C-state self refresh) state. What typically happens in CxSR mode * is that several display FIFOs may get combined into a single larger * FIFO for a particular plane (so called max FIFO mode) to allow the * system to defer memory fetches longer, and the memory will enter * self refresh. * * Note that enabling CxSR does not guarantee that the system enter * this special mode, nor does it guarantee that the system stays * in that mode once entered. So this just allows/disallows the system * to autonomously utilize the CxSR mode. Other factors such as core * C-states will affect when/if the system actually enters/exits the * CxSR mode. * * Note that on VLV/CHV this actually only controls the max FIFO mode, * and the system is free to enter/exit memory self refresh at any time * even when the use of CxSR has been disallowed. * * While the system is actually in the CxSR/max FIFO mode, some plane * control registers will not get latched on vblank. Thus in order to * guarantee the system will respond to changes in the plane registers * we must always disallow CxSR prior to making changes to those registers. * Unfortunately the system will re-evaluate the CxSR conditions at * frame start which happens after vblank start (which is when the plane * registers would get latched), so we can't proceed with the plane update * during the same frame where we disallowed CxSR. * * Certain platforms also have a deeper HPLL SR mode. Fortunately the * HPLL SR mode depends on CxSR itself, so we don't have to hand hold * the hardware w.r.t. HPLL SR when writing to plane registers. * Disallowing just CxSR is sufficient. */ bool intel_set_memory_cxsr(struct drm_i915_private *dev_priv, bool enable) { bool ret; mutex_lock(&dev_priv->wm.wm_mutex); ret = _intel_set_memory_cxsr(dev_priv, enable); if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) dev_priv->wm.vlv.cxsr = enable; else if (IS_G4X(dev_priv)) dev_priv->wm.g4x.cxsr = enable; mutex_unlock(&dev_priv->wm.wm_mutex); return ret; } /* * Latency for FIFO fetches is dependent on several factors: * - memory configuration (speed, channels) * - chipset * - current MCH state * It can be fairly high in some situations, so here we assume a fairly * pessimal value. It's a tradeoff between extra memory fetches (if we * set this value too high, the FIFO will fetch frequently to stay full) * and power consumption (set it too low to save power and we might see * FIFO underruns and display "flicker"). * * A value of 5us seems to be a good balance; safe for very low end * platforms but not overly aggressive on lower latency configs. */ static const int pessimal_latency_ns = 5000; #define VLV_FIFO_START(dsparb, dsparb2, lo_shift, hi_shift) \ ((((dsparb) >> (lo_shift)) & 0xff) | ((((dsparb2) >> (hi_shift)) & 0x1) << 8)) static void vlv_get_fifo_size(struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; enum pipe pipe = crtc->pipe; int sprite0_start, sprite1_start; u32 dsparb, dsparb2, dsparb3; switch (pipe) { case PIPE_A: dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB); dsparb2 = intel_uncore_read(&dev_priv->uncore, DSPARB2); sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 0, 0); sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 8, 4); break; case PIPE_B: dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB); dsparb2 = intel_uncore_read(&dev_priv->uncore, DSPARB2); sprite0_start = VLV_FIFO_START(dsparb, dsparb2, 16, 8); sprite1_start = VLV_FIFO_START(dsparb, dsparb2, 24, 12); break; case PIPE_C: dsparb2 = intel_uncore_read(&dev_priv->uncore, DSPARB2); dsparb3 = intel_uncore_read(&dev_priv->uncore, DSPARB3); sprite0_start = VLV_FIFO_START(dsparb3, dsparb2, 0, 16); sprite1_start = VLV_FIFO_START(dsparb3, dsparb2, 8, 20); break; default: MISSING_CASE(pipe); return; } fifo_state->plane[PLANE_PRIMARY] = sprite0_start; fifo_state->plane[PLANE_SPRITE0] = sprite1_start - sprite0_start; fifo_state->plane[PLANE_SPRITE1] = 511 - sprite1_start; fifo_state->plane[PLANE_CURSOR] = 63; } static int i9xx_get_fifo_size(struct drm_i915_private *dev_priv, enum i9xx_plane_id i9xx_plane) { u32 dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB); int size; size = dsparb & 0x7f; if (i9xx_plane == PLANE_B) size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size; drm_dbg_kms(&dev_priv->drm, "FIFO size - (0x%08x) %c: %d\n", dsparb, plane_name(i9xx_plane), size); return size; } static int i830_get_fifo_size(struct drm_i915_private *dev_priv, enum i9xx_plane_id i9xx_plane) { u32 dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB); int size; size = dsparb & 0x1ff; if (i9xx_plane == PLANE_B) size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size; size >>= 1; /* Convert to cachelines */ drm_dbg_kms(&dev_priv->drm, "FIFO size - (0x%08x) %c: %d\n", dsparb, plane_name(i9xx_plane), size); return size; } static int i845_get_fifo_size(struct drm_i915_private *dev_priv, enum i9xx_plane_id i9xx_plane) { u32 dsparb = intel_uncore_read(&dev_priv->uncore, DSPARB); int size; size = dsparb & 0x7f; size >>= 2; /* Convert to cachelines */ drm_dbg_kms(&dev_priv->drm, "FIFO size - (0x%08x) %c: %d\n", dsparb, plane_name(i9xx_plane), size); return size; } /* Pineview has different values for various configs */ static const struct intel_watermark_params pnv_display_wm = { .fifo_size = PINEVIEW_DISPLAY_FIFO, .max_wm = PINEVIEW_MAX_WM, .default_wm = PINEVIEW_DFT_WM, .guard_size = PINEVIEW_GUARD_WM, .cacheline_size = PINEVIEW_FIFO_LINE_SIZE, }; static const struct intel_watermark_params pnv_display_hplloff_wm = { .fifo_size = PINEVIEW_DISPLAY_FIFO, .max_wm = PINEVIEW_MAX_WM, .default_wm = PINEVIEW_DFT_HPLLOFF_WM, .guard_size = PINEVIEW_GUARD_WM, .cacheline_size = PINEVIEW_FIFO_LINE_SIZE, }; static const struct intel_watermark_params pnv_cursor_wm = { .fifo_size = PINEVIEW_CURSOR_FIFO, .max_wm = PINEVIEW_CURSOR_MAX_WM, .default_wm = PINEVIEW_CURSOR_DFT_WM, .guard_size = PINEVIEW_CURSOR_GUARD_WM, .cacheline_size = PINEVIEW_FIFO_LINE_SIZE, }; static const struct intel_watermark_params pnv_cursor_hplloff_wm = { .fifo_size = PINEVIEW_CURSOR_FIFO, .max_wm = PINEVIEW_CURSOR_MAX_WM, .default_wm = PINEVIEW_CURSOR_DFT_WM, .guard_size = PINEVIEW_CURSOR_GUARD_WM, .cacheline_size = PINEVIEW_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i965_cursor_wm_info = { .fifo_size = I965_CURSOR_FIFO, .max_wm = I965_CURSOR_MAX_WM, .default_wm = I965_CURSOR_DFT_WM, .guard_size = 2, .cacheline_size = I915_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i945_wm_info = { .fifo_size = I945_FIFO_SIZE, .max_wm = I915_MAX_WM, .default_wm = 1, .guard_size = 2, .cacheline_size = I915_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i915_wm_info = { .fifo_size = I915_FIFO_SIZE, .max_wm = I915_MAX_WM, .default_wm = 1, .guard_size = 2, .cacheline_size = I915_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i830_a_wm_info = { .fifo_size = I855GM_FIFO_SIZE, .max_wm = I915_MAX_WM, .default_wm = 1, .guard_size = 2, .cacheline_size = I830_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i830_bc_wm_info = { .fifo_size = I855GM_FIFO_SIZE, .max_wm = I915_MAX_WM/2, .default_wm = 1, .guard_size = 2, .cacheline_size = I830_FIFO_LINE_SIZE, }; static const struct intel_watermark_params i845_wm_info = { .fifo_size = I830_FIFO_SIZE, .max_wm = I915_MAX_WM, .default_wm = 1, .guard_size = 2, .cacheline_size = I830_FIFO_LINE_SIZE, }; /** * intel_wm_method1 - Method 1 / "small buffer" watermark formula * @pixel_rate: Pipe pixel rate in kHz * @cpp: Plane bytes per pixel * @latency: Memory wakeup latency in 0.1us units * * Compute the watermark using the method 1 or "small buffer" * formula. The caller may additonally add extra cachelines * to account for TLB misses and clock crossings. * * This method is concerned with the short term drain rate * of the FIFO, ie. it does not account for blanking periods * which would effectively reduce the average drain rate across * a longer period. The name "small" refers to the fact the * FIFO is relatively small compared to the amount of data * fetched. * * The FIFO level vs. time graph might look something like: * * |\ |\ * | \ | \ * __---__---__ (- plane active, _ blanking) * -> time * * or perhaps like this: * * |\|\ |\|\ * __----__----__ (- plane active, _ blanking) * -> time * * Returns: * The watermark in bytes */ static unsigned int intel_wm_method1(unsigned int pixel_rate, unsigned int cpp, unsigned int latency) { u64 ret; ret = mul_u32_u32(pixel_rate, cpp * latency); ret = DIV_ROUND_UP_ULL(ret, 10000); return ret; } /** * intel_wm_method2 - Method 2 / "large buffer" watermark formula * @pixel_rate: Pipe pixel rate in kHz * @htotal: Pipe horizontal total * @width: Plane width in pixels * @cpp: Plane bytes per pixel * @latency: Memory wakeup latency in 0.1us units * * Compute the watermark using the method 2 or "large buffer" * formula. The caller may additonally add extra cachelines * to account for TLB misses and clock crossings. * * This method is concerned with the long term drain rate * of the FIFO, ie. it does account for blanking periods * which effectively reduce the average drain rate across * a longer period. The name "large" refers to the fact the * FIFO is relatively large compared to the amount of data * fetched. * * The FIFO level vs. time graph might look something like: * * |\___ |\___ * | \___ | \___ * | \ | \ * __ --__--__--__--__--__--__ (- plane active, _ blanking) * -> time * * Returns: * The watermark in bytes */ static unsigned int intel_wm_method2(unsigned int pixel_rate, unsigned int htotal, unsigned int width, unsigned int cpp, unsigned int latency) { unsigned int ret; /* * FIXME remove once all users are computing * watermarks in the correct place. */ if (WARN_ON_ONCE(htotal == 0)) htotal = 1; ret = (latency * pixel_rate) / (htotal * 10000); ret = (ret + 1) * width * cpp; return ret; } /** * intel_calculate_wm - calculate watermark level * @pixel_rate: pixel clock * @wm: chip FIFO params * @fifo_size: size of the FIFO buffer * @cpp: bytes per pixel * @latency_ns: memory latency for the platform * * Calculate the watermark level (the level at which the display plane will * start fetching from memory again). Each chip has a different display * FIFO size and allocation, so the caller needs to figure that out and pass * in the correct intel_watermark_params structure. * * As the pixel clock runs, the FIFO will be drained at a rate that depends * on the pixel size. When it reaches the watermark level, it'll start * fetching FIFO line sized based chunks from memory until the FIFO fills * past the watermark point. If the FIFO drains completely, a FIFO underrun * will occur, and a display engine hang could result. */ static unsigned int intel_calculate_wm(int pixel_rate, const struct intel_watermark_params *wm, int fifo_size, int cpp, unsigned int latency_ns) { int entries, wm_size; /* * Note: we need to make sure we don't overflow for various clock & * latency values. * clocks go from a few thousand to several hundred thousand. * latency is usually a few thousand */ entries = intel_wm_method1(pixel_rate, cpp, latency_ns / 100); entries = DIV_ROUND_UP(entries, wm->cacheline_size) + wm->guard_size; DRM_DEBUG_KMS("FIFO entries required for mode: %d\n", entries); wm_size = fifo_size - entries; DRM_DEBUG_KMS("FIFO watermark level: %d\n", wm_size); /* Don't promote wm_size to unsigned... */ if (wm_size > wm->max_wm) wm_size = wm->max_wm; if (wm_size <= 0) wm_size = wm->default_wm; /* * Bspec seems to indicate that the value shouldn't be lower than * 'burst size + 1'. Certainly 830 is quite unhappy with low values. * Lets go for 8 which is the burst size since certain platforms * already use a hardcoded 8 (which is what the spec says should be * done). */ if (wm_size <= 8) wm_size = 8; return wm_size; } static bool is_disabling(int old, int new, int threshold) { return old >= threshold && new < threshold; } static bool is_enabling(int old, int new, int threshold) { return old < threshold && new >= threshold; } static int intel_wm_num_levels(struct drm_i915_private *dev_priv) { return dev_priv->wm.max_level + 1; } static bool intel_wm_plane_visible(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); /* FIXME check the 'enable' instead */ if (!crtc_state->hw.active) return false; /* * Treat cursor with fb as always visible since cursor updates * can happen faster than the vrefresh rate, and the current * watermark code doesn't handle that correctly. Cursor updates * which set/clear the fb or change the cursor size are going * to get throttled by intel_legacy_cursor_update() to work * around this problem with the watermark code. */ if (plane->id == PLANE_CURSOR) return plane_state->hw.fb != NULL; else return plane_state->uapi.visible; } static bool intel_crtc_active(struct intel_crtc *crtc) { /* Be paranoid as we can arrive here with only partial * state retrieved from the hardware during setup. * * We can ditch the adjusted_mode.crtc_clock check as soon * as Haswell has gained clock readout/fastboot support. * * We can ditch the crtc->primary->state->fb check as soon as we can * properly reconstruct framebuffers. * * FIXME: The intel_crtc->active here should be switched to * crtc->state->active once we have proper CRTC states wired up * for atomic. */ return crtc && crtc->active && crtc->base.primary->state->fb && crtc->config->hw.adjusted_mode.crtc_clock; } static struct intel_crtc *single_enabled_crtc(struct drm_i915_private *dev_priv) { struct intel_crtc *crtc, *enabled = NULL; for_each_intel_crtc(&dev_priv->drm, crtc) { if (intel_crtc_active(crtc)) { if (enabled) return NULL; enabled = crtc; } } return enabled; } static void pnv_update_wm(struct drm_i915_private *dev_priv) { struct intel_crtc *crtc; const struct cxsr_latency *latency; u32 reg; unsigned int wm; latency = intel_get_cxsr_latency(!IS_MOBILE(dev_priv), dev_priv->is_ddr3, dev_priv->fsb_freq, dev_priv->mem_freq); if (!latency) { drm_dbg_kms(&dev_priv->drm, "Unknown FSB/MEM found, disable CxSR\n"); intel_set_memory_cxsr(dev_priv, false); return; } crtc = single_enabled_crtc(dev_priv); if (crtc) { const struct drm_framebuffer *fb = crtc->base.primary->state->fb; int pixel_rate = crtc->config->pixel_rate; int cpp = fb->format->cpp[0]; /* Display SR */ wm = intel_calculate_wm(pixel_rate, &pnv_display_wm, pnv_display_wm.fifo_size, cpp, latency->display_sr); reg = intel_uncore_read(&dev_priv->uncore, DSPFW1); reg &= ~DSPFW_SR_MASK; reg |= FW_WM(wm, SR); intel_uncore_write(&dev_priv->uncore, DSPFW1, reg); drm_dbg_kms(&dev_priv->drm, "DSPFW1 register is %x\n", reg); /* cursor SR */ wm = intel_calculate_wm(pixel_rate, &pnv_cursor_wm, pnv_display_wm.fifo_size, 4, latency->cursor_sr); reg = intel_uncore_read(&dev_priv->uncore, DSPFW3); reg &= ~DSPFW_CURSOR_SR_MASK; reg |= FW_WM(wm, CURSOR_SR); intel_uncore_write(&dev_priv->uncore, DSPFW3, reg); /* Display HPLL off SR */ wm = intel_calculate_wm(pixel_rate, &pnv_display_hplloff_wm, pnv_display_hplloff_wm.fifo_size, cpp, latency->display_hpll_disable); reg = intel_uncore_read(&dev_priv->uncore, DSPFW3); reg &= ~DSPFW_HPLL_SR_MASK; reg |= FW_WM(wm, HPLL_SR); intel_uncore_write(&dev_priv->uncore, DSPFW3, reg); /* cursor HPLL off SR */ wm = intel_calculate_wm(pixel_rate, &pnv_cursor_hplloff_wm, pnv_display_hplloff_wm.fifo_size, 4, latency->cursor_hpll_disable); reg = intel_uncore_read(&dev_priv->uncore, DSPFW3); reg &= ~DSPFW_HPLL_CURSOR_MASK; reg |= FW_WM(wm, HPLL_CURSOR); intel_uncore_write(&dev_priv->uncore, DSPFW3, reg); drm_dbg_kms(&dev_priv->drm, "DSPFW3 register is %x\n", reg); intel_set_memory_cxsr(dev_priv, true); } else { intel_set_memory_cxsr(dev_priv, false); } } /* * Documentation says: * "If the line size is small, the TLB fetches can get in the way of the * data fetches, causing some lag in the pixel data return which is not * accounted for in the above formulas. The following adjustment only * needs to be applied if eight whole lines fit in the buffer at once. * The WM is adjusted upwards by the difference between the FIFO size * and the size of 8 whole lines. This adjustment is always performed * in the actual pixel depth regardless of whether FBC is enabled or not." */ static unsigned int g4x_tlb_miss_wa(int fifo_size, int width, int cpp) { int tlb_miss = fifo_size * 64 - width * cpp * 8; return max(0, tlb_miss); } static void g4x_write_wm_values(struct drm_i915_private *dev_priv, const struct g4x_wm_values *wm) { enum pipe pipe; for_each_pipe(dev_priv, pipe) trace_g4x_wm(intel_crtc_for_pipe(dev_priv, pipe), wm); intel_uncore_write(&dev_priv->uncore, DSPFW1, FW_WM(wm->sr.plane, SR) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_CURSOR], CURSORB) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY], PLANEB) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY], PLANEA)); intel_uncore_write(&dev_priv->uncore, DSPFW2, (wm->fbc_en ? DSPFW_FBC_SR_EN : 0) | FW_WM(wm->sr.fbc, FBC_SR) | FW_WM(wm->hpll.fbc, FBC_HPLL_SR) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEB) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_CURSOR], CURSORA) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0], SPRITEA)); intel_uncore_write(&dev_priv->uncore, DSPFW3, (wm->hpll_en ? DSPFW_HPLL_SR_EN : 0) | FW_WM(wm->sr.cursor, CURSOR_SR) | FW_WM(wm->hpll.cursor, HPLL_CURSOR) | FW_WM(wm->hpll.plane, HPLL_SR)); intel_uncore_posting_read(&dev_priv->uncore, DSPFW1); } #define FW_WM_VLV(value, plane) \ (((value) << DSPFW_ ## plane ## _SHIFT) & DSPFW_ ## plane ## _MASK_VLV) static void vlv_write_wm_values(struct drm_i915_private *dev_priv, const struct vlv_wm_values *wm) { enum pipe pipe; for_each_pipe(dev_priv, pipe) { trace_vlv_wm(intel_crtc_for_pipe(dev_priv, pipe), wm); intel_uncore_write(&dev_priv->uncore, VLV_DDL(pipe), (wm->ddl[pipe].plane[PLANE_CURSOR] << DDL_CURSOR_SHIFT) | (wm->ddl[pipe].plane[PLANE_SPRITE1] << DDL_SPRITE_SHIFT(1)) | (wm->ddl[pipe].plane[PLANE_SPRITE0] << DDL_SPRITE_SHIFT(0)) | (wm->ddl[pipe].plane[PLANE_PRIMARY] << DDL_PLANE_SHIFT)); } /* * Zero the (unused) WM1 watermarks, and also clear all the * high order bits so that there are no out of bounds values * present in the registers during the reprogramming. */ intel_uncore_write(&dev_priv->uncore, DSPHOWM, 0); intel_uncore_write(&dev_priv->uncore, DSPHOWM1, 0); intel_uncore_write(&dev_priv->uncore, DSPFW4, 0); intel_uncore_write(&dev_priv->uncore, DSPFW5, 0); intel_uncore_write(&dev_priv->uncore, DSPFW6, 0); intel_uncore_write(&dev_priv->uncore, DSPFW1, FW_WM(wm->sr.plane, SR) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_CURSOR], CURSORB) | FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_PRIMARY], PLANEB) | FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_PRIMARY], PLANEA)); intel_uncore_write(&dev_priv->uncore, DSPFW2, FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_SPRITE1], SPRITEB) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_CURSOR], CURSORA) | FW_WM_VLV(wm->pipe[PIPE_A].plane[PLANE_SPRITE0], SPRITEA)); intel_uncore_write(&dev_priv->uncore, DSPFW3, FW_WM(wm->sr.cursor, CURSOR_SR)); if (IS_CHERRYVIEW(dev_priv)) { intel_uncore_write(&dev_priv->uncore, DSPFW7_CHV, FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE1], SPRITED) | FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEC)); intel_uncore_write(&dev_priv->uncore, DSPFW8_CHV, FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_SPRITE1], SPRITEF) | FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_SPRITE0], SPRITEE)); intel_uncore_write(&dev_priv->uncore, DSPFW9_CHV, FW_WM_VLV(wm->pipe[PIPE_C].plane[PLANE_PRIMARY], PLANEC) | FW_WM(wm->pipe[PIPE_C].plane[PLANE_CURSOR], CURSORC)); intel_uncore_write(&dev_priv->uncore, DSPHOWM, FW_WM(wm->sr.plane >> 9, SR_HI) | FW_WM(wm->pipe[PIPE_C].plane[PLANE_SPRITE1] >> 8, SPRITEF_HI) | FW_WM(wm->pipe[PIPE_C].plane[PLANE_SPRITE0] >> 8, SPRITEE_HI) | FW_WM(wm->pipe[PIPE_C].plane[PLANE_PRIMARY] >> 8, PLANEC_HI) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE1] >> 8, SPRITED_HI) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0] >> 8, SPRITEC_HI) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY] >> 8, PLANEB_HI) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE1] >> 8, SPRITEB_HI) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0] >> 8, SPRITEA_HI) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY] >> 8, PLANEA_HI)); } else { intel_uncore_write(&dev_priv->uncore, DSPFW7, FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE1], SPRITED) | FW_WM_VLV(wm->pipe[PIPE_B].plane[PLANE_SPRITE0], SPRITEC)); intel_uncore_write(&dev_priv->uncore, DSPHOWM, FW_WM(wm->sr.plane >> 9, SR_HI) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE1] >> 8, SPRITED_HI) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_SPRITE0] >> 8, SPRITEC_HI) | FW_WM(wm->pipe[PIPE_B].plane[PLANE_PRIMARY] >> 8, PLANEB_HI) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE1] >> 8, SPRITEB_HI) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_SPRITE0] >> 8, SPRITEA_HI) | FW_WM(wm->pipe[PIPE_A].plane[PLANE_PRIMARY] >> 8, PLANEA_HI)); } intel_uncore_posting_read(&dev_priv->uncore, DSPFW1); } #undef FW_WM_VLV static void g4x_setup_wm_latency(struct drm_i915_private *dev_priv) { /* all latencies in usec */ dev_priv->wm.pri_latency[G4X_WM_LEVEL_NORMAL] = 5; dev_priv->wm.pri_latency[G4X_WM_LEVEL_SR] = 12; dev_priv->wm.pri_latency[G4X_WM_LEVEL_HPLL] = 35; dev_priv->wm.max_level = G4X_WM_LEVEL_HPLL; } static int g4x_plane_fifo_size(enum plane_id plane_id, int level) { /* * DSPCNTR[13] supposedly controls whether the * primary plane can use the FIFO space otherwise * reserved for the sprite plane. It's not 100% clear * what the actual FIFO size is, but it looks like we * can happily set both primary and sprite watermarks * up to 127 cachelines. So that would seem to mean * that either DSPCNTR[13] doesn't do anything, or that * the total FIFO is >= 256 cachelines in size. Either * way, we don't seem to have to worry about this * repartitioning as the maximum watermark value the * register can hold for each plane is lower than the * minimum FIFO size. */ switch (plane_id) { case PLANE_CURSOR: return 63; case PLANE_PRIMARY: return level == G4X_WM_LEVEL_NORMAL ? 127 : 511; case PLANE_SPRITE0: return level == G4X_WM_LEVEL_NORMAL ? 127 : 0; default: MISSING_CASE(plane_id); return 0; } } static int g4x_fbc_fifo_size(int level) { switch (level) { case G4X_WM_LEVEL_SR: return 7; case G4X_WM_LEVEL_HPLL: return 15; default: MISSING_CASE(level); return 0; } } static u16 g4x_compute_wm(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, int level) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); struct drm_i915_private *dev_priv = to_i915(plane->base.dev); const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode; unsigned int latency = dev_priv->wm.pri_latency[level] * 10; unsigned int pixel_rate, htotal, cpp, width, wm; if (latency == 0) return USHRT_MAX; if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; cpp = plane_state->hw.fb->format->cpp[0]; /* * WaUse32BppForSRWM:ctg,elk * * The spec fails to list this restriction for the * HPLL watermark, which seems a little strange. * Let's use 32bpp for the HPLL watermark as well. */ if (plane->id == PLANE_PRIMARY && level != G4X_WM_LEVEL_NORMAL) cpp = max(cpp, 4u); pixel_rate = crtc_state->pixel_rate; htotal = pipe_mode->crtc_htotal; width = drm_rect_width(&plane_state->uapi.src) >> 16; if (plane->id == PLANE_CURSOR) { wm = intel_wm_method2(pixel_rate, htotal, width, cpp, latency); } else if (plane->id == PLANE_PRIMARY && level == G4X_WM_LEVEL_NORMAL) { wm = intel_wm_method1(pixel_rate, cpp, latency); } else { unsigned int small, large; small = intel_wm_method1(pixel_rate, cpp, latency); large = intel_wm_method2(pixel_rate, htotal, width, cpp, latency); wm = min(small, large); } wm += g4x_tlb_miss_wa(g4x_plane_fifo_size(plane->id, level), width, cpp); wm = DIV_ROUND_UP(wm, 64) + 2; return min_t(unsigned int, wm, USHRT_MAX); } static bool g4x_raw_plane_wm_set(struct intel_crtc_state *crtc_state, int level, enum plane_id plane_id, u16 value) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); bool dirty = false; for (; level < intel_wm_num_levels(dev_priv); level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level]; dirty |= raw->plane[plane_id] != value; raw->plane[plane_id] = value; } return dirty; } static bool g4x_raw_fbc_wm_set(struct intel_crtc_state *crtc_state, int level, u16 value) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); bool dirty = false; /* NORMAL level doesn't have an FBC watermark */ level = max(level, G4X_WM_LEVEL_SR); for (; level < intel_wm_num_levels(dev_priv); level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level]; dirty |= raw->fbc != value; raw->fbc = value; } return dirty; } static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, u32 pri_val); static bool g4x_raw_plane_wm_compute(struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); int num_levels = intel_wm_num_levels(to_i915(plane->base.dev)); enum plane_id plane_id = plane->id; bool dirty = false; int level; if (!intel_wm_plane_visible(crtc_state, plane_state)) { dirty |= g4x_raw_plane_wm_set(crtc_state, 0, plane_id, 0); if (plane_id == PLANE_PRIMARY) dirty |= g4x_raw_fbc_wm_set(crtc_state, 0, 0); goto out; } for (level = 0; level < num_levels; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level]; int wm, max_wm; wm = g4x_compute_wm(crtc_state, plane_state, level); max_wm = g4x_plane_fifo_size(plane_id, level); if (wm > max_wm) break; dirty |= raw->plane[plane_id] != wm; raw->plane[plane_id] = wm; if (plane_id != PLANE_PRIMARY || level == G4X_WM_LEVEL_NORMAL) continue; wm = ilk_compute_fbc_wm(crtc_state, plane_state, raw->plane[plane_id]); max_wm = g4x_fbc_fifo_size(level); /* * FBC wm is not mandatory as we * can always just disable its use. */ if (wm > max_wm) wm = USHRT_MAX; dirty |= raw->fbc != wm; raw->fbc = wm; } /* mark watermarks as invalid */ dirty |= g4x_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX); if (plane_id == PLANE_PRIMARY) dirty |= g4x_raw_fbc_wm_set(crtc_state, level, USHRT_MAX); out: if (dirty) { drm_dbg_kms(&dev_priv->drm, "%s watermarks: normal=%d, SR=%d, HPLL=%d\n", plane->base.name, crtc_state->wm.g4x.raw[G4X_WM_LEVEL_NORMAL].plane[plane_id], crtc_state->wm.g4x.raw[G4X_WM_LEVEL_SR].plane[plane_id], crtc_state->wm.g4x.raw[G4X_WM_LEVEL_HPLL].plane[plane_id]); if (plane_id == PLANE_PRIMARY) drm_dbg_kms(&dev_priv->drm, "FBC watermarks: SR=%d, HPLL=%d\n", crtc_state->wm.g4x.raw[G4X_WM_LEVEL_SR].fbc, crtc_state->wm.g4x.raw[G4X_WM_LEVEL_HPLL].fbc); } return dirty; } static bool g4x_raw_plane_wm_is_valid(const struct intel_crtc_state *crtc_state, enum plane_id plane_id, int level) { const struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level]; return raw->plane[plane_id] <= g4x_plane_fifo_size(plane_id, level); } static bool g4x_raw_crtc_wm_is_valid(const struct intel_crtc_state *crtc_state, int level) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); if (level > dev_priv->wm.max_level) return false; return g4x_raw_plane_wm_is_valid(crtc_state, PLANE_PRIMARY, level) && g4x_raw_plane_wm_is_valid(crtc_state, PLANE_SPRITE0, level) && g4x_raw_plane_wm_is_valid(crtc_state, PLANE_CURSOR, level); } /* mark all levels starting from 'level' as invalid */ static void g4x_invalidate_wms(struct intel_crtc *crtc, struct g4x_wm_state *wm_state, int level) { if (level <= G4X_WM_LEVEL_NORMAL) { enum plane_id plane_id; for_each_plane_id_on_crtc(crtc, plane_id) wm_state->wm.plane[plane_id] = USHRT_MAX; } if (level <= G4X_WM_LEVEL_SR) { wm_state->cxsr = false; wm_state->sr.cursor = USHRT_MAX; wm_state->sr.plane = USHRT_MAX; wm_state->sr.fbc = USHRT_MAX; } if (level <= G4X_WM_LEVEL_HPLL) { wm_state->hpll_en = false; wm_state->hpll.cursor = USHRT_MAX; wm_state->hpll.plane = USHRT_MAX; wm_state->hpll.fbc = USHRT_MAX; } } static bool g4x_compute_fbc_en(const struct g4x_wm_state *wm_state, int level) { if (level < G4X_WM_LEVEL_SR) return false; if (level >= G4X_WM_LEVEL_SR && wm_state->sr.fbc > g4x_fbc_fifo_size(G4X_WM_LEVEL_SR)) return false; if (level >= G4X_WM_LEVEL_HPLL && wm_state->hpll.fbc > g4x_fbc_fifo_size(G4X_WM_LEVEL_HPLL)) return false; return true; } static int g4x_compute_pipe_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); struct g4x_wm_state *wm_state = &crtc_state->wm.g4x.optimal; u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR); const struct g4x_pipe_wm *raw; const struct intel_plane_state *old_plane_state; const struct intel_plane_state *new_plane_state; struct intel_plane *plane; enum plane_id plane_id; int i, level; unsigned int dirty = 0; for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { if (new_plane_state->hw.crtc != &crtc->base && old_plane_state->hw.crtc != &crtc->base) continue; if (g4x_raw_plane_wm_compute(crtc_state, new_plane_state)) dirty |= BIT(plane->id); } if (!dirty) return 0; level = G4X_WM_LEVEL_NORMAL; if (!g4x_raw_crtc_wm_is_valid(crtc_state, level)) goto out; raw = &crtc_state->wm.g4x.raw[level]; for_each_plane_id_on_crtc(crtc, plane_id) wm_state->wm.plane[plane_id] = raw->plane[plane_id]; level = G4X_WM_LEVEL_SR; if (!g4x_raw_crtc_wm_is_valid(crtc_state, level)) goto out; raw = &crtc_state->wm.g4x.raw[level]; wm_state->sr.plane = raw->plane[PLANE_PRIMARY]; wm_state->sr.cursor = raw->plane[PLANE_CURSOR]; wm_state->sr.fbc = raw->fbc; wm_state->cxsr = active_planes == BIT(PLANE_PRIMARY); level = G4X_WM_LEVEL_HPLL; if (!g4x_raw_crtc_wm_is_valid(crtc_state, level)) goto out; raw = &crtc_state->wm.g4x.raw[level]; wm_state->hpll.plane = raw->plane[PLANE_PRIMARY]; wm_state->hpll.cursor = raw->plane[PLANE_CURSOR]; wm_state->hpll.fbc = raw->fbc; wm_state->hpll_en = wm_state->cxsr; level++; out: if (level == G4X_WM_LEVEL_NORMAL) return -EINVAL; /* invalidate the higher levels */ g4x_invalidate_wms(crtc, wm_state, level); /* * Determine if the FBC watermark(s) can be used. IF * this isn't the case we prefer to disable the FBC * watermark(s) rather than disable the SR/HPLL * level(s) entirely. 'level-1' is the highest valid * level here. */ wm_state->fbc_en = g4x_compute_fbc_en(wm_state, level - 1); return 0; } static int g4x_compute_intermediate_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); const struct intel_crtc_state *old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc); struct g4x_wm_state *intermediate = &new_crtc_state->wm.g4x.intermediate; const struct g4x_wm_state *optimal = &new_crtc_state->wm.g4x.optimal; const struct g4x_wm_state *active = &old_crtc_state->wm.g4x.optimal; enum plane_id plane_id; if (!new_crtc_state->hw.active || drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi)) { *intermediate = *optimal; intermediate->cxsr = false; intermediate->hpll_en = false; goto out; } intermediate->cxsr = optimal->cxsr && active->cxsr && !new_crtc_state->disable_cxsr; intermediate->hpll_en = optimal->hpll_en && active->hpll_en && !new_crtc_state->disable_cxsr; intermediate->fbc_en = optimal->fbc_en && active->fbc_en; for_each_plane_id_on_crtc(crtc, plane_id) { intermediate->wm.plane[plane_id] = max(optimal->wm.plane[plane_id], active->wm.plane[plane_id]); drm_WARN_ON(&dev_priv->drm, intermediate->wm.plane[plane_id] > g4x_plane_fifo_size(plane_id, G4X_WM_LEVEL_NORMAL)); } intermediate->sr.plane = max(optimal->sr.plane, active->sr.plane); intermediate->sr.cursor = max(optimal->sr.cursor, active->sr.cursor); intermediate->sr.fbc = max(optimal->sr.fbc, active->sr.fbc); intermediate->hpll.plane = max(optimal->hpll.plane, active->hpll.plane); intermediate->hpll.cursor = max(optimal->hpll.cursor, active->hpll.cursor); intermediate->hpll.fbc = max(optimal->hpll.fbc, active->hpll.fbc); drm_WARN_ON(&dev_priv->drm, (intermediate->sr.plane > g4x_plane_fifo_size(PLANE_PRIMARY, G4X_WM_LEVEL_SR) || intermediate->sr.cursor > g4x_plane_fifo_size(PLANE_CURSOR, G4X_WM_LEVEL_SR)) && intermediate->cxsr); drm_WARN_ON(&dev_priv->drm, (intermediate->sr.plane > g4x_plane_fifo_size(PLANE_PRIMARY, G4X_WM_LEVEL_HPLL) || intermediate->sr.cursor > g4x_plane_fifo_size(PLANE_CURSOR, G4X_WM_LEVEL_HPLL)) && intermediate->hpll_en); drm_WARN_ON(&dev_priv->drm, intermediate->sr.fbc > g4x_fbc_fifo_size(1) && intermediate->fbc_en && intermediate->cxsr); drm_WARN_ON(&dev_priv->drm, intermediate->hpll.fbc > g4x_fbc_fifo_size(2) && intermediate->fbc_en && intermediate->hpll_en); out: /* * If our intermediate WM are identical to the final WM, then we can * omit the post-vblank programming; only update if it's different. */ if (memcmp(intermediate, optimal, sizeof(*intermediate)) != 0) new_crtc_state->wm.need_postvbl_update = true; return 0; } static void g4x_merge_wm(struct drm_i915_private *dev_priv, struct g4x_wm_values *wm) { struct intel_crtc *crtc; int num_active_pipes = 0; wm->cxsr = true; wm->hpll_en = true; wm->fbc_en = true; for_each_intel_crtc(&dev_priv->drm, crtc) { const struct g4x_wm_state *wm_state = &crtc->wm.active.g4x; if (!crtc->active) continue; if (!wm_state->cxsr) wm->cxsr = false; if (!wm_state->hpll_en) wm->hpll_en = false; if (!wm_state->fbc_en) wm->fbc_en = false; num_active_pipes++; } if (num_active_pipes != 1) { wm->cxsr = false; wm->hpll_en = false; wm->fbc_en = false; } for_each_intel_crtc(&dev_priv->drm, crtc) { const struct g4x_wm_state *wm_state = &crtc->wm.active.g4x; enum pipe pipe = crtc->pipe; wm->pipe[pipe] = wm_state->wm; if (crtc->active && wm->cxsr) wm->sr = wm_state->sr; if (crtc->active && wm->hpll_en) wm->hpll = wm_state->hpll; } } static void g4x_program_watermarks(struct drm_i915_private *dev_priv) { struct g4x_wm_values *old_wm = &dev_priv->wm.g4x; struct g4x_wm_values new_wm = {}; g4x_merge_wm(dev_priv, &new_wm); if (memcmp(old_wm, &new_wm, sizeof(new_wm)) == 0) return; if (is_disabling(old_wm->cxsr, new_wm.cxsr, true)) _intel_set_memory_cxsr(dev_priv, false); g4x_write_wm_values(dev_priv, &new_wm); if (is_enabling(old_wm->cxsr, new_wm.cxsr, true)) _intel_set_memory_cxsr(dev_priv, true); *old_wm = new_wm; } static void g4x_initial_watermarks(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); mutex_lock(&dev_priv->wm.wm_mutex); crtc->wm.active.g4x = crtc_state->wm.g4x.intermediate; g4x_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } static void g4x_optimize_watermarks(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); if (!crtc_state->wm.need_postvbl_update) return; mutex_lock(&dev_priv->wm.wm_mutex); crtc->wm.active.g4x = crtc_state->wm.g4x.optimal; g4x_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } /* latency must be in 0.1us units. */ static unsigned int vlv_wm_method2(unsigned int pixel_rate, unsigned int htotal, unsigned int width, unsigned int cpp, unsigned int latency) { unsigned int ret; ret = intel_wm_method2(pixel_rate, htotal, width, cpp, latency); ret = DIV_ROUND_UP(ret, 64); return ret; } static void vlv_setup_wm_latency(struct drm_i915_private *dev_priv) { /* all latencies in usec */ dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM2] = 3; dev_priv->wm.max_level = VLV_WM_LEVEL_PM2; if (IS_CHERRYVIEW(dev_priv)) { dev_priv->wm.pri_latency[VLV_WM_LEVEL_PM5] = 12; dev_priv->wm.pri_latency[VLV_WM_LEVEL_DDR_DVFS] = 33; dev_priv->wm.max_level = VLV_WM_LEVEL_DDR_DVFS; } } static u16 vlv_compute_wm_level(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, int level) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); struct drm_i915_private *dev_priv = to_i915(plane->base.dev); const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode; unsigned int pixel_rate, htotal, cpp, width, wm; if (dev_priv->wm.pri_latency[level] == 0) return USHRT_MAX; if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; cpp = plane_state->hw.fb->format->cpp[0]; pixel_rate = crtc_state->pixel_rate; htotal = pipe_mode->crtc_htotal; width = drm_rect_width(&plane_state->uapi.src) >> 16; if (plane->id == PLANE_CURSOR) { /* * FIXME the formula gives values that are * too big for the cursor FIFO, and hence we * would never be able to use cursors. For * now just hardcode the watermark. */ wm = 63; } else { wm = vlv_wm_method2(pixel_rate, htotal, width, cpp, dev_priv->wm.pri_latency[level] * 10); } return min_t(unsigned int, wm, USHRT_MAX); } static bool vlv_need_sprite0_fifo_workaround(unsigned int active_planes) { return (active_planes & (BIT(PLANE_SPRITE0) | BIT(PLANE_SPRITE1))) == BIT(PLANE_SPRITE1); } static int vlv_compute_fifo(struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2]; struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR); int num_active_planes = hweight8(active_planes); const int fifo_size = 511; int fifo_extra, fifo_left = fifo_size; int sprite0_fifo_extra = 0; unsigned int total_rate; enum plane_id plane_id; /* * When enabling sprite0 after sprite1 has already been enabled * we tend to get an underrun unless sprite0 already has some * FIFO space allcoated. Hence we always allocate at least one * cacheline for sprite0 whenever sprite1 is enabled. * * All other plane enable sequences appear immune to this problem. */ if (vlv_need_sprite0_fifo_workaround(active_planes)) sprite0_fifo_extra = 1; total_rate = raw->plane[PLANE_PRIMARY] + raw->plane[PLANE_SPRITE0] + raw->plane[PLANE_SPRITE1] + sprite0_fifo_extra; if (total_rate > fifo_size) return -EINVAL; if (total_rate == 0) total_rate = 1; for_each_plane_id_on_crtc(crtc, plane_id) { unsigned int rate; if ((active_planes & BIT(plane_id)) == 0) { fifo_state->plane[plane_id] = 0; continue; } rate = raw->plane[plane_id]; fifo_state->plane[plane_id] = fifo_size * rate / total_rate; fifo_left -= fifo_state->plane[plane_id]; } fifo_state->plane[PLANE_SPRITE0] += sprite0_fifo_extra; fifo_left -= sprite0_fifo_extra; fifo_state->plane[PLANE_CURSOR] = 63; fifo_extra = DIV_ROUND_UP(fifo_left, num_active_planes ?: 1); /* spread the remainder evenly */ for_each_plane_id_on_crtc(crtc, plane_id) { int plane_extra; if (fifo_left == 0) break; if ((active_planes & BIT(plane_id)) == 0) continue; plane_extra = min(fifo_extra, fifo_left); fifo_state->plane[plane_id] += plane_extra; fifo_left -= plane_extra; } drm_WARN_ON(&dev_priv->drm, active_planes != 0 && fifo_left != 0); /* give it all to the first plane if none are active */ if (active_planes == 0) { drm_WARN_ON(&dev_priv->drm, fifo_left != fifo_size); fifo_state->plane[PLANE_PRIMARY] = fifo_left; } return 0; } /* mark all levels starting from 'level' as invalid */ static void vlv_invalidate_wms(struct intel_crtc *crtc, struct vlv_wm_state *wm_state, int level) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); for (; level < intel_wm_num_levels(dev_priv); level++) { enum plane_id plane_id; for_each_plane_id_on_crtc(crtc, plane_id) wm_state->wm[level].plane[plane_id] = USHRT_MAX; wm_state->sr[level].cursor = USHRT_MAX; wm_state->sr[level].plane = USHRT_MAX; } } static u16 vlv_invert_wm_value(u16 wm, u16 fifo_size) { if (wm > fifo_size) return USHRT_MAX; else return fifo_size - wm; } /* * Starting from 'level' set all higher * levels to 'value' in the "raw" watermarks. */ static bool vlv_raw_plane_wm_set(struct intel_crtc_state *crtc_state, int level, enum plane_id plane_id, u16 value) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); int num_levels = intel_wm_num_levels(dev_priv); bool dirty = false; for (; level < num_levels; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level]; dirty |= raw->plane[plane_id] != value; raw->plane[plane_id] = value; } return dirty; } static bool vlv_raw_plane_wm_compute(struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); enum plane_id plane_id = plane->id; int num_levels = intel_wm_num_levels(to_i915(plane->base.dev)); int level; bool dirty = false; if (!intel_wm_plane_visible(crtc_state, plane_state)) { dirty |= vlv_raw_plane_wm_set(crtc_state, 0, plane_id, 0); goto out; } for (level = 0; level < num_levels; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level]; int wm = vlv_compute_wm_level(crtc_state, plane_state, level); int max_wm = plane_id == PLANE_CURSOR ? 63 : 511; if (wm > max_wm) break; dirty |= raw->plane[plane_id] != wm; raw->plane[plane_id] = wm; } /* mark all higher levels as invalid */ dirty |= vlv_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX); out: if (dirty) drm_dbg_kms(&dev_priv->drm, "%s watermarks: PM2=%d, PM5=%d, DDR DVFS=%d\n", plane->base.name, crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM2].plane[plane_id], crtc_state->wm.vlv.raw[VLV_WM_LEVEL_PM5].plane[plane_id], crtc_state->wm.vlv.raw[VLV_WM_LEVEL_DDR_DVFS].plane[plane_id]); return dirty; } static bool vlv_raw_plane_wm_is_valid(const struct intel_crtc_state *crtc_state, enum plane_id plane_id, int level) { const struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level]; const struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; return raw->plane[plane_id] <= fifo_state->plane[plane_id]; } static bool vlv_raw_crtc_wm_is_valid(const struct intel_crtc_state *crtc_state, int level) { return vlv_raw_plane_wm_is_valid(crtc_state, PLANE_PRIMARY, level) && vlv_raw_plane_wm_is_valid(crtc_state, PLANE_SPRITE0, level) && vlv_raw_plane_wm_is_valid(crtc_state, PLANE_SPRITE1, level) && vlv_raw_plane_wm_is_valid(crtc_state, PLANE_CURSOR, level); } static int vlv_compute_pipe_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); struct vlv_wm_state *wm_state = &crtc_state->wm.vlv.optimal; const struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; u8 active_planes = crtc_state->active_planes & ~BIT(PLANE_CURSOR); int num_active_planes = hweight8(active_planes); bool needs_modeset = drm_atomic_crtc_needs_modeset(&crtc_state->uapi); const struct intel_plane_state *old_plane_state; const struct intel_plane_state *new_plane_state; struct intel_plane *plane; enum plane_id plane_id; int level, ret, i; unsigned int dirty = 0; for_each_oldnew_intel_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { if (new_plane_state->hw.crtc != &crtc->base && old_plane_state->hw.crtc != &crtc->base) continue; if (vlv_raw_plane_wm_compute(crtc_state, new_plane_state)) dirty |= BIT(plane->id); } /* * DSPARB registers may have been reset due to the * power well being turned off. Make sure we restore * them to a consistent state even if no primary/sprite * planes are initially active. */ if (needs_modeset) crtc_state->fifo_changed = true; if (!dirty) return 0; /* cursor changes don't warrant a FIFO recompute */ if (dirty & ~BIT(PLANE_CURSOR)) { const struct intel_crtc_state *old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc); const struct vlv_fifo_state *old_fifo_state = &old_crtc_state->wm.vlv.fifo_state; ret = vlv_compute_fifo(crtc_state); if (ret) return ret; if (needs_modeset || memcmp(old_fifo_state, fifo_state, sizeof(*fifo_state)) != 0) crtc_state->fifo_changed = true; } /* initially allow all levels */ wm_state->num_levels = intel_wm_num_levels(dev_priv); /* * Note that enabling cxsr with no primary/sprite planes * enabled can wedge the pipe. Hence we only allow cxsr * with exactly one enabled primary/sprite plane. */ wm_state->cxsr = crtc->pipe != PIPE_C && num_active_planes == 1; for (level = 0; level < wm_state->num_levels; level++) { const struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level]; const int sr_fifo_size = INTEL_NUM_PIPES(dev_priv) * 512 - 1; if (!vlv_raw_crtc_wm_is_valid(crtc_state, level)) break; for_each_plane_id_on_crtc(crtc, plane_id) { wm_state->wm[level].plane[plane_id] = vlv_invert_wm_value(raw->plane[plane_id], fifo_state->plane[plane_id]); } wm_state->sr[level].plane = vlv_invert_wm_value(max3(raw->plane[PLANE_PRIMARY], raw->plane[PLANE_SPRITE0], raw->plane[PLANE_SPRITE1]), sr_fifo_size); wm_state->sr[level].cursor = vlv_invert_wm_value(raw->plane[PLANE_CURSOR], 63); } if (level == 0) return -EINVAL; /* limit to only levels we can actually handle */ wm_state->num_levels = level; /* invalidate the higher levels */ vlv_invalidate_wms(crtc, wm_state, level); return 0; } #define VLV_FIFO(plane, value) \ (((value) << DSPARB_ ## plane ## _SHIFT_VLV) & DSPARB_ ## plane ## _MASK_VLV) static void vlv_atomic_update_fifo(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_uncore *uncore = &dev_priv->uncore; const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); const struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; int sprite0_start, sprite1_start, fifo_size; u32 dsparb, dsparb2, dsparb3; if (!crtc_state->fifo_changed) return; sprite0_start = fifo_state->plane[PLANE_PRIMARY]; sprite1_start = fifo_state->plane[PLANE_SPRITE0] + sprite0_start; fifo_size = fifo_state->plane[PLANE_SPRITE1] + sprite1_start; drm_WARN_ON(&dev_priv->drm, fifo_state->plane[PLANE_CURSOR] != 63); drm_WARN_ON(&dev_priv->drm, fifo_size != 511); trace_vlv_fifo_size(crtc, sprite0_start, sprite1_start, fifo_size); /* * uncore.lock serves a double purpose here. It allows us to * use the less expensive I915_{READ,WRITE}_FW() functions, and * it protects the DSPARB registers from getting clobbered by * parallel updates from multiple pipes. * * intel_pipe_update_start() has already disabled interrupts * for us, so a plain spin_lock() is sufficient here. */ spin_lock(&uncore->lock); switch (crtc->pipe) { case PIPE_A: dsparb = intel_uncore_read_fw(uncore, DSPARB); dsparb2 = intel_uncore_read_fw(uncore, DSPARB2); dsparb &= ~(VLV_FIFO(SPRITEA, 0xff) | VLV_FIFO(SPRITEB, 0xff)); dsparb |= (VLV_FIFO(SPRITEA, sprite0_start) | VLV_FIFO(SPRITEB, sprite1_start)); dsparb2 &= ~(VLV_FIFO(SPRITEA_HI, 0x1) | VLV_FIFO(SPRITEB_HI, 0x1)); dsparb2 |= (VLV_FIFO(SPRITEA_HI, sprite0_start >> 8) | VLV_FIFO(SPRITEB_HI, sprite1_start >> 8)); intel_uncore_write_fw(uncore, DSPARB, dsparb); intel_uncore_write_fw(uncore, DSPARB2, dsparb2); break; case PIPE_B: dsparb = intel_uncore_read_fw(uncore, DSPARB); dsparb2 = intel_uncore_read_fw(uncore, DSPARB2); dsparb &= ~(VLV_FIFO(SPRITEC, 0xff) | VLV_FIFO(SPRITED, 0xff)); dsparb |= (VLV_FIFO(SPRITEC, sprite0_start) | VLV_FIFO(SPRITED, sprite1_start)); dsparb2 &= ~(VLV_FIFO(SPRITEC_HI, 0xff) | VLV_FIFO(SPRITED_HI, 0xff)); dsparb2 |= (VLV_FIFO(SPRITEC_HI, sprite0_start >> 8) | VLV_FIFO(SPRITED_HI, sprite1_start >> 8)); intel_uncore_write_fw(uncore, DSPARB, dsparb); intel_uncore_write_fw(uncore, DSPARB2, dsparb2); break; case PIPE_C: dsparb3 = intel_uncore_read_fw(uncore, DSPARB3); dsparb2 = intel_uncore_read_fw(uncore, DSPARB2); dsparb3 &= ~(VLV_FIFO(SPRITEE, 0xff) | VLV_FIFO(SPRITEF, 0xff)); dsparb3 |= (VLV_FIFO(SPRITEE, sprite0_start) | VLV_FIFO(SPRITEF, sprite1_start)); dsparb2 &= ~(VLV_FIFO(SPRITEE_HI, 0xff) | VLV_FIFO(SPRITEF_HI, 0xff)); dsparb2 |= (VLV_FIFO(SPRITEE_HI, sprite0_start >> 8) | VLV_FIFO(SPRITEF_HI, sprite1_start >> 8)); intel_uncore_write_fw(uncore, DSPARB3, dsparb3); intel_uncore_write_fw(uncore, DSPARB2, dsparb2); break; default: break; } intel_uncore_posting_read_fw(uncore, DSPARB); spin_unlock(&uncore->lock); } #undef VLV_FIFO static int vlv_compute_intermediate_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); const struct intel_crtc_state *old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc); struct vlv_wm_state *intermediate = &new_crtc_state->wm.vlv.intermediate; const struct vlv_wm_state *optimal = &new_crtc_state->wm.vlv.optimal; const struct vlv_wm_state *active = &old_crtc_state->wm.vlv.optimal; int level; if (!new_crtc_state->hw.active || drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi)) { *intermediate = *optimal; intermediate->cxsr = false; goto out; } intermediate->num_levels = min(optimal->num_levels, active->num_levels); intermediate->cxsr = optimal->cxsr && active->cxsr && !new_crtc_state->disable_cxsr; for (level = 0; level < intermediate->num_levels; level++) { enum plane_id plane_id; for_each_plane_id_on_crtc(crtc, plane_id) { intermediate->wm[level].plane[plane_id] = min(optimal->wm[level].plane[plane_id], active->wm[level].plane[plane_id]); } intermediate->sr[level].plane = min(optimal->sr[level].plane, active->sr[level].plane); intermediate->sr[level].cursor = min(optimal->sr[level].cursor, active->sr[level].cursor); } vlv_invalidate_wms(crtc, intermediate, level); out: /* * If our intermediate WM are identical to the final WM, then we can * omit the post-vblank programming; only update if it's different. */ if (memcmp(intermediate, optimal, sizeof(*intermediate)) != 0) new_crtc_state->wm.need_postvbl_update = true; return 0; } static void vlv_merge_wm(struct drm_i915_private *dev_priv, struct vlv_wm_values *wm) { struct intel_crtc *crtc; int num_active_pipes = 0; wm->level = dev_priv->wm.max_level; wm->cxsr = true; for_each_intel_crtc(&dev_priv->drm, crtc) { const struct vlv_wm_state *wm_state = &crtc->wm.active.vlv; if (!crtc->active) continue; if (!wm_state->cxsr) wm->cxsr = false; num_active_pipes++; wm->level = min_t(int, wm->level, wm_state->num_levels - 1); } if (num_active_pipes != 1) wm->cxsr = false; if (num_active_pipes > 1) wm->level = VLV_WM_LEVEL_PM2; for_each_intel_crtc(&dev_priv->drm, crtc) { const struct vlv_wm_state *wm_state = &crtc->wm.active.vlv; enum pipe pipe = crtc->pipe; wm->pipe[pipe] = wm_state->wm[wm->level]; if (crtc->active && wm->cxsr) wm->sr = wm_state->sr[wm->level]; wm->ddl[pipe].plane[PLANE_PRIMARY] = DDL_PRECISION_HIGH | 2; wm->ddl[pipe].plane[PLANE_SPRITE0] = DDL_PRECISION_HIGH | 2; wm->ddl[pipe].plane[PLANE_SPRITE1] = DDL_PRECISION_HIGH | 2; wm->ddl[pipe].plane[PLANE_CURSOR] = DDL_PRECISION_HIGH | 2; } } static void vlv_program_watermarks(struct drm_i915_private *dev_priv) { struct vlv_wm_values *old_wm = &dev_priv->wm.vlv; struct vlv_wm_values new_wm = {}; vlv_merge_wm(dev_priv, &new_wm); if (memcmp(old_wm, &new_wm, sizeof(new_wm)) == 0) return; if (is_disabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_DDR_DVFS)) chv_set_memory_dvfs(dev_priv, false); if (is_disabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_PM5)) chv_set_memory_pm5(dev_priv, false); if (is_disabling(old_wm->cxsr, new_wm.cxsr, true)) _intel_set_memory_cxsr(dev_priv, false); vlv_write_wm_values(dev_priv, &new_wm); if (is_enabling(old_wm->cxsr, new_wm.cxsr, true)) _intel_set_memory_cxsr(dev_priv, true); if (is_enabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_PM5)) chv_set_memory_pm5(dev_priv, true); if (is_enabling(old_wm->level, new_wm.level, VLV_WM_LEVEL_DDR_DVFS)) chv_set_memory_dvfs(dev_priv, true); *old_wm = new_wm; } static void vlv_initial_watermarks(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); mutex_lock(&dev_priv->wm.wm_mutex); crtc->wm.active.vlv = crtc_state->wm.vlv.intermediate; vlv_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } static void vlv_optimize_watermarks(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); if (!crtc_state->wm.need_postvbl_update) return; mutex_lock(&dev_priv->wm.wm_mutex); crtc->wm.active.vlv = crtc_state->wm.vlv.optimal; vlv_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } static void i965_update_wm(struct drm_i915_private *dev_priv) { struct intel_crtc *crtc; int srwm = 1; int cursor_sr = 16; bool cxsr_enabled; /* Calc sr entries for one plane configs */ crtc = single_enabled_crtc(dev_priv); if (crtc) { /* self-refresh has much higher latency */ static const int sr_latency_ns = 12000; const struct drm_display_mode *pipe_mode = &crtc->config->hw.pipe_mode; const struct drm_framebuffer *fb = crtc->base.primary->state->fb; int pixel_rate = crtc->config->pixel_rate; int htotal = pipe_mode->crtc_htotal; int width = drm_rect_width(&crtc->base.primary->state->src) >> 16; int cpp = fb->format->cpp[0]; int entries; entries = intel_wm_method2(pixel_rate, htotal, width, cpp, sr_latency_ns / 100); entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE); srwm = I965_FIFO_SIZE - entries; if (srwm < 0) srwm = 1; srwm &= 0x1ff; drm_dbg_kms(&dev_priv->drm, "self-refresh entries: %d, wm: %d\n", entries, srwm); entries = intel_wm_method2(pixel_rate, htotal, crtc->base.cursor->state->crtc_w, 4, sr_latency_ns / 100); entries = DIV_ROUND_UP(entries, i965_cursor_wm_info.cacheline_size) + i965_cursor_wm_info.guard_size; cursor_sr = i965_cursor_wm_info.fifo_size - entries; if (cursor_sr > i965_cursor_wm_info.max_wm) cursor_sr = i965_cursor_wm_info.max_wm; drm_dbg_kms(&dev_priv->drm, "self-refresh watermark: display plane %d " "cursor %d\n", srwm, cursor_sr); cxsr_enabled = true; } else { cxsr_enabled = false; /* Turn off self refresh if both pipes are enabled */ intel_set_memory_cxsr(dev_priv, false); } drm_dbg_kms(&dev_priv->drm, "Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n", srwm); /* 965 has limitations... */ intel_uncore_write(&dev_priv->uncore, DSPFW1, FW_WM(srwm, SR) | FW_WM(8, CURSORB) | FW_WM(8, PLANEB) | FW_WM(8, PLANEA)); intel_uncore_write(&dev_priv->uncore, DSPFW2, FW_WM(8, CURSORA) | FW_WM(8, PLANEC_OLD)); /* update cursor SR watermark */ intel_uncore_write(&dev_priv->uncore, DSPFW3, FW_WM(cursor_sr, CURSOR_SR)); if (cxsr_enabled) intel_set_memory_cxsr(dev_priv, true); } #undef FW_WM static struct intel_crtc *intel_crtc_for_plane(struct drm_i915_private *i915, enum i9xx_plane_id i9xx_plane) { struct intel_plane *plane; for_each_intel_plane(&i915->drm, plane) { if (plane->id == PLANE_PRIMARY && plane->i9xx_plane == i9xx_plane) return intel_crtc_for_pipe(i915, plane->pipe); } return NULL; } static void i9xx_update_wm(struct drm_i915_private *dev_priv) { const struct intel_watermark_params *wm_info; u32 fwater_lo; u32 fwater_hi; int cwm, srwm = 1; int fifo_size; int planea_wm, planeb_wm; struct intel_crtc *crtc; if (IS_I945GM(dev_priv)) wm_info = &i945_wm_info; else if (DISPLAY_VER(dev_priv) != 2) wm_info = &i915_wm_info; else wm_info = &i830_a_wm_info; if (DISPLAY_VER(dev_priv) == 2) fifo_size = i830_get_fifo_size(dev_priv, PLANE_A); else fifo_size = i9xx_get_fifo_size(dev_priv, PLANE_A); crtc = intel_crtc_for_plane(dev_priv, PLANE_A); if (intel_crtc_active(crtc)) { const struct drm_framebuffer *fb = crtc->base.primary->state->fb; int cpp; if (DISPLAY_VER(dev_priv) == 2) cpp = 4; else cpp = fb->format->cpp[0]; planea_wm = intel_calculate_wm(crtc->config->pixel_rate, wm_info, fifo_size, cpp, pessimal_latency_ns); } else { planea_wm = fifo_size - wm_info->guard_size; if (planea_wm > (long)wm_info->max_wm) planea_wm = wm_info->max_wm; } if (DISPLAY_VER(dev_priv) == 2) wm_info = &i830_bc_wm_info; if (DISPLAY_VER(dev_priv) == 2) fifo_size = i830_get_fifo_size(dev_priv, PLANE_B); else fifo_size = i9xx_get_fifo_size(dev_priv, PLANE_B); crtc = intel_crtc_for_plane(dev_priv, PLANE_B); if (intel_crtc_active(crtc)) { const struct drm_framebuffer *fb = crtc->base.primary->state->fb; int cpp; if (DISPLAY_VER(dev_priv) == 2) cpp = 4; else cpp = fb->format->cpp[0]; planeb_wm = intel_calculate_wm(crtc->config->pixel_rate, wm_info, fifo_size, cpp, pessimal_latency_ns); } else { planeb_wm = fifo_size - wm_info->guard_size; if (planeb_wm > (long)wm_info->max_wm) planeb_wm = wm_info->max_wm; } drm_dbg_kms(&dev_priv->drm, "FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm); crtc = single_enabled_crtc(dev_priv); if (IS_I915GM(dev_priv) && crtc) { struct drm_i915_gem_object *obj; obj = intel_fb_obj(crtc->base.primary->state->fb); /* self-refresh seems busted with untiled */ if (!i915_gem_object_is_tiled(obj)) crtc = NULL; } /* * Overlay gets an aggressive default since video jitter is bad. */ cwm = 2; /* Play safe and disable self-refresh before adjusting watermarks. */ intel_set_memory_cxsr(dev_priv, false); /* Calc sr entries for one plane configs */ if (HAS_FW_BLC(dev_priv) && crtc) { /* self-refresh has much higher latency */ static const int sr_latency_ns = 6000; const struct drm_display_mode *pipe_mode = &crtc->config->hw.pipe_mode; const struct drm_framebuffer *fb = crtc->base.primary->state->fb; int pixel_rate = crtc->config->pixel_rate; int htotal = pipe_mode->crtc_htotal; int width = drm_rect_width(&crtc->base.primary->state->src) >> 16; int cpp; int entries; if (IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) cpp = 4; else cpp = fb->format->cpp[0]; entries = intel_wm_method2(pixel_rate, htotal, width, cpp, sr_latency_ns / 100); entries = DIV_ROUND_UP(entries, wm_info->cacheline_size); drm_dbg_kms(&dev_priv->drm, "self-refresh entries: %d\n", entries); srwm = wm_info->fifo_size - entries; if (srwm < 0) srwm = 1; if (IS_I945G(dev_priv) || IS_I945GM(dev_priv)) intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, FW_BLC_SELF_FIFO_MASK | (srwm & 0xff)); else intel_uncore_write(&dev_priv->uncore, FW_BLC_SELF, srwm & 0x3f); } drm_dbg_kms(&dev_priv->drm, "Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n", planea_wm, planeb_wm, cwm, srwm); fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f); fwater_hi = (cwm & 0x1f); /* Set request length to 8 cachelines per fetch */ fwater_lo = fwater_lo | (1 << 24) | (1 << 8); fwater_hi = fwater_hi | (1 << 8); intel_uncore_write(&dev_priv->uncore, FW_BLC, fwater_lo); intel_uncore_write(&dev_priv->uncore, FW_BLC2, fwater_hi); if (crtc) intel_set_memory_cxsr(dev_priv, true); } static void i845_update_wm(struct drm_i915_private *dev_priv) { struct intel_crtc *crtc; u32 fwater_lo; int planea_wm; crtc = single_enabled_crtc(dev_priv); if (crtc == NULL) return; planea_wm = intel_calculate_wm(crtc->config->pixel_rate, &i845_wm_info, i845_get_fifo_size(dev_priv, PLANE_A), 4, pessimal_latency_ns); fwater_lo = intel_uncore_read(&dev_priv->uncore, FW_BLC) & ~0xfff; fwater_lo |= (3<<8) | planea_wm; drm_dbg_kms(&dev_priv->drm, "Setting FIFO watermarks - A: %d\n", planea_wm); intel_uncore_write(&dev_priv->uncore, FW_BLC, fwater_lo); } /* latency must be in 0.1us units. */ static unsigned int ilk_wm_method1(unsigned int pixel_rate, unsigned int cpp, unsigned int latency) { unsigned int ret; ret = intel_wm_method1(pixel_rate, cpp, latency); ret = DIV_ROUND_UP(ret, 64) + 2; return ret; } /* latency must be in 0.1us units. */ static unsigned int ilk_wm_method2(unsigned int pixel_rate, unsigned int htotal, unsigned int width, unsigned int cpp, unsigned int latency) { unsigned int ret; ret = intel_wm_method2(pixel_rate, htotal, width, cpp, latency); ret = DIV_ROUND_UP(ret, 64) + 2; return ret; } static u32 ilk_wm_fbc(u32 pri_val, u32 horiz_pixels, u8 cpp) { /* * Neither of these should be possible since this function shouldn't be * called if the CRTC is off or the plane is invisible. But let's be * extra paranoid to avoid a potential divide-by-zero if we screw up * elsewhere in the driver. */ if (WARN_ON(!cpp)) return 0; if (WARN_ON(!horiz_pixels)) return 0; return DIV_ROUND_UP(pri_val * 64, horiz_pixels * cpp) + 2; } struct ilk_wm_maximums { u16 pri; u16 spr; u16 cur; u16 fbc; }; /* * For both WM_PIPE and WM_LP. * mem_value must be in 0.1us units. */ static u32 ilk_compute_pri_wm(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, u32 mem_value, bool is_lp) { u32 method1, method2; int cpp; if (mem_value == 0) return U32_MAX; if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; cpp = plane_state->hw.fb->format->cpp[0]; method1 = ilk_wm_method1(crtc_state->pixel_rate, cpp, mem_value); if (!is_lp) return method1; method2 = ilk_wm_method2(crtc_state->pixel_rate, crtc_state->hw.pipe_mode.crtc_htotal, drm_rect_width(&plane_state->uapi.src) >> 16, cpp, mem_value); return min(method1, method2); } /* * For both WM_PIPE and WM_LP. * mem_value must be in 0.1us units. */ static u32 ilk_compute_spr_wm(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, u32 mem_value) { u32 method1, method2; int cpp; if (mem_value == 0) return U32_MAX; if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; cpp = plane_state->hw.fb->format->cpp[0]; method1 = ilk_wm_method1(crtc_state->pixel_rate, cpp, mem_value); method2 = ilk_wm_method2(crtc_state->pixel_rate, crtc_state->hw.pipe_mode.crtc_htotal, drm_rect_width(&plane_state->uapi.src) >> 16, cpp, mem_value); return min(method1, method2); } /* * For both WM_PIPE and WM_LP. * mem_value must be in 0.1us units. */ static u32 ilk_compute_cur_wm(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, u32 mem_value) { int cpp; if (mem_value == 0) return U32_MAX; if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; cpp = plane_state->hw.fb->format->cpp[0]; return ilk_wm_method2(crtc_state->pixel_rate, crtc_state->hw.pipe_mode.crtc_htotal, drm_rect_width(&plane_state->uapi.src) >> 16, cpp, mem_value); } /* Only for WM_LP. */ static u32 ilk_compute_fbc_wm(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, u32 pri_val) { int cpp; if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; cpp = plane_state->hw.fb->format->cpp[0]; return ilk_wm_fbc(pri_val, drm_rect_width(&plane_state->uapi.src) >> 16, cpp); } static unsigned int ilk_display_fifo_size(const struct drm_i915_private *dev_priv) { if (DISPLAY_VER(dev_priv) >= 8) return 3072; else if (DISPLAY_VER(dev_priv) >= 7) return 768; else return 512; } static unsigned int ilk_plane_wm_reg_max(const struct drm_i915_private *dev_priv, int level, bool is_sprite) { if (DISPLAY_VER(dev_priv) >= 8) /* BDW primary/sprite plane watermarks */ return level == 0 ? 255 : 2047; else if (DISPLAY_VER(dev_priv) >= 7) /* IVB/HSW primary/sprite plane watermarks */ return level == 0 ? 127 : 1023; else if (!is_sprite) /* ILK/SNB primary plane watermarks */ return level == 0 ? 127 : 511; else /* ILK/SNB sprite plane watermarks */ return level == 0 ? 63 : 255; } static unsigned int ilk_cursor_wm_reg_max(const struct drm_i915_private *dev_priv, int level) { if (DISPLAY_VER(dev_priv) >= 7) return level == 0 ? 63 : 255; else return level == 0 ? 31 : 63; } static unsigned int ilk_fbc_wm_reg_max(const struct drm_i915_private *dev_priv) { if (DISPLAY_VER(dev_priv) >= 8) return 31; else return 15; } /* Calculate the maximum primary/sprite plane watermark */ static unsigned int ilk_plane_wm_max(const struct drm_i915_private *dev_priv, int level, const struct intel_wm_config *config, enum intel_ddb_partitioning ddb_partitioning, bool is_sprite) { unsigned int fifo_size = ilk_display_fifo_size(dev_priv); /* if sprites aren't enabled, sprites get nothing */ if (is_sprite && !config->sprites_enabled) return 0; /* HSW allows LP1+ watermarks even with multiple pipes */ if (level == 0 || config->num_pipes_active > 1) { fifo_size /= INTEL_NUM_PIPES(dev_priv); /* * For some reason the non self refresh * FIFO size is only half of the self * refresh FIFO size on ILK/SNB. */ if (DISPLAY_VER(dev_priv) <= 6) fifo_size /= 2; } if (config->sprites_enabled) { /* level 0 is always calculated with 1:1 split */ if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) { if (is_sprite) fifo_size *= 5; fifo_size /= 6; } else { fifo_size /= 2; } } /* clamp to max that the registers can hold */ return min(fifo_size, ilk_plane_wm_reg_max(dev_priv, level, is_sprite)); } /* Calculate the maximum cursor plane watermark */ static unsigned int ilk_cursor_wm_max(const struct drm_i915_private *dev_priv, int level, const struct intel_wm_config *config) { /* HSW LP1+ watermarks w/ multiple pipes */ if (level > 0 && config->num_pipes_active > 1) return 64; /* otherwise just report max that registers can hold */ return ilk_cursor_wm_reg_max(dev_priv, level); } static void ilk_compute_wm_maximums(const struct drm_i915_private *dev_priv, int level, const struct intel_wm_config *config, enum intel_ddb_partitioning ddb_partitioning, struct ilk_wm_maximums *max) { max->pri = ilk_plane_wm_max(dev_priv, level, config, ddb_partitioning, false); max->spr = ilk_plane_wm_max(dev_priv, level, config, ddb_partitioning, true); max->cur = ilk_cursor_wm_max(dev_priv, level, config); max->fbc = ilk_fbc_wm_reg_max(dev_priv); } static void ilk_compute_wm_reg_maximums(const struct drm_i915_private *dev_priv, int level, struct ilk_wm_maximums *max) { max->pri = ilk_plane_wm_reg_max(dev_priv, level, false); max->spr = ilk_plane_wm_reg_max(dev_priv, level, true); max->cur = ilk_cursor_wm_reg_max(dev_priv, level); max->fbc = ilk_fbc_wm_reg_max(dev_priv); } static bool ilk_validate_wm_level(int level, const struct ilk_wm_maximums *max, struct intel_wm_level *result) { bool ret; /* already determined to be invalid? */ if (!result->enable) return false; result->enable = result->pri_val <= max->pri && result->spr_val <= max->spr && result->cur_val <= max->cur; ret = result->enable; /* * HACK until we can pre-compute everything, * and thus fail gracefully if LP0 watermarks * are exceeded... */ if (level == 0 && !result->enable) { if (result->pri_val > max->pri) DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n", level, result->pri_val, max->pri); if (result->spr_val > max->spr) DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n", level, result->spr_val, max->spr); if (result->cur_val > max->cur) DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n", level, result->cur_val, max->cur); result->pri_val = min_t(u32, result->pri_val, max->pri); result->spr_val = min_t(u32, result->spr_val, max->spr); result->cur_val = min_t(u32, result->cur_val, max->cur); result->enable = true; } return ret; } static void ilk_compute_wm_level(const struct drm_i915_private *dev_priv, const struct intel_crtc *crtc, int level, struct intel_crtc_state *crtc_state, const struct intel_plane_state *pristate, const struct intel_plane_state *sprstate, const struct intel_plane_state *curstate, struct intel_wm_level *result) { u16 pri_latency = dev_priv->wm.pri_latency[level]; u16 spr_latency = dev_priv->wm.spr_latency[level]; u16 cur_latency = dev_priv->wm.cur_latency[level]; /* WM1+ latency values stored in 0.5us units */ if (level > 0) { pri_latency *= 5; spr_latency *= 5; cur_latency *= 5; } if (pristate) { result->pri_val = ilk_compute_pri_wm(crtc_state, pristate, pri_latency, level); result->fbc_val = ilk_compute_fbc_wm(crtc_state, pristate, result->pri_val); } if (sprstate) result->spr_val = ilk_compute_spr_wm(crtc_state, sprstate, spr_latency); if (curstate) result->cur_val = ilk_compute_cur_wm(crtc_state, curstate, cur_latency); result->enable = true; } static void intel_read_wm_latency(struct drm_i915_private *dev_priv, u16 wm[]) { struct intel_uncore *uncore = &dev_priv->uncore; if (DISPLAY_VER(dev_priv) >= 9) { u32 val; int ret, i; int level, max_level = ilk_wm_max_level(dev_priv); int mult = IS_DG2(dev_priv) ? 2 : 1; /* read the first set of memory latencies[0:3] */ val = 0; /* data0 to be programmed to 0 for first set */ ret = snb_pcode_read(&dev_priv->uncore, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL); if (ret) { drm_err(&dev_priv->drm, "SKL Mailbox read error = %d\n", ret); return; } wm[0] = (val & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; wm[1] = ((val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; wm[2] = ((val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; wm[3] = ((val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; /* read the second set of memory latencies[4:7] */ val = 1; /* data0 to be programmed to 1 for second set */ ret = snb_pcode_read(&dev_priv->uncore, GEN9_PCODE_READ_MEM_LATENCY, &val, NULL); if (ret) { drm_err(&dev_priv->drm, "SKL Mailbox read error = %d\n", ret); return; } wm[4] = (val & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; wm[5] = ((val >> GEN9_MEM_LATENCY_LEVEL_1_5_SHIFT) & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; wm[6] = ((val >> GEN9_MEM_LATENCY_LEVEL_2_6_SHIFT) & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; wm[7] = ((val >> GEN9_MEM_LATENCY_LEVEL_3_7_SHIFT) & GEN9_MEM_LATENCY_LEVEL_MASK) * mult; /* * If a level n (n > 1) has a 0us latency, all levels m (m >= n) * need to be disabled. We make sure to sanitize the values out * of the punit to satisfy this requirement. */ for (level = 1; level <= max_level; level++) { if (wm[level] == 0) { for (i = level + 1; i <= max_level; i++) wm[i] = 0; max_level = level - 1; break; } } /* * WaWmMemoryReadLatency * * punit doesn't take into account the read latency so we need * to add proper adjustement to each valid level we retrieve * from the punit when level 0 response data is 0us. */ if (wm[0] == 0) { u8 adjust = DISPLAY_VER(dev_priv) >= 12 ? 3 : 2; for (level = 0; level <= max_level; level++) wm[level] += adjust; } /* * WA Level-0 adjustment for 16GB DIMMs: SKL+ * If we could not get dimm info enable this WA to prevent from * any underrun. If not able to get Dimm info assume 16GB dimm * to avoid any underrun. */ if (dev_priv->dram_info.wm_lv_0_adjust_needed) wm[0] += 1; } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) { u64 sskpd = intel_uncore_read64(uncore, MCH_SSKPD); wm[0] = REG_FIELD_GET64(SSKPD_NEW_WM0_MASK_HSW, sskpd); if (wm[0] == 0) wm[0] = REG_FIELD_GET64(SSKPD_OLD_WM0_MASK_HSW, sskpd); wm[1] = REG_FIELD_GET64(SSKPD_WM1_MASK_HSW, sskpd); wm[2] = REG_FIELD_GET64(SSKPD_WM2_MASK_HSW, sskpd); wm[3] = REG_FIELD_GET64(SSKPD_WM3_MASK_HSW, sskpd); wm[4] = REG_FIELD_GET64(SSKPD_WM4_MASK_HSW, sskpd); } else if (DISPLAY_VER(dev_priv) >= 6) { u32 sskpd = intel_uncore_read(uncore, MCH_SSKPD); wm[0] = REG_FIELD_GET(SSKPD_WM0_MASK_SNB, sskpd); wm[1] = REG_FIELD_GET(SSKPD_WM1_MASK_SNB, sskpd); wm[2] = REG_FIELD_GET(SSKPD_WM2_MASK_SNB, sskpd); wm[3] = REG_FIELD_GET(SSKPD_WM3_MASK_SNB, sskpd); } else if (DISPLAY_VER(dev_priv) >= 5) { u32 mltr = intel_uncore_read(uncore, MLTR_ILK); /* ILK primary LP0 latency is 700 ns */ wm[0] = 7; wm[1] = REG_FIELD_GET(MLTR_WM1_MASK, mltr); wm[2] = REG_FIELD_GET(MLTR_WM2_MASK, mltr); } else { MISSING_CASE(INTEL_DEVID(dev_priv)); } } static void intel_fixup_spr_wm_latency(struct drm_i915_private *dev_priv, u16 wm[5]) { /* ILK sprite LP0 latency is 1300 ns */ if (DISPLAY_VER(dev_priv) == 5) wm[0] = 13; } static void intel_fixup_cur_wm_latency(struct drm_i915_private *dev_priv, u16 wm[5]) { /* ILK cursor LP0 latency is 1300 ns */ if (DISPLAY_VER(dev_priv) == 5) wm[0] = 13; } int ilk_wm_max_level(const struct drm_i915_private *dev_priv) { /* how many WM levels are we expecting */ if (HAS_HW_SAGV_WM(dev_priv)) return 5; else if (DISPLAY_VER(dev_priv) >= 9) return 7; else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) return 4; else if (DISPLAY_VER(dev_priv) >= 6) return 3; else return 2; } static void intel_print_wm_latency(struct drm_i915_private *dev_priv, const char *name, const u16 wm[]) { int level, max_level = ilk_wm_max_level(dev_priv); for (level = 0; level <= max_level; level++) { unsigned int latency = wm[level]; if (latency == 0) { drm_dbg_kms(&dev_priv->drm, "%s WM%d latency not provided\n", name, level); continue; } /* * - latencies are in us on gen9. * - before then, WM1+ latency values are in 0.5us units */ if (DISPLAY_VER(dev_priv) >= 9) latency *= 10; else if (level > 0) latency *= 5; drm_dbg_kms(&dev_priv->drm, "%s WM%d latency %u (%u.%u usec)\n", name, level, wm[level], latency / 10, latency % 10); } } static bool ilk_increase_wm_latency(struct drm_i915_private *dev_priv, u16 wm[5], u16 min) { int level, max_level = ilk_wm_max_level(dev_priv); if (wm[0] >= min) return false; wm[0] = max(wm[0], min); for (level = 1; level <= max_level; level++) wm[level] = max_t(u16, wm[level], DIV_ROUND_UP(min, 5)); return true; } static void snb_wm_latency_quirk(struct drm_i915_private *dev_priv) { bool changed; /* * The BIOS provided WM memory latency values are often * inadequate for high resolution displays. Adjust them. */ changed = ilk_increase_wm_latency(dev_priv, dev_priv->wm.pri_latency, 12); changed |= ilk_increase_wm_latency(dev_priv, dev_priv->wm.spr_latency, 12); changed |= ilk_increase_wm_latency(dev_priv, dev_priv->wm.cur_latency, 12); if (!changed) return; drm_dbg_kms(&dev_priv->drm, "WM latency values increased to avoid potential underruns\n"); intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency); intel_print_wm_latency(dev_priv, "Sprite", dev_priv->wm.spr_latency); intel_print_wm_latency(dev_priv, "Cursor", dev_priv->wm.cur_latency); } static void snb_wm_lp3_irq_quirk(struct drm_i915_private *dev_priv) { /* * On some SNB machines (Thinkpad X220 Tablet at least) * LP3 usage can cause vblank interrupts to be lost. * The DEIIR bit will go high but it looks like the CPU * never gets interrupted. * * It's not clear whether other interrupt source could * be affected or if this is somehow limited to vblank * interrupts only. To play it safe we disable LP3 * watermarks entirely. */ if (dev_priv->wm.pri_latency[3] == 0 && dev_priv->wm.spr_latency[3] == 0 && dev_priv->wm.cur_latency[3] == 0) return; dev_priv->wm.pri_latency[3] = 0; dev_priv->wm.spr_latency[3] = 0; dev_priv->wm.cur_latency[3] = 0; drm_dbg_kms(&dev_priv->drm, "LP3 watermarks disabled due to potential for lost interrupts\n"); intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency); intel_print_wm_latency(dev_priv, "Sprite", dev_priv->wm.spr_latency); intel_print_wm_latency(dev_priv, "Cursor", dev_priv->wm.cur_latency); } static void ilk_setup_wm_latency(struct drm_i915_private *dev_priv) { intel_read_wm_latency(dev_priv, dev_priv->wm.pri_latency); memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency, sizeof(dev_priv->wm.pri_latency)); memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency, sizeof(dev_priv->wm.pri_latency)); intel_fixup_spr_wm_latency(dev_priv, dev_priv->wm.spr_latency); intel_fixup_cur_wm_latency(dev_priv, dev_priv->wm.cur_latency); intel_print_wm_latency(dev_priv, "Primary", dev_priv->wm.pri_latency); intel_print_wm_latency(dev_priv, "Sprite", dev_priv->wm.spr_latency); intel_print_wm_latency(dev_priv, "Cursor", dev_priv->wm.cur_latency); if (DISPLAY_VER(dev_priv) == 6) { snb_wm_latency_quirk(dev_priv); snb_wm_lp3_irq_quirk(dev_priv); } } static void skl_setup_wm_latency(struct drm_i915_private *dev_priv) { intel_read_wm_latency(dev_priv, dev_priv->wm.skl_latency); intel_print_wm_latency(dev_priv, "Gen9 Plane", dev_priv->wm.skl_latency); } static bool ilk_validate_pipe_wm(const struct drm_i915_private *dev_priv, struct intel_pipe_wm *pipe_wm) { /* LP0 watermark maximums depend on this pipe alone */ const struct intel_wm_config config = { .num_pipes_active = 1, .sprites_enabled = pipe_wm->sprites_enabled, .sprites_scaled = pipe_wm->sprites_scaled, }; struct ilk_wm_maximums max; /* LP0 watermarks always use 1/2 DDB partitioning */ ilk_compute_wm_maximums(dev_priv, 0, &config, INTEL_DDB_PART_1_2, &max); /* At least LP0 must be valid */ if (!ilk_validate_wm_level(0, &max, &pipe_wm->wm[0])) { drm_dbg_kms(&dev_priv->drm, "LP0 watermark invalid\n"); return false; } return true; } /* Compute new watermarks for the pipe */ static int ilk_compute_pipe_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); struct intel_pipe_wm *pipe_wm; struct intel_plane *plane; const struct intel_plane_state *plane_state; const struct intel_plane_state *pristate = NULL; const struct intel_plane_state *sprstate = NULL; const struct intel_plane_state *curstate = NULL; int level, max_level = ilk_wm_max_level(dev_priv), usable_level; struct ilk_wm_maximums max; pipe_wm = &crtc_state->wm.ilk.optimal; intel_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) { if (plane->base.type == DRM_PLANE_TYPE_PRIMARY) pristate = plane_state; else if (plane->base.type == DRM_PLANE_TYPE_OVERLAY) sprstate = plane_state; else if (plane->base.type == DRM_PLANE_TYPE_CURSOR) curstate = plane_state; } pipe_wm->pipe_enabled = crtc_state->hw.active; pipe_wm->sprites_enabled = crtc_state->active_planes & BIT(PLANE_SPRITE0); pipe_wm->sprites_scaled = crtc_state->scaled_planes & BIT(PLANE_SPRITE0); usable_level = max_level; /* ILK/SNB: LP2+ watermarks only w/o sprites */ if (DISPLAY_VER(dev_priv) <= 6 && pipe_wm->sprites_enabled) usable_level = 1; /* ILK/SNB/IVB: LP1+ watermarks only w/o scaling */ if (pipe_wm->sprites_scaled) usable_level = 0; memset(&pipe_wm->wm, 0, sizeof(pipe_wm->wm)); ilk_compute_wm_level(dev_priv, crtc, 0, crtc_state, pristate, sprstate, curstate, &pipe_wm->wm[0]); if (!ilk_validate_pipe_wm(dev_priv, pipe_wm)) return -EINVAL; ilk_compute_wm_reg_maximums(dev_priv, 1, &max); for (level = 1; level <= usable_level; level++) { struct intel_wm_level *wm = &pipe_wm->wm[level]; ilk_compute_wm_level(dev_priv, crtc, level, crtc_state, pristate, sprstate, curstate, wm); /* * Disable any watermark level that exceeds the * register maximums since such watermarks are * always invalid. */ if (!ilk_validate_wm_level(level, &max, wm)) { memset(wm, 0, sizeof(*wm)); break; } } return 0; } /* * Build a set of 'intermediate' watermark values that satisfy both the old * state and the new state. These can be programmed to the hardware * immediately. */ static int ilk_compute_intermediate_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); const struct intel_crtc_state *old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc); struct intel_pipe_wm *a = &new_crtc_state->wm.ilk.intermediate; const struct intel_pipe_wm *b = &old_crtc_state->wm.ilk.optimal; int level, max_level = ilk_wm_max_level(dev_priv); /* * Start with the final, target watermarks, then combine with the * currently active watermarks to get values that are safe both before * and after the vblank. */ *a = new_crtc_state->wm.ilk.optimal; if (!new_crtc_state->hw.active || drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi) || state->skip_intermediate_wm) return 0; a->pipe_enabled |= b->pipe_enabled; a->sprites_enabled |= b->sprites_enabled; a->sprites_scaled |= b->sprites_scaled; for (level = 0; level <= max_level; level++) { struct intel_wm_level *a_wm = &a->wm[level]; const struct intel_wm_level *b_wm = &b->wm[level]; a_wm->enable &= b_wm->enable; a_wm->pri_val = max(a_wm->pri_val, b_wm->pri_val); a_wm->spr_val = max(a_wm->spr_val, b_wm->spr_val); a_wm->cur_val = max(a_wm->cur_val, b_wm->cur_val); a_wm->fbc_val = max(a_wm->fbc_val, b_wm->fbc_val); } /* * We need to make sure that these merged watermark values are * actually a valid configuration themselves. If they're not, * there's no safe way to transition from the old state to * the new state, so we need to fail the atomic transaction. */ if (!ilk_validate_pipe_wm(dev_priv, a)) return -EINVAL; /* * If our intermediate WM are identical to the final WM, then we can * omit the post-vblank programming; only update if it's different. */ if (memcmp(a, &new_crtc_state->wm.ilk.optimal, sizeof(*a)) != 0) new_crtc_state->wm.need_postvbl_update = true; return 0; } /* * Merge the watermarks from all active pipes for a specific level. */ static void ilk_merge_wm_level(struct drm_i915_private *dev_priv, int level, struct intel_wm_level *ret_wm) { const struct intel_crtc *crtc; ret_wm->enable = true; for_each_intel_crtc(&dev_priv->drm, crtc) { const struct intel_pipe_wm *active = &crtc->wm.active.ilk; const struct intel_wm_level *wm = &active->wm[level]; if (!active->pipe_enabled) continue; /* * The watermark values may have been used in the past, * so we must maintain them in the registers for some * time even if the level is now disabled. */ if (!wm->enable) ret_wm->enable = false; ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val); ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val); ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val); ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val); } } /* * Merge all low power watermarks for all active pipes. */ static void ilk_wm_merge(struct drm_i915_private *dev_priv, const struct intel_wm_config *config, const struct ilk_wm_maximums *max, struct intel_pipe_wm *merged) { int level, max_level = ilk_wm_max_level(dev_priv); int last_enabled_level = max_level; /* ILK/SNB/IVB: LP1+ watermarks only w/ single pipe */ if ((DISPLAY_VER(dev_priv) <= 6 || IS_IVYBRIDGE(dev_priv)) && config->num_pipes_active > 1) last_enabled_level = 0; /* ILK: FBC WM must be disabled always */ merged->fbc_wm_enabled = DISPLAY_VER(dev_priv) >= 6; /* merge each WM1+ level */ for (level = 1; level <= max_level; level++) { struct intel_wm_level *wm = &merged->wm[level]; ilk_merge_wm_level(dev_priv, level, wm); if (level > last_enabled_level) wm->enable = false; else if (!ilk_validate_wm_level(level, max, wm)) /* make sure all following levels get disabled */ last_enabled_level = level - 1; /* * The spec says it is preferred to disable * FBC WMs instead of disabling a WM level. */ if (wm->fbc_val > max->fbc) { if (wm->enable) merged->fbc_wm_enabled = false; wm->fbc_val = 0; } } /* ILK: LP2+ must be disabled when FBC WM is disabled but FBC enabled */ if (DISPLAY_VER(dev_priv) == 5 && HAS_FBC(dev_priv) && dev_priv->params.enable_fbc && !merged->fbc_wm_enabled) { for (level = 2; level <= max_level; level++) { struct intel_wm_level *wm = &merged->wm[level]; wm->enable = false; } } } static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm) { /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */ return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable); } /* The value we need to program into the WM_LPx latency field */ static unsigned int ilk_wm_lp_latency(struct drm_i915_private *dev_priv, int level) { if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) return 2 * level; else return dev_priv->wm.pri_latency[level]; } static void ilk_compute_wm_results(struct drm_i915_private *dev_priv, const struct intel_pipe_wm *merged, enum intel_ddb_partitioning partitioning, struct ilk_wm_values *results) { struct intel_crtc *crtc; int level, wm_lp; results->enable_fbc_wm = merged->fbc_wm_enabled; results->partitioning = partitioning; /* LP1+ register values */ for (wm_lp = 1; wm_lp <= 3; wm_lp++) { const struct intel_wm_level *r; level = ilk_wm_lp_to_level(wm_lp, merged); r = &merged->wm[level]; /* * Maintain the watermark values even if the level is * disabled. Doing otherwise could cause underruns. */ results->wm_lp[wm_lp - 1] = WM_LP_LATENCY(ilk_wm_lp_latency(dev_priv, level)) | WM_LP_PRIMARY(r->pri_val) | WM_LP_CURSOR(r->cur_val); if (r->enable) results->wm_lp[wm_lp - 1] |= WM_LP_ENABLE; if (DISPLAY_VER(dev_priv) >= 8) results->wm_lp[wm_lp - 1] |= WM_LP_FBC_BDW(r->fbc_val); else results->wm_lp[wm_lp - 1] |= WM_LP_FBC_ILK(r->fbc_val); results->wm_lp_spr[wm_lp - 1] = WM_LP_SPRITE(r->spr_val); /* * Always set WM_LP_SPRITE_EN when spr_val != 0, even if the * level is disabled. Doing otherwise could cause underruns. */ if (DISPLAY_VER(dev_priv) <= 6 && r->spr_val) { drm_WARN_ON(&dev_priv->drm, wm_lp != 1); results->wm_lp_spr[wm_lp - 1] |= WM_LP_SPRITE_ENABLE; } } /* LP0 register values */ for_each_intel_crtc(&dev_priv->drm, crtc) { enum pipe pipe = crtc->pipe; const struct intel_pipe_wm *pipe_wm = &crtc->wm.active.ilk; const struct intel_wm_level *r = &pipe_wm->wm[0]; if (drm_WARN_ON(&dev_priv->drm, !r->enable)) continue; results->wm_pipe[pipe] = WM0_PIPE_PRIMARY(r->pri_val) | WM0_PIPE_SPRITE(r->spr_val) | WM0_PIPE_CURSOR(r->cur_val); } } /* Find the result with the highest level enabled. Check for enable_fbc_wm in * case both are at the same level. Prefer r1 in case they're the same. */ static struct intel_pipe_wm * ilk_find_best_result(struct drm_i915_private *dev_priv, struct intel_pipe_wm *r1, struct intel_pipe_wm *r2) { int level, max_level = ilk_wm_max_level(dev_priv); int level1 = 0, level2 = 0; for (level = 1; level <= max_level; level++) { if (r1->wm[level].enable) level1 = level; if (r2->wm[level].enable) level2 = level; } if (level1 == level2) { if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled) return r2; else return r1; } else if (level1 > level2) { return r1; } else { return r2; } } /* dirty bits used to track which watermarks need changes */ #define WM_DIRTY_PIPE(pipe) (1 << (pipe)) #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp))) #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3)) #define WM_DIRTY_FBC (1 << 24) #define WM_DIRTY_DDB (1 << 25) static unsigned int ilk_compute_wm_dirty(struct drm_i915_private *dev_priv, const struct ilk_wm_values *old, const struct ilk_wm_values *new) { unsigned int dirty = 0; enum pipe pipe; int wm_lp; for_each_pipe(dev_priv, pipe) { if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) { dirty |= WM_DIRTY_PIPE(pipe); /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } } if (old->enable_fbc_wm != new->enable_fbc_wm) { dirty |= WM_DIRTY_FBC; /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } if (old->partitioning != new->partitioning) { dirty |= WM_DIRTY_DDB; /* Must disable LP1+ watermarks too */ dirty |= WM_DIRTY_LP_ALL; } /* LP1+ watermarks already deemed dirty, no need to continue */ if (dirty & WM_DIRTY_LP_ALL) return dirty; /* Find the lowest numbered LP1+ watermark in need of an update... */ for (wm_lp = 1; wm_lp <= 3; wm_lp++) { if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] || old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1]) break; } /* ...and mark it and all higher numbered LP1+ watermarks as dirty */ for (; wm_lp <= 3; wm_lp++) dirty |= WM_DIRTY_LP(wm_lp); return dirty; } static bool _ilk_disable_lp_wm(struct drm_i915_private *dev_priv, unsigned int dirty) { struct ilk_wm_values *previous = &dev_priv->wm.hw; bool changed = false; if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] & WM_LP_ENABLE) { previous->wm_lp[2] &= ~WM_LP_ENABLE; intel_uncore_write(&dev_priv->uncore, WM3_LP_ILK, previous->wm_lp[2]); changed = true; } if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] & WM_LP_ENABLE) { previous->wm_lp[1] &= ~WM_LP_ENABLE; intel_uncore_write(&dev_priv->uncore, WM2_LP_ILK, previous->wm_lp[1]); changed = true; } if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] & WM_LP_ENABLE) { previous->wm_lp[0] &= ~WM_LP_ENABLE; intel_uncore_write(&dev_priv->uncore, WM1_LP_ILK, previous->wm_lp[0]); changed = true; } /* * Don't touch WM_LP_SPRITE_ENABLE here. * Doing so could cause underruns. */ return changed; } /* * The spec says we shouldn't write when we don't need, because every write * causes WMs to be re-evaluated, expending some power. */ static void ilk_write_wm_values(struct drm_i915_private *dev_priv, struct ilk_wm_values *results) { struct ilk_wm_values *previous = &dev_priv->wm.hw; unsigned int dirty; u32 val; dirty = ilk_compute_wm_dirty(dev_priv, previous, results); if (!dirty) return; _ilk_disable_lp_wm(dev_priv, dirty); if (dirty & WM_DIRTY_PIPE(PIPE_A)) intel_uncore_write(&dev_priv->uncore, WM0_PIPE_ILK(PIPE_A), results->wm_pipe[0]); if (dirty & WM_DIRTY_PIPE(PIPE_B)) intel_uncore_write(&dev_priv->uncore, WM0_PIPE_ILK(PIPE_B), results->wm_pipe[1]); if (dirty & WM_DIRTY_PIPE(PIPE_C)) intel_uncore_write(&dev_priv->uncore, WM0_PIPE_ILK(PIPE_C), results->wm_pipe[2]); if (dirty & WM_DIRTY_DDB) { if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) { val = intel_uncore_read(&dev_priv->uncore, WM_MISC); if (results->partitioning == INTEL_DDB_PART_1_2) val &= ~WM_MISC_DATA_PARTITION_5_6; else val |= WM_MISC_DATA_PARTITION_5_6; intel_uncore_write(&dev_priv->uncore, WM_MISC, val); } else { val = intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL2); if (results->partitioning == INTEL_DDB_PART_1_2) val &= ~DISP_DATA_PARTITION_5_6; else val |= DISP_DATA_PARTITION_5_6; intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL2, val); } } if (dirty & WM_DIRTY_FBC) { val = intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL); if (results->enable_fbc_wm) val &= ~DISP_FBC_WM_DIS; else val |= DISP_FBC_WM_DIS; intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, val); } if (dirty & WM_DIRTY_LP(1) && previous->wm_lp_spr[0] != results->wm_lp_spr[0]) intel_uncore_write(&dev_priv->uncore, WM1S_LP_ILK, results->wm_lp_spr[0]); if (DISPLAY_VER(dev_priv) >= 7) { if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1]) intel_uncore_write(&dev_priv->uncore, WM2S_LP_IVB, results->wm_lp_spr[1]); if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2]) intel_uncore_write(&dev_priv->uncore, WM3S_LP_IVB, results->wm_lp_spr[2]); } if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != results->wm_lp[0]) intel_uncore_write(&dev_priv->uncore, WM1_LP_ILK, results->wm_lp[0]); if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != results->wm_lp[1]) intel_uncore_write(&dev_priv->uncore, WM2_LP_ILK, results->wm_lp[1]); if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != results->wm_lp[2]) intel_uncore_write(&dev_priv->uncore, WM3_LP_ILK, results->wm_lp[2]); dev_priv->wm.hw = *results; } bool ilk_disable_lp_wm(struct drm_i915_private *dev_priv) { return _ilk_disable_lp_wm(dev_priv, WM_DIRTY_LP_ALL); } u8 intel_enabled_dbuf_slices_mask(struct drm_i915_private *dev_priv) { u8 enabled_slices = 0; enum dbuf_slice slice; for_each_dbuf_slice(dev_priv, slice) { if (intel_uncore_read(&dev_priv->uncore, DBUF_CTL_S(slice)) & DBUF_POWER_STATE) enabled_slices |= BIT(slice); } return enabled_slices; } /* * FIXME: We still don't have the proper code detect if we need to apply the WA, * so assume we'll always need it in order to avoid underruns. */ static bool skl_needs_memory_bw_wa(struct drm_i915_private *dev_priv) { return DISPLAY_VER(dev_priv) == 9; } static bool intel_has_sagv(struct drm_i915_private *dev_priv) { return DISPLAY_VER(dev_priv) >= 9 && !IS_LP(dev_priv) && dev_priv->sagv_status != I915_SAGV_NOT_CONTROLLED; } static u32 intel_sagv_block_time(struct drm_i915_private *dev_priv) { if (DISPLAY_VER(dev_priv) >= 12) { u32 val = 0; int ret; ret = snb_pcode_read(&dev_priv->uncore, GEN12_PCODE_READ_SAGV_BLOCK_TIME_US, &val, NULL); if (ret) { drm_dbg_kms(&dev_priv->drm, "Couldn't read SAGV block time!\n"); return 0; } return val; } else if (DISPLAY_VER(dev_priv) == 11) { return 10; } else if (DISPLAY_VER(dev_priv) == 9 && !IS_LP(dev_priv)) { return 30; } else { return 0; } } static void intel_sagv_init(struct drm_i915_private *i915) { if (!intel_has_sagv(i915)) i915->sagv_status = I915_SAGV_NOT_CONTROLLED; /* * Probe to see if we have working SAGV control. * For icl+ this was already determined by intel_bw_init_hw(). */ if (DISPLAY_VER(i915) < 11) skl_sagv_disable(i915); drm_WARN_ON(&i915->drm, i915->sagv_status == I915_SAGV_UNKNOWN); i915->sagv_block_time_us = intel_sagv_block_time(i915); drm_dbg_kms(&i915->drm, "SAGV supported: %s, original SAGV block time: %u us\n", str_yes_no(intel_has_sagv(i915)), i915->sagv_block_time_us); /* avoid overflow when adding with wm0 latency/etc. */ if (drm_WARN(&i915->drm, i915->sagv_block_time_us > U16_MAX, "Excessive SAGV block time %u, ignoring\n", i915->sagv_block_time_us)) i915->sagv_block_time_us = 0; if (!intel_has_sagv(i915)) i915->sagv_block_time_us = 0; } /* * SAGV dynamically adjusts the system agent voltage and clock frequencies * depending on power and performance requirements. The display engine access * to system memory is blocked during the adjustment time. Because of the * blocking time, having this enabled can cause full system hangs and/or pipe * underruns if we don't meet all of the following requirements: * * - <= 1 pipe enabled * - All planes can enable watermarks for latencies >= SAGV engine block time * - We're not using an interlaced display configuration */ static void skl_sagv_enable(struct drm_i915_private *dev_priv) { int ret; if (!intel_has_sagv(dev_priv)) return; if (dev_priv->sagv_status == I915_SAGV_ENABLED) return; drm_dbg_kms(&dev_priv->drm, "Enabling SAGV\n"); ret = snb_pcode_write(&dev_priv->uncore, GEN9_PCODE_SAGV_CONTROL, GEN9_SAGV_ENABLE); /* We don't need to wait for SAGV when enabling */ /* * Some skl systems, pre-release machines in particular, * don't actually have SAGV. */ if (IS_SKYLAKE(dev_priv) && ret == -ENXIO) { drm_dbg(&dev_priv->drm, "No SAGV found on system, ignoring\n"); dev_priv->sagv_status = I915_SAGV_NOT_CONTROLLED; return; } else if (ret < 0) { drm_err(&dev_priv->drm, "Failed to enable SAGV\n"); return; } dev_priv->sagv_status = I915_SAGV_ENABLED; } static void skl_sagv_disable(struct drm_i915_private *dev_priv) { int ret; if (!intel_has_sagv(dev_priv)) return; if (dev_priv->sagv_status == I915_SAGV_DISABLED) return; drm_dbg_kms(&dev_priv->drm, "Disabling SAGV\n"); /* bspec says to keep retrying for at least 1 ms */ ret = skl_pcode_request(&dev_priv->uncore, GEN9_PCODE_SAGV_CONTROL, GEN9_SAGV_DISABLE, GEN9_SAGV_IS_DISABLED, GEN9_SAGV_IS_DISABLED, 1); /* * Some skl systems, pre-release machines in particular, * don't actually have SAGV. */ if (IS_SKYLAKE(dev_priv) && ret == -ENXIO) { drm_dbg(&dev_priv->drm, "No SAGV found on system, ignoring\n"); dev_priv->sagv_status = I915_SAGV_NOT_CONTROLLED; return; } else if (ret < 0) { drm_err(&dev_priv->drm, "Failed to disable SAGV (%d)\n", ret); return; } dev_priv->sagv_status = I915_SAGV_DISABLED; } static void skl_sagv_pre_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *i915 = to_i915(state->base.dev); const struct intel_bw_state *new_bw_state = intel_atomic_get_new_bw_state(state); if (!new_bw_state) return; if (!intel_can_enable_sagv(i915, new_bw_state)) skl_sagv_disable(i915); } static void skl_sagv_post_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *i915 = to_i915(state->base.dev); const struct intel_bw_state *new_bw_state = intel_atomic_get_new_bw_state(state); if (!new_bw_state) return; if (intel_can_enable_sagv(i915, new_bw_state)) skl_sagv_enable(i915); } static void icl_sagv_pre_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); const struct intel_bw_state *old_bw_state = intel_atomic_get_old_bw_state(state); const struct intel_bw_state *new_bw_state = intel_atomic_get_new_bw_state(state); u16 old_mask, new_mask; if (!new_bw_state) return; old_mask = old_bw_state->qgv_points_mask; new_mask = old_bw_state->qgv_points_mask | new_bw_state->qgv_points_mask; if (old_mask == new_mask) return; WARN_ON(!new_bw_state->base.changed); drm_dbg_kms(&dev_priv->drm, "Restricting QGV points: 0x%x -> 0x%x\n", old_mask, new_mask); /* * Restrict required qgv points before updating the configuration. * According to BSpec we can't mask and unmask qgv points at the same * time. Also masking should be done before updating the configuration * and unmasking afterwards. */ icl_pcode_restrict_qgv_points(dev_priv, new_mask); } static void icl_sagv_post_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); const struct intel_bw_state *old_bw_state = intel_atomic_get_old_bw_state(state); const struct intel_bw_state *new_bw_state = intel_atomic_get_new_bw_state(state); u16 old_mask, new_mask; if (!new_bw_state) return; old_mask = old_bw_state->qgv_points_mask | new_bw_state->qgv_points_mask; new_mask = new_bw_state->qgv_points_mask; if (old_mask == new_mask) return; WARN_ON(!new_bw_state->base.changed); drm_dbg_kms(&dev_priv->drm, "Relaxing QGV points: 0x%x -> 0x%x\n", old_mask, new_mask); /* * Allow required qgv points after updating the configuration. * According to BSpec we can't mask and unmask qgv points at the same * time. Also masking should be done before updating the configuration * and unmasking afterwards. */ icl_pcode_restrict_qgv_points(dev_priv, new_mask); } void intel_sagv_pre_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *i915 = to_i915(state->base.dev); /* * Just return if we can't control SAGV or don't have it. * This is different from situation when we have SAGV but just can't * afford it due to DBuf limitation - in case if SAGV is completely * disabled in a BIOS, we are not even allowed to send a PCode request, * as it will throw an error. So have to check it here. */ if (!intel_has_sagv(i915)) return; if (DISPLAY_VER(i915) >= 11) icl_sagv_pre_plane_update(state); else skl_sagv_pre_plane_update(state); } void intel_sagv_post_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *i915 = to_i915(state->base.dev); /* * Just return if we can't control SAGV or don't have it. * This is different from situation when we have SAGV but just can't * afford it due to DBuf limitation - in case if SAGV is completely * disabled in a BIOS, we are not even allowed to send a PCode request, * as it will throw an error. So have to check it here. */ if (!intel_has_sagv(i915)) return; if (DISPLAY_VER(i915) >= 11) icl_sagv_post_plane_update(state); else skl_sagv_post_plane_update(state); } static bool skl_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); enum plane_id plane_id; int max_level = INT_MAX; if (!intel_has_sagv(dev_priv)) return false; if (!crtc_state->hw.active) return true; if (crtc_state->hw.pipe_mode.flags & DRM_MODE_FLAG_INTERLACE) return false; for_each_plane_id_on_crtc(crtc, plane_id) { const struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; int level; /* Skip this plane if it's not enabled */ if (!wm->wm[0].enable) continue; /* Find the highest enabled wm level for this plane */ for (level = ilk_wm_max_level(dev_priv); !wm->wm[level].enable; --level) { } /* Highest common enabled wm level for all planes */ max_level = min(level, max_level); } /* No enabled planes? */ if (max_level == INT_MAX) return true; for_each_plane_id_on_crtc(crtc, plane_id) { const struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; /* * All enabled planes must have enabled a common wm level that * can tolerate memory latencies higher than sagv_block_time_us */ if (wm->wm[0].enable && !wm->wm[max_level].can_sagv) return false; } return true; } static bool tgl_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); enum plane_id plane_id; if (!crtc_state->hw.active) return true; for_each_plane_id_on_crtc(crtc, plane_id) { const struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; if (wm->wm[0].enable && !wm->sagv.wm0.enable) return false; } return true; } static bool intel_crtc_can_enable_sagv(const struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); if (DISPLAY_VER(dev_priv) >= 12) return tgl_crtc_can_enable_sagv(crtc_state); else return skl_crtc_can_enable_sagv(crtc_state); } bool intel_can_enable_sagv(struct drm_i915_private *dev_priv, const struct intel_bw_state *bw_state) { if (DISPLAY_VER(dev_priv) < 11 && bw_state->active_pipes && !is_power_of_2(bw_state->active_pipes)) return false; return bw_state->pipe_sagv_reject == 0; } static int intel_compute_sagv_mask(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); int ret; struct intel_crtc *crtc; struct intel_crtc_state *new_crtc_state; struct intel_bw_state *new_bw_state = NULL; const struct intel_bw_state *old_bw_state = NULL; int i; for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { new_bw_state = intel_atomic_get_bw_state(state); if (IS_ERR(new_bw_state)) return PTR_ERR(new_bw_state); old_bw_state = intel_atomic_get_old_bw_state(state); if (intel_crtc_can_enable_sagv(new_crtc_state)) new_bw_state->pipe_sagv_reject &= ~BIT(crtc->pipe); else new_bw_state->pipe_sagv_reject |= BIT(crtc->pipe); } if (!new_bw_state) return 0; new_bw_state->active_pipes = intel_calc_active_pipes(state, old_bw_state->active_pipes); if (new_bw_state->active_pipes != old_bw_state->active_pipes) { ret = intel_atomic_lock_global_state(&new_bw_state->base); if (ret) return ret; } if (intel_can_enable_sagv(dev_priv, new_bw_state) != intel_can_enable_sagv(dev_priv, old_bw_state)) { ret = intel_atomic_serialize_global_state(&new_bw_state->base); if (ret) return ret; } else if (new_bw_state->pipe_sagv_reject != old_bw_state->pipe_sagv_reject) { ret = intel_atomic_lock_global_state(&new_bw_state->base); if (ret) return ret; } for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { struct skl_pipe_wm *pipe_wm = &new_crtc_state->wm.skl.optimal; /* * We store use_sagv_wm in the crtc state rather than relying on * that bw state since we have no convenient way to get at the * latter from the plane commit hooks (especially in the legacy * cursor case) */ pipe_wm->use_sagv_wm = !HAS_HW_SAGV_WM(dev_priv) && DISPLAY_VER(dev_priv) >= 12 && intel_can_enable_sagv(dev_priv, new_bw_state); } return 0; } static u16 skl_ddb_entry_init(struct skl_ddb_entry *entry, u16 start, u16 end) { entry->start = start; entry->end = end; return end; } static int intel_dbuf_slice_size(struct drm_i915_private *dev_priv) { return INTEL_INFO(dev_priv)->display.dbuf.size / hweight8(INTEL_INFO(dev_priv)->display.dbuf.slice_mask); } static void skl_ddb_entry_for_slices(struct drm_i915_private *dev_priv, u8 slice_mask, struct skl_ddb_entry *ddb) { int slice_size = intel_dbuf_slice_size(dev_priv); if (!slice_mask) { ddb->start = 0; ddb->end = 0; return; } ddb->start = (ffs(slice_mask) - 1) * slice_size; ddb->end = fls(slice_mask) * slice_size; WARN_ON(ddb->start >= ddb->end); WARN_ON(ddb->end > INTEL_INFO(dev_priv)->display.dbuf.size); } static unsigned int mbus_ddb_offset(struct drm_i915_private *i915, u8 slice_mask) { struct skl_ddb_entry ddb; if (slice_mask & (BIT(DBUF_S1) | BIT(DBUF_S2))) slice_mask = BIT(DBUF_S1); else if (slice_mask & (BIT(DBUF_S3) | BIT(DBUF_S4))) slice_mask = BIT(DBUF_S3); skl_ddb_entry_for_slices(i915, slice_mask, &ddb); return ddb.start; } u32 skl_ddb_dbuf_slice_mask(struct drm_i915_private *dev_priv, const struct skl_ddb_entry *entry) { int slice_size = intel_dbuf_slice_size(dev_priv); enum dbuf_slice start_slice, end_slice; u8 slice_mask = 0; if (!skl_ddb_entry_size(entry)) return 0; start_slice = entry->start / slice_size; end_slice = (entry->end - 1) / slice_size; /* * Per plane DDB entry can in a really worst case be on multiple slices * but single entry is anyway contigious. */ while (start_slice <= end_slice) { slice_mask |= BIT(start_slice); start_slice++; } return slice_mask; } static unsigned int intel_crtc_ddb_weight(const struct intel_crtc_state *crtc_state) { const struct drm_display_mode *pipe_mode = &crtc_state->hw.pipe_mode; int hdisplay, vdisplay; if (!crtc_state->hw.active) return 0; /* * Watermark/ddb requirement highly depends upon width of the * framebuffer, So instead of allocating DDB equally among pipes * distribute DDB based on resolution/width of the display. */ drm_mode_get_hv_timing(pipe_mode, &hdisplay, &vdisplay); return hdisplay; } static void intel_crtc_dbuf_weights(const struct intel_dbuf_state *dbuf_state, enum pipe for_pipe, unsigned int *weight_start, unsigned int *weight_end, unsigned int *weight_total) { struct drm_i915_private *dev_priv = to_i915(dbuf_state->base.state->base.dev); enum pipe pipe; *weight_start = 0; *weight_end = 0; *weight_total = 0; for_each_pipe(dev_priv, pipe) { int weight = dbuf_state->weight[pipe]; /* * Do not account pipes using other slice sets * luckily as of current BSpec slice sets do not partially * intersect(pipes share either same one slice or same slice set * i.e no partial intersection), so it is enough to check for * equality for now. */ if (dbuf_state->slices[pipe] != dbuf_state->slices[for_pipe]) continue; *weight_total += weight; if (pipe < for_pipe) { *weight_start += weight; *weight_end += weight; } else if (pipe == for_pipe) { *weight_end += weight; } } } static int skl_crtc_allocate_ddb(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); unsigned int weight_total, weight_start, weight_end; const struct intel_dbuf_state *old_dbuf_state = intel_atomic_get_old_dbuf_state(state); struct intel_dbuf_state *new_dbuf_state = intel_atomic_get_new_dbuf_state(state); struct intel_crtc_state *crtc_state; struct skl_ddb_entry ddb_slices; enum pipe pipe = crtc->pipe; unsigned int mbus_offset = 0; u32 ddb_range_size; u32 dbuf_slice_mask; u32 start, end; int ret; if (new_dbuf_state->weight[pipe] == 0) { skl_ddb_entry_init(&new_dbuf_state->ddb[pipe], 0, 0); goto out; } dbuf_slice_mask = new_dbuf_state->slices[pipe]; skl_ddb_entry_for_slices(dev_priv, dbuf_slice_mask, &ddb_slices); mbus_offset = mbus_ddb_offset(dev_priv, dbuf_slice_mask); ddb_range_size = skl_ddb_entry_size(&ddb_slices); intel_crtc_dbuf_weights(new_dbuf_state, pipe, &weight_start, &weight_end, &weight_total); start = ddb_range_size * weight_start / weight_total; end = ddb_range_size * weight_end / weight_total; skl_ddb_entry_init(&new_dbuf_state->ddb[pipe], ddb_slices.start - mbus_offset + start, ddb_slices.start - mbus_offset + end); out: if (old_dbuf_state->slices[pipe] == new_dbuf_state->slices[pipe] && skl_ddb_entry_equal(&old_dbuf_state->ddb[pipe], &new_dbuf_state->ddb[pipe])) return 0; ret = intel_atomic_lock_global_state(&new_dbuf_state->base); if (ret) return ret; crtc_state = intel_atomic_get_crtc_state(&state->base, crtc); if (IS_ERR(crtc_state)) return PTR_ERR(crtc_state); /* * Used for checking overlaps, so we need absolute * offsets instead of MBUS relative offsets. */ crtc_state->wm.skl.ddb.start = mbus_offset + new_dbuf_state->ddb[pipe].start; crtc_state->wm.skl.ddb.end = mbus_offset + new_dbuf_state->ddb[pipe].end; drm_dbg_kms(&dev_priv->drm, "[CRTC:%d:%s] dbuf slices 0x%x -> 0x%x, ddb (%d - %d) -> (%d - %d), active pipes 0x%x -> 0x%x\n", crtc->base.base.id, crtc->base.name, old_dbuf_state->slices[pipe], new_dbuf_state->slices[pipe], old_dbuf_state->ddb[pipe].start, old_dbuf_state->ddb[pipe].end, new_dbuf_state->ddb[pipe].start, new_dbuf_state->ddb[pipe].end, old_dbuf_state->active_pipes, new_dbuf_state->active_pipes); return 0; } static int skl_compute_wm_params(const struct intel_crtc_state *crtc_state, int width, const struct drm_format_info *format, u64 modifier, unsigned int rotation, u32 plane_pixel_rate, struct skl_wm_params *wp, int color_plane); static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state, struct intel_plane *plane, int level, unsigned int latency, const struct skl_wm_params *wp, const struct skl_wm_level *result_prev, struct skl_wm_level *result /* out */); static unsigned int skl_cursor_allocation(const struct intel_crtc_state *crtc_state, int num_active) { struct intel_plane *plane = to_intel_plane(crtc_state->uapi.crtc->cursor); struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); int level, max_level = ilk_wm_max_level(dev_priv); struct skl_wm_level wm = {}; int ret, min_ddb_alloc = 0; struct skl_wm_params wp; ret = skl_compute_wm_params(crtc_state, 256, drm_format_info(DRM_FORMAT_ARGB8888), DRM_FORMAT_MOD_LINEAR, DRM_MODE_ROTATE_0, crtc_state->pixel_rate, &wp, 0); drm_WARN_ON(&dev_priv->drm, ret); for (level = 0; level <= max_level; level++) { unsigned int latency = dev_priv->wm.skl_latency[level]; skl_compute_plane_wm(crtc_state, plane, level, latency, &wp, &wm, &wm); if (wm.min_ddb_alloc == U16_MAX) break; min_ddb_alloc = wm.min_ddb_alloc; } return max(num_active == 1 ? 32 : 8, min_ddb_alloc); } static void skl_ddb_entry_init_from_hw(struct skl_ddb_entry *entry, u32 reg) { skl_ddb_entry_init(entry, REG_FIELD_GET(PLANE_BUF_START_MASK, reg), REG_FIELD_GET(PLANE_BUF_END_MASK, reg)); if (entry->end) entry->end++; } static void skl_ddb_get_hw_plane_state(struct drm_i915_private *dev_priv, const enum pipe pipe, const enum plane_id plane_id, struct skl_ddb_entry *ddb, struct skl_ddb_entry *ddb_y) { u32 val; /* Cursor doesn't support NV12/planar, so no extra calculation needed */ if (plane_id == PLANE_CURSOR) { val = intel_uncore_read(&dev_priv->uncore, CUR_BUF_CFG(pipe)); skl_ddb_entry_init_from_hw(ddb, val); return; } val = intel_uncore_read(&dev_priv->uncore, PLANE_BUF_CFG(pipe, plane_id)); skl_ddb_entry_init_from_hw(ddb, val); if (DISPLAY_VER(dev_priv) >= 11) return; val = intel_uncore_read(&dev_priv->uncore, PLANE_NV12_BUF_CFG(pipe, plane_id)); skl_ddb_entry_init_from_hw(ddb_y, val); } static void skl_pipe_ddb_get_hw_state(struct intel_crtc *crtc, struct skl_ddb_entry *ddb, struct skl_ddb_entry *ddb_y) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); enum intel_display_power_domain power_domain; enum pipe pipe = crtc->pipe; intel_wakeref_t wakeref; enum plane_id plane_id; power_domain = POWER_DOMAIN_PIPE(pipe); wakeref = intel_display_power_get_if_enabled(dev_priv, power_domain); if (!wakeref) return; for_each_plane_id_on_crtc(crtc, plane_id) skl_ddb_get_hw_plane_state(dev_priv, pipe, plane_id, &ddb[plane_id], &ddb_y[plane_id]); intel_display_power_put(dev_priv, power_domain, wakeref); } struct dbuf_slice_conf_entry { u8 active_pipes; u8 dbuf_mask[I915_MAX_PIPES]; bool join_mbus; }; /* * Table taken from Bspec 12716 * Pipes do have some preferred DBuf slice affinity, * plus there are some hardcoded requirements on how * those should be distributed for multipipe scenarios. * For more DBuf slices algorithm can get even more messy * and less readable, so decided to use a table almost * as is from BSpec itself - that way it is at least easier * to compare, change and check. */ static const struct dbuf_slice_conf_entry icl_allowed_dbufs[] = /* Autogenerated with igt/tools/intel_dbuf_map tool: */ { { .active_pipes = BIT(PIPE_A), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), }, }, { .active_pipes = BIT(PIPE_B), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_C), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), }, }, {} }; /* * Table taken from Bspec 49255 * Pipes do have some preferred DBuf slice affinity, * plus there are some hardcoded requirements on how * those should be distributed for multipipe scenarios. * For more DBuf slices algorithm can get even more messy * and less readable, so decided to use a table almost * as is from BSpec itself - that way it is at least easier * to compare, change and check. */ static const struct dbuf_slice_conf_entry tgl_allowed_dbufs[] = /* Autogenerated with igt/tools/intel_dbuf_map tool: */ { { .active_pipes = BIT(PIPE_A), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S2), [PIPE_B] = BIT(DBUF_S1), }, }, { .active_pipes = BIT(PIPE_C), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S2) | BIT(DBUF_S1), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_D), .dbuf_mask = { [PIPE_D] = BIT(DBUF_S2) | BIT(DBUF_S1), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_D] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_D), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1), [PIPE_D] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S1), [PIPE_D] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S1), [PIPE_D] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S1), [PIPE_C] = BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S2), }, }, {} }; static const struct dbuf_slice_conf_entry dg2_allowed_dbufs[] = { { .active_pipes = BIT(PIPE_A), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_C), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_D), .dbuf_mask = { [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_D), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S3), [PIPE_D] = BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3), [PIPE_D] = BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3), [PIPE_D] = BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1), [PIPE_B] = BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3), [PIPE_D] = BIT(DBUF_S4), }, }, {} }; static const struct dbuf_slice_conf_entry adlp_allowed_dbufs[] = { /* * Keep the join_mbus cases first so check_mbus_joined() * will prefer them over the !join_mbus cases. */ { .active_pipes = BIT(PIPE_A), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4), }, .join_mbus = true, }, { .active_pipes = BIT(PIPE_B), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S1) | BIT(DBUF_S2) | BIT(DBUF_S3) | BIT(DBUF_S4), }, .join_mbus = true, }, { .active_pipes = BIT(PIPE_A), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), }, .join_mbus = false, }, { .active_pipes = BIT(PIPE_B), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), }, .join_mbus = false, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_C), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), }, }, { .active_pipes = BIT(PIPE_D), .dbuf_mask = { [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_D), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, { .active_pipes = BIT(PIPE_A) | BIT(PIPE_B) | BIT(PIPE_C) | BIT(PIPE_D), .dbuf_mask = { [PIPE_A] = BIT(DBUF_S1) | BIT(DBUF_S2), [PIPE_B] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_C] = BIT(DBUF_S3) | BIT(DBUF_S4), [PIPE_D] = BIT(DBUF_S1) | BIT(DBUF_S2), }, }, {} }; static bool check_mbus_joined(u8 active_pipes, const struct dbuf_slice_conf_entry *dbuf_slices) { int i; for (i = 0; dbuf_slices[i].active_pipes != 0; i++) { if (dbuf_slices[i].active_pipes == active_pipes) return dbuf_slices[i].join_mbus; } return false; } static bool adlp_check_mbus_joined(u8 active_pipes) { return check_mbus_joined(active_pipes, adlp_allowed_dbufs); } static u8 compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus, const struct dbuf_slice_conf_entry *dbuf_slices) { int i; for (i = 0; dbuf_slices[i].active_pipes != 0; i++) { if (dbuf_slices[i].active_pipes == active_pipes && dbuf_slices[i].join_mbus == join_mbus) return dbuf_slices[i].dbuf_mask[pipe]; } return 0; } /* * This function finds an entry with same enabled pipe configuration and * returns correspondent DBuf slice mask as stated in BSpec for particular * platform. */ static u8 icl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus) { /* * FIXME: For ICL this is still a bit unclear as prev BSpec revision * required calculating "pipe ratio" in order to determine * if one or two slices can be used for single pipe configurations * as additional constraint to the existing table. * However based on recent info, it should be not "pipe ratio" * but rather ratio between pixel_rate and cdclk with additional * constants, so for now we are using only table until this is * clarified. Also this is the reason why crtc_state param is * still here - we will need it once those additional constraints * pop up. */ return compute_dbuf_slices(pipe, active_pipes, join_mbus, icl_allowed_dbufs); } static u8 tgl_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus) { return compute_dbuf_slices(pipe, active_pipes, join_mbus, tgl_allowed_dbufs); } static u8 adlp_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus) { return compute_dbuf_slices(pipe, active_pipes, join_mbus, adlp_allowed_dbufs); } static u8 dg2_compute_dbuf_slices(enum pipe pipe, u8 active_pipes, bool join_mbus) { return compute_dbuf_slices(pipe, active_pipes, join_mbus, dg2_allowed_dbufs); } static u8 skl_compute_dbuf_slices(struct intel_crtc *crtc, u8 active_pipes, bool join_mbus) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); enum pipe pipe = crtc->pipe; if (IS_DG2(dev_priv)) return dg2_compute_dbuf_slices(pipe, active_pipes, join_mbus); else if (IS_ALDERLAKE_P(dev_priv)) return adlp_compute_dbuf_slices(pipe, active_pipes, join_mbus); else if (DISPLAY_VER(dev_priv) == 12) return tgl_compute_dbuf_slices(pipe, active_pipes, join_mbus); else if (DISPLAY_VER(dev_priv) == 11) return icl_compute_dbuf_slices(pipe, active_pipes, join_mbus); /* * For anything else just return one slice yet. * Should be extended for other platforms. */ return active_pipes & BIT(pipe) ? BIT(DBUF_S1) : 0; } static bool use_minimal_wm0_only(const struct intel_crtc_state *crtc_state, struct intel_plane *plane) { struct drm_i915_private *i915 = to_i915(plane->base.dev); return DISPLAY_VER(i915) >= 13 && crtc_state->uapi.async_flip && plane->async_flip; } static u64 skl_total_relative_data_rate(const struct intel_crtc_state *crtc_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *i915 = to_i915(crtc->base.dev); enum plane_id plane_id; u64 data_rate = 0; for_each_plane_id_on_crtc(crtc, plane_id) { if (plane_id == PLANE_CURSOR) continue; data_rate += crtc_state->rel_data_rate[plane_id]; if (DISPLAY_VER(i915) < 11) data_rate += crtc_state->rel_data_rate_y[plane_id]; } return data_rate; } static const struct skl_wm_level * skl_plane_wm_level(const struct skl_pipe_wm *pipe_wm, enum plane_id plane_id, int level) { const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id]; if (level == 0 && pipe_wm->use_sagv_wm) return &wm->sagv.wm0; return &wm->wm[level]; } static const struct skl_wm_level * skl_plane_trans_wm(const struct skl_pipe_wm *pipe_wm, enum plane_id plane_id) { const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id]; if (pipe_wm->use_sagv_wm) return &wm->sagv.trans_wm; return &wm->trans_wm; } /* * We only disable the watermarks for each plane if * they exceed the ddb allocation of said plane. This * is done so that we don't end up touching cursor * watermarks needlessly when some other plane reduces * our max possible watermark level. * * Bspec has this to say about the PLANE_WM enable bit: * "All the watermarks at this level for all enabled * planes must be enabled before the level will be used." * So this is actually safe to do. */ static void skl_check_wm_level(struct skl_wm_level *wm, const struct skl_ddb_entry *ddb) { if (wm->min_ddb_alloc > skl_ddb_entry_size(ddb)) memset(wm, 0, sizeof(*wm)); } static void skl_check_nv12_wm_level(struct skl_wm_level *wm, struct skl_wm_level *uv_wm, const struct skl_ddb_entry *ddb_y, const struct skl_ddb_entry *ddb) { if (wm->min_ddb_alloc > skl_ddb_entry_size(ddb_y) || uv_wm->min_ddb_alloc > skl_ddb_entry_size(ddb)) { memset(wm, 0, sizeof(*wm)); memset(uv_wm, 0, sizeof(*uv_wm)); } } static bool icl_need_wm1_wa(struct drm_i915_private *i915, enum plane_id plane_id) { /* * Wa_1408961008:icl, ehl * Wa_14012656716:tgl, adl * Underruns with WM1+ disabled */ return DISPLAY_VER(i915) == 11 || (IS_DISPLAY_VER(i915, 12, 13) && plane_id == PLANE_CURSOR); } struct skl_plane_ddb_iter { u64 data_rate; u16 start, size; }; static void skl_allocate_plane_ddb(struct skl_plane_ddb_iter *iter, struct skl_ddb_entry *ddb, const struct skl_wm_level *wm, u64 data_rate) { u16 size, extra = 0; if (data_rate) { extra = min_t(u16, iter->size, DIV64_U64_ROUND_UP(iter->size * data_rate, iter->data_rate)); iter->size -= extra; iter->data_rate -= data_rate; } /* * Keep ddb entry of all disabled planes explicitly zeroed * to avoid skl_ddb_add_affected_planes() adding them to * the state when other planes change their allocations. */ size = wm->min_ddb_alloc + extra; if (size) iter->start = skl_ddb_entry_init(ddb, iter->start, iter->start + size); } static int skl_crtc_allocate_plane_ddb(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); const struct intel_dbuf_state *dbuf_state = intel_atomic_get_new_dbuf_state(state); const struct skl_ddb_entry *alloc = &dbuf_state->ddb[crtc->pipe]; int num_active = hweight8(dbuf_state->active_pipes); struct skl_plane_ddb_iter iter; enum plane_id plane_id; u16 cursor_size; u32 blocks; int level; /* Clear the partitioning for disabled planes. */ memset(crtc_state->wm.skl.plane_ddb, 0, sizeof(crtc_state->wm.skl.plane_ddb)); memset(crtc_state->wm.skl.plane_ddb_y, 0, sizeof(crtc_state->wm.skl.plane_ddb_y)); if (!crtc_state->hw.active) return 0; iter.start = alloc->start; iter.size = skl_ddb_entry_size(alloc); if (iter.size == 0) return 0; /* Allocate fixed number of blocks for cursor. */ cursor_size = skl_cursor_allocation(crtc_state, num_active); iter.size -= cursor_size; skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[PLANE_CURSOR], alloc->end - cursor_size, alloc->end); iter.data_rate = skl_total_relative_data_rate(crtc_state); /* * Find the highest watermark level for which we can satisfy the block * requirement of active planes. */ for (level = ilk_wm_max_level(dev_priv); level >= 0; level--) { blocks = 0; for_each_plane_id_on_crtc(crtc, plane_id) { const struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; if (plane_id == PLANE_CURSOR) { const struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; if (wm->wm[level].min_ddb_alloc > skl_ddb_entry_size(ddb)) { drm_WARN_ON(&dev_priv->drm, wm->wm[level].min_ddb_alloc != U16_MAX); blocks = U32_MAX; break; } continue; } blocks += wm->wm[level].min_ddb_alloc; blocks += wm->uv_wm[level].min_ddb_alloc; } if (blocks <= iter.size) { iter.size -= blocks; break; } } if (level < 0) { drm_dbg_kms(&dev_priv->drm, "Requested display configuration exceeds system DDB limitations"); drm_dbg_kms(&dev_priv->drm, "minimum required %d/%d\n", blocks, iter.size); return -EINVAL; } /* avoid the WARN later when we don't allocate any extra DDB */ if (iter.data_rate == 0) iter.size = 0; /* * Grant each plane the blocks it requires at the highest achievable * watermark level, plus an extra share of the leftover blocks * proportional to its relative data rate. */ for_each_plane_id_on_crtc(crtc, plane_id) { struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; struct skl_ddb_entry *ddb_y = &crtc_state->wm.skl.plane_ddb_y[plane_id]; const struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; if (plane_id == PLANE_CURSOR) continue; if (DISPLAY_VER(dev_priv) < 11 && crtc_state->nv12_planes & BIT(plane_id)) { skl_allocate_plane_ddb(&iter, ddb_y, &wm->wm[level], crtc_state->rel_data_rate_y[plane_id]); skl_allocate_plane_ddb(&iter, ddb, &wm->uv_wm[level], crtc_state->rel_data_rate[plane_id]); } else { skl_allocate_plane_ddb(&iter, ddb, &wm->wm[level], crtc_state->rel_data_rate[plane_id]); } } drm_WARN_ON(&dev_priv->drm, iter.size != 0 || iter.data_rate != 0); /* * When we calculated watermark values we didn't know how high * of a level we'd actually be able to hit, so we just marked * all levels as "enabled." Go back now and disable the ones * that aren't actually possible. */ for (level++; level <= ilk_wm_max_level(dev_priv); level++) { for_each_plane_id_on_crtc(crtc, plane_id) { const struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; const struct skl_ddb_entry *ddb_y = &crtc_state->wm.skl.plane_ddb_y[plane_id]; struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; if (DISPLAY_VER(dev_priv) < 11 && crtc_state->nv12_planes & BIT(plane_id)) skl_check_nv12_wm_level(&wm->wm[level], &wm->uv_wm[level], ddb_y, ddb); else skl_check_wm_level(&wm->wm[level], ddb); if (icl_need_wm1_wa(dev_priv, plane_id) && level == 1 && wm->wm[0].enable) { wm->wm[level].blocks = wm->wm[0].blocks; wm->wm[level].lines = wm->wm[0].lines; wm->wm[level].ignore_lines = wm->wm[0].ignore_lines; } } } /* * Go back and disable the transition and SAGV watermarks * if it turns out we don't have enough DDB blocks for them. */ for_each_plane_id_on_crtc(crtc, plane_id) { const struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; const struct skl_ddb_entry *ddb_y = &crtc_state->wm.skl.plane_ddb_y[plane_id]; struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id]; if (DISPLAY_VER(dev_priv) < 11 && crtc_state->nv12_planes & BIT(plane_id)) { skl_check_wm_level(&wm->trans_wm, ddb_y); } else { WARN_ON(skl_ddb_entry_size(ddb_y)); skl_check_wm_level(&wm->trans_wm, ddb); } skl_check_wm_level(&wm->sagv.wm0, ddb); skl_check_wm_level(&wm->sagv.trans_wm, ddb); } return 0; } /* * The max latency should be 257 (max the punit can code is 255 and we add 2us * for the read latency) and cpp should always be <= 8, so that * should allow pixel_rate up to ~2 GHz which seems sufficient since max * 2xcdclk is 1350 MHz and the pixel rate should never exceed that. */ static uint_fixed_16_16_t skl_wm_method1(const struct drm_i915_private *dev_priv, u32 pixel_rate, u8 cpp, u32 latency, u32 dbuf_block_size) { u32 wm_intermediate_val; uint_fixed_16_16_t ret; if (latency == 0) return FP_16_16_MAX; wm_intermediate_val = latency * pixel_rate * cpp; ret = div_fixed16(wm_intermediate_val, 1000 * dbuf_block_size); if (DISPLAY_VER(dev_priv) >= 10) ret = add_fixed16_u32(ret, 1); return ret; } static uint_fixed_16_16_t skl_wm_method2(u32 pixel_rate, u32 pipe_htotal, u32 latency, uint_fixed_16_16_t plane_blocks_per_line) { u32 wm_intermediate_val; uint_fixed_16_16_t ret; if (latency == 0) return FP_16_16_MAX; wm_intermediate_val = latency * pixel_rate; wm_intermediate_val = DIV_ROUND_UP(wm_intermediate_val, pipe_htotal * 1000); ret = mul_u32_fixed16(wm_intermediate_val, plane_blocks_per_line); return ret; } static uint_fixed_16_16_t intel_get_linetime_us(const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); u32 pixel_rate; u32 crtc_htotal; uint_fixed_16_16_t linetime_us; if (!crtc_state->hw.active) return u32_to_fixed16(0); pixel_rate = crtc_state->pixel_rate; if (drm_WARN_ON(&dev_priv->drm, pixel_rate == 0)) return u32_to_fixed16(0); crtc_htotal = crtc_state->hw.pipe_mode.crtc_htotal; linetime_us = div_fixed16(crtc_htotal * 1000, pixel_rate); return linetime_us; } static int skl_compute_wm_params(const struct intel_crtc_state *crtc_state, int width, const struct drm_format_info *format, u64 modifier, unsigned int rotation, u32 plane_pixel_rate, struct skl_wm_params *wp, int color_plane) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); u32 interm_pbpl; /* only planar format has two planes */ if (color_plane == 1 && !intel_format_info_is_yuv_semiplanar(format, modifier)) { drm_dbg_kms(&dev_priv->drm, "Non planar format have single plane\n"); return -EINVAL; } wp->y_tiled = modifier == I915_FORMAT_MOD_Y_TILED || modifier == I915_FORMAT_MOD_4_TILED || modifier == I915_FORMAT_MOD_Yf_TILED || modifier == I915_FORMAT_MOD_Y_TILED_CCS || modifier == I915_FORMAT_MOD_Yf_TILED_CCS; wp->x_tiled = modifier == I915_FORMAT_MOD_X_TILED; wp->rc_surface = modifier == I915_FORMAT_MOD_Y_TILED_CCS || modifier == I915_FORMAT_MOD_Yf_TILED_CCS; wp->is_planar = intel_format_info_is_yuv_semiplanar(format, modifier); wp->width = width; if (color_plane == 1 && wp->is_planar) wp->width /= 2; wp->cpp = format->cpp[color_plane]; wp->plane_pixel_rate = plane_pixel_rate; if (DISPLAY_VER(dev_priv) >= 11 && modifier == I915_FORMAT_MOD_Yf_TILED && wp->cpp == 1) wp->dbuf_block_size = 256; else wp->dbuf_block_size = 512; if (drm_rotation_90_or_270(rotation)) { switch (wp->cpp) { case 1: wp->y_min_scanlines = 16; break; case 2: wp->y_min_scanlines = 8; break; case 4: wp->y_min_scanlines = 4; break; default: MISSING_CASE(wp->cpp); return -EINVAL; } } else { wp->y_min_scanlines = 4; } if (skl_needs_memory_bw_wa(dev_priv)) wp->y_min_scanlines *= 2; wp->plane_bytes_per_line = wp->width * wp->cpp; if (wp->y_tiled) { interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line * wp->y_min_scanlines, wp->dbuf_block_size); if (DISPLAY_VER(dev_priv) >= 10) interm_pbpl++; wp->plane_blocks_per_line = div_fixed16(interm_pbpl, wp->y_min_scanlines); } else { interm_pbpl = DIV_ROUND_UP(wp->plane_bytes_per_line, wp->dbuf_block_size); if (!wp->x_tiled || DISPLAY_VER(dev_priv) >= 10) interm_pbpl++; wp->plane_blocks_per_line = u32_to_fixed16(interm_pbpl); } wp->y_tile_minimum = mul_u32_fixed16(wp->y_min_scanlines, wp->plane_blocks_per_line); wp->linetime_us = fixed16_to_u32_round_up( intel_get_linetime_us(crtc_state)); return 0; } static int skl_compute_plane_wm_params(const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, struct skl_wm_params *wp, int color_plane) { const struct drm_framebuffer *fb = plane_state->hw.fb; int width; /* * Src coordinates are already rotated by 270 degrees for * the 90/270 degree plane rotation cases (to match the * GTT mapping), hence no need to account for rotation here. */ width = drm_rect_width(&plane_state->uapi.src) >> 16; return skl_compute_wm_params(crtc_state, width, fb->format, fb->modifier, plane_state->hw.rotation, intel_plane_pixel_rate(crtc_state, plane_state), wp, color_plane); } static bool skl_wm_has_lines(struct drm_i915_private *dev_priv, int level) { if (DISPLAY_VER(dev_priv) >= 10) return true; /* The number of lines are ignored for the level 0 watermark. */ return level > 0; } static int skl_wm_max_lines(struct drm_i915_private *dev_priv) { if (DISPLAY_VER(dev_priv) >= 13) return 255; else return 31; } static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state, struct intel_plane *plane, int level, unsigned int latency, const struct skl_wm_params *wp, const struct skl_wm_level *result_prev, struct skl_wm_level *result /* out */) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); uint_fixed_16_16_t method1, method2; uint_fixed_16_16_t selected_result; u32 blocks, lines, min_ddb_alloc = 0; if (latency == 0 || (use_minimal_wm0_only(crtc_state, plane) && level > 0)) { /* reject it */ result->min_ddb_alloc = U16_MAX; return; } /* * WaIncreaseLatencyIPCEnabled: kbl,cfl * Display WA #1141: kbl,cfl */ if ((IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) || IS_COMETLAKE(dev_priv)) && dev_priv->ipc_enabled) latency += 4; if (skl_needs_memory_bw_wa(dev_priv) && wp->x_tiled) latency += 15; method1 = skl_wm_method1(dev_priv, wp->plane_pixel_rate, wp->cpp, latency, wp->dbuf_block_size); method2 = skl_wm_method2(wp->plane_pixel_rate, crtc_state->hw.pipe_mode.crtc_htotal, latency, wp->plane_blocks_per_line); if (wp->y_tiled) { selected_result = max_fixed16(method2, wp->y_tile_minimum); } else { if ((wp->cpp * crtc_state->hw.pipe_mode.crtc_htotal / wp->dbuf_block_size < 1) && (wp->plane_bytes_per_line / wp->dbuf_block_size < 1)) { selected_result = method2; } else if (latency >= wp->linetime_us) { if (DISPLAY_VER(dev_priv) == 9) selected_result = min_fixed16(method1, method2); else selected_result = method2; } else { selected_result = method1; } } blocks = fixed16_to_u32_round_up(selected_result) + 1; /* * Lets have blocks at minimum equivalent to plane_blocks_per_line * as there will be at minimum one line for lines configuration. This * is a work around for FIFO underruns observed with resolutions like * 4k 60 Hz in single channel DRAM configurations. * * As per the Bspec 49325, if the ddb allocation can hold at least * one plane_blocks_per_line, we should have selected method2 in * the above logic. Assuming that modern versions have enough dbuf * and method2 guarantees blocks equivalent to at least 1 line, * select the blocks as plane_blocks_per_line. * * TODO: Revisit the logic when we have better understanding on DRAM * channels' impact on the level 0 memory latency and the relevant * wm calculations. */ if (skl_wm_has_lines(dev_priv, level)) blocks = max(blocks, fixed16_to_u32_round_up(wp->plane_blocks_per_line)); lines = div_round_up_fixed16(selected_result, wp->plane_blocks_per_line); if (DISPLAY_VER(dev_priv) == 9) { /* Display WA #1125: skl,bxt,kbl */ if (level == 0 && wp->rc_surface) blocks += fixed16_to_u32_round_up(wp->y_tile_minimum); /* Display WA #1126: skl,bxt,kbl */ if (level >= 1 && level <= 7) { if (wp->y_tiled) { blocks += fixed16_to_u32_round_up(wp->y_tile_minimum); lines += wp->y_min_scanlines; } else { blocks++; } /* * Make sure result blocks for higher latency levels are * atleast as high as level below the current level. * Assumption in DDB algorithm optimization for special * cases. Also covers Display WA #1125 for RC. */ if (result_prev->blocks > blocks) blocks = result_prev->blocks; } } if (DISPLAY_VER(dev_priv) >= 11) { if (wp->y_tiled) { int extra_lines; if (lines % wp->y_min_scanlines == 0) extra_lines = wp->y_min_scanlines; else extra_lines = wp->y_min_scanlines * 2 - lines % wp->y_min_scanlines; min_ddb_alloc = mul_round_up_u32_fixed16(lines + extra_lines, wp->plane_blocks_per_line); } else { min_ddb_alloc = blocks + DIV_ROUND_UP(blocks, 10); } } if (!skl_wm_has_lines(dev_priv, level)) lines = 0; if (lines > skl_wm_max_lines(dev_priv)) { /* reject it */ result->min_ddb_alloc = U16_MAX; return; } /* * If lines is valid, assume we can use this watermark level * for now. We'll come back and disable it after we calculate the * DDB allocation if it turns out we don't actually have enough * blocks to satisfy it. */ result->blocks = blocks; result->lines = lines; /* Bspec says: value >= plane ddb allocation -> invalid, hence the +1 here */ result->min_ddb_alloc = max(min_ddb_alloc, blocks) + 1; result->enable = true; if (DISPLAY_VER(dev_priv) < 12 && dev_priv->sagv_block_time_us) result->can_sagv = latency >= dev_priv->sagv_block_time_us; } static void skl_compute_wm_levels(const struct intel_crtc_state *crtc_state, struct intel_plane *plane, const struct skl_wm_params *wm_params, struct skl_wm_level *levels) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); int level, max_level = ilk_wm_max_level(dev_priv); struct skl_wm_level *result_prev = &levels[0]; for (level = 0; level <= max_level; level++) { struct skl_wm_level *result = &levels[level]; unsigned int latency = dev_priv->wm.skl_latency[level]; skl_compute_plane_wm(crtc_state, plane, level, latency, wm_params, result_prev, result); result_prev = result; } } static void tgl_compute_sagv_wm(const struct intel_crtc_state *crtc_state, struct intel_plane *plane, const struct skl_wm_params *wm_params, struct skl_plane_wm *plane_wm) { struct drm_i915_private *dev_priv = to_i915(crtc_state->uapi.crtc->dev); struct skl_wm_level *sagv_wm = &plane_wm->sagv.wm0; struct skl_wm_level *levels = plane_wm->wm; unsigned int latency = 0; if (dev_priv->sagv_block_time_us) latency = dev_priv->sagv_block_time_us + dev_priv->wm.skl_latency[0]; skl_compute_plane_wm(crtc_state, plane, 0, latency, wm_params, &levels[0], sagv_wm); } static void skl_compute_transition_wm(struct drm_i915_private *dev_priv, struct skl_wm_level *trans_wm, const struct skl_wm_level *wm0, const struct skl_wm_params *wp) { u16 trans_min, trans_amount, trans_y_tile_min; u16 wm0_blocks, trans_offset, blocks; /* Transition WM don't make any sense if ipc is disabled */ if (!dev_priv->ipc_enabled) return; /* * WaDisableTWM:skl,kbl,cfl,bxt * Transition WM are not recommended by HW team for GEN9 */ if (DISPLAY_VER(dev_priv) == 9) return; if (DISPLAY_VER(dev_priv) >= 11) trans_min = 4; else trans_min = 14; /* Display WA #1140: glk,cnl */ if (DISPLAY_VER(dev_priv) == 10) trans_amount = 0; else trans_amount = 10; /* This is configurable amount */ trans_offset = trans_min + trans_amount; /* * The spec asks for Selected Result Blocks for wm0 (the real value), * not Result Blocks (the integer value). Pay attention to the capital * letters. The value wm_l0->blocks is actually Result Blocks, but * since Result Blocks is the ceiling of Selected Result Blocks plus 1, * and since we later will have to get the ceiling of the sum in the * transition watermarks calculation, we can just pretend Selected * Result Blocks is Result Blocks minus 1 and it should work for the * current platforms. */ wm0_blocks = wm0->blocks - 1; if (wp->y_tiled) { trans_y_tile_min = (u16)mul_round_up_u32_fixed16(2, wp->y_tile_minimum); blocks = max(wm0_blocks, trans_y_tile_min) + trans_offset; } else { blocks = wm0_blocks + trans_offset; } blocks++; /* * Just assume we can enable the transition watermark. After * computing the DDB we'll come back and disable it if that * assumption turns out to be false. */ trans_wm->blocks = blocks; trans_wm->min_ddb_alloc = max_t(u16, wm0->min_ddb_alloc, blocks + 1); trans_wm->enable = true; } static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, struct intel_plane *plane, int color_plane) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id]; struct skl_wm_params wm_params; int ret; ret = skl_compute_plane_wm_params(crtc_state, plane_state, &wm_params, color_plane); if (ret) return ret; skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->wm); skl_compute_transition_wm(dev_priv, &wm->trans_wm, &wm->wm[0], &wm_params); if (DISPLAY_VER(dev_priv) >= 12) { tgl_compute_sagv_wm(crtc_state, plane, &wm_params, wm); skl_compute_transition_wm(dev_priv, &wm->sagv.trans_wm, &wm->sagv.wm0, &wm_params); } return 0; } static int skl_build_plane_wm_uv(struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, struct intel_plane *plane) { struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane->id]; struct skl_wm_params wm_params; int ret; wm->is_planar = true; /* uv plane watermarks must also be validated for NV12/Planar */ ret = skl_compute_plane_wm_params(crtc_state, plane_state, &wm_params, 1); if (ret) return ret; skl_compute_wm_levels(crtc_state, plane, &wm_params, wm->uv_wm); return 0; } static int skl_build_plane_wm(struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); enum plane_id plane_id = plane->id; struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id]; const struct drm_framebuffer *fb = plane_state->hw.fb; int ret; memset(wm, 0, sizeof(*wm)); if (!intel_wm_plane_visible(crtc_state, plane_state)) return 0; ret = skl_build_plane_wm_single(crtc_state, plane_state, plane, 0); if (ret) return ret; if (fb->format->is_yuv && fb->format->num_planes > 1) { ret = skl_build_plane_wm_uv(crtc_state, plane_state, plane); if (ret) return ret; } return 0; } static int icl_build_plane_wm(struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state) { struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane); struct drm_i915_private *dev_priv = to_i915(plane->base.dev); enum plane_id plane_id = plane->id; struct skl_plane_wm *wm = &crtc_state->wm.skl.raw.planes[plane_id]; int ret; /* Watermarks calculated in master */ if (plane_state->planar_slave) return 0; memset(wm, 0, sizeof(*wm)); if (plane_state->planar_linked_plane) { const struct drm_framebuffer *fb = plane_state->hw.fb; drm_WARN_ON(&dev_priv->drm, !intel_wm_plane_visible(crtc_state, plane_state)); drm_WARN_ON(&dev_priv->drm, !fb->format->is_yuv || fb->format->num_planes == 1); ret = skl_build_plane_wm_single(crtc_state, plane_state, plane_state->planar_linked_plane, 0); if (ret) return ret; ret = skl_build_plane_wm_single(crtc_state, plane_state, plane, 1); if (ret) return ret; } else if (intel_wm_plane_visible(crtc_state, plane_state)) { ret = skl_build_plane_wm_single(crtc_state, plane_state, plane, 0); if (ret) return ret; } return 0; } static int skl_build_pipe_wm(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); const struct intel_plane_state *plane_state; struct intel_plane *plane; int ret, i; for_each_new_intel_plane_in_state(state, plane, plane_state, i) { /* * FIXME should perhaps check {old,new}_plane_crtc->hw.crtc * instead but we don't populate that correctly for NV12 Y * planes so for now hack this. */ if (plane->pipe != crtc->pipe) continue; if (DISPLAY_VER(dev_priv) >= 11) ret = icl_build_plane_wm(crtc_state, plane_state); else ret = skl_build_plane_wm(crtc_state, plane_state); if (ret) return ret; } crtc_state->wm.skl.optimal = crtc_state->wm.skl.raw; return 0; } static void skl_ddb_entry_write(struct drm_i915_private *dev_priv, i915_reg_t reg, const struct skl_ddb_entry *entry) { if (entry->end) intel_de_write_fw(dev_priv, reg, PLANE_BUF_END(entry->end - 1) | PLANE_BUF_START(entry->start)); else intel_de_write_fw(dev_priv, reg, 0); } static void skl_write_wm_level(struct drm_i915_private *dev_priv, i915_reg_t reg, const struct skl_wm_level *level) { u32 val = 0; if (level->enable) val |= PLANE_WM_EN; if (level->ignore_lines) val |= PLANE_WM_IGNORE_LINES; val |= REG_FIELD_PREP(PLANE_WM_BLOCKS_MASK, level->blocks); val |= REG_FIELD_PREP(PLANE_WM_LINES_MASK, level->lines); intel_de_write_fw(dev_priv, reg, val); } void skl_write_plane_wm(struct intel_plane *plane, const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = to_i915(plane->base.dev); int level, max_level = ilk_wm_max_level(dev_priv); enum plane_id plane_id = plane->id; enum pipe pipe = plane->pipe; const struct skl_pipe_wm *pipe_wm = &crtc_state->wm.skl.optimal; const struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; const struct skl_ddb_entry *ddb_y = &crtc_state->wm.skl.plane_ddb_y[plane_id]; for (level = 0; level <= max_level; level++) skl_write_wm_level(dev_priv, PLANE_WM(pipe, plane_id, level), skl_plane_wm_level(pipe_wm, plane_id, level)); skl_write_wm_level(dev_priv, PLANE_WM_TRANS(pipe, plane_id), skl_plane_trans_wm(pipe_wm, plane_id)); if (HAS_HW_SAGV_WM(dev_priv)) { const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id]; skl_write_wm_level(dev_priv, PLANE_WM_SAGV(pipe, plane_id), &wm->sagv.wm0); skl_write_wm_level(dev_priv, PLANE_WM_SAGV_TRANS(pipe, plane_id), &wm->sagv.trans_wm); } skl_ddb_entry_write(dev_priv, PLANE_BUF_CFG(pipe, plane_id), ddb); if (DISPLAY_VER(dev_priv) < 11) skl_ddb_entry_write(dev_priv, PLANE_NV12_BUF_CFG(pipe, plane_id), ddb_y); } void skl_write_cursor_wm(struct intel_plane *plane, const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = to_i915(plane->base.dev); int level, max_level = ilk_wm_max_level(dev_priv); enum plane_id plane_id = plane->id; enum pipe pipe = plane->pipe; const struct skl_pipe_wm *pipe_wm = &crtc_state->wm.skl.optimal; const struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; for (level = 0; level <= max_level; level++) skl_write_wm_level(dev_priv, CUR_WM(pipe, level), skl_plane_wm_level(pipe_wm, plane_id, level)); skl_write_wm_level(dev_priv, CUR_WM_TRANS(pipe), skl_plane_trans_wm(pipe_wm, plane_id)); if (HAS_HW_SAGV_WM(dev_priv)) { const struct skl_plane_wm *wm = &pipe_wm->planes[plane_id]; skl_write_wm_level(dev_priv, CUR_WM_SAGV(pipe), &wm->sagv.wm0); skl_write_wm_level(dev_priv, CUR_WM_SAGV_TRANS(pipe), &wm->sagv.trans_wm); } skl_ddb_entry_write(dev_priv, CUR_BUF_CFG(pipe), ddb); } static bool skl_wm_level_equals(const struct skl_wm_level *l1, const struct skl_wm_level *l2) { return l1->enable == l2->enable && l1->ignore_lines == l2->ignore_lines && l1->lines == l2->lines && l1->blocks == l2->blocks; } static bool skl_plane_wm_equals(struct drm_i915_private *dev_priv, const struct skl_plane_wm *wm1, const struct skl_plane_wm *wm2) { int level, max_level = ilk_wm_max_level(dev_priv); for (level = 0; level <= max_level; level++) { /* * We don't check uv_wm as the hardware doesn't actually * use it. It only gets used for calculating the required * ddb allocation. */ if (!skl_wm_level_equals(&wm1->wm[level], &wm2->wm[level])) return false; } return skl_wm_level_equals(&wm1->trans_wm, &wm2->trans_wm) && skl_wm_level_equals(&wm1->sagv.wm0, &wm2->sagv.wm0) && skl_wm_level_equals(&wm1->sagv.trans_wm, &wm2->sagv.trans_wm); } static bool skl_ddb_entries_overlap(const struct skl_ddb_entry *a, const struct skl_ddb_entry *b) { return a->start < b->end && b->start < a->end; } static void skl_ddb_entry_union(struct skl_ddb_entry *a, const struct skl_ddb_entry *b) { if (a->end && b->end) { a->start = min(a->start, b->start); a->end = max(a->end, b->end); } else if (b->end) { a->start = b->start; a->end = b->end; } } bool skl_ddb_allocation_overlaps(const struct skl_ddb_entry *ddb, const struct skl_ddb_entry *entries, int num_entries, int ignore_idx) { int i; for (i = 0; i < num_entries; i++) { if (i != ignore_idx && skl_ddb_entries_overlap(ddb, &entries[i])) return true; } return false; } static int skl_ddb_add_affected_planes(const struct intel_crtc_state *old_crtc_state, struct intel_crtc_state *new_crtc_state) { struct intel_atomic_state *state = to_intel_atomic_state(new_crtc_state->uapi.state); struct intel_crtc *crtc = to_intel_crtc(new_crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct intel_plane *plane; for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) { struct intel_plane_state *plane_state; enum plane_id plane_id = plane->id; if (skl_ddb_entry_equal(&old_crtc_state->wm.skl.plane_ddb[plane_id], &new_crtc_state->wm.skl.plane_ddb[plane_id]) && skl_ddb_entry_equal(&old_crtc_state->wm.skl.plane_ddb_y[plane_id], &new_crtc_state->wm.skl.plane_ddb_y[plane_id])) continue; plane_state = intel_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) return PTR_ERR(plane_state); new_crtc_state->update_planes |= BIT(plane_id); } return 0; } static u8 intel_dbuf_enabled_slices(const struct intel_dbuf_state *dbuf_state) { struct drm_i915_private *dev_priv = to_i915(dbuf_state->base.state->base.dev); u8 enabled_slices; enum pipe pipe; /* * FIXME: For now we always enable slice S1 as per * the Bspec display initialization sequence. */ enabled_slices = BIT(DBUF_S1); for_each_pipe(dev_priv, pipe) enabled_slices |= dbuf_state->slices[pipe]; return enabled_slices; } static int skl_compute_ddb(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); const struct intel_dbuf_state *old_dbuf_state; struct intel_dbuf_state *new_dbuf_state = NULL; const struct intel_crtc_state *old_crtc_state; struct intel_crtc_state *new_crtc_state; struct intel_crtc *crtc; int ret, i; for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { new_dbuf_state = intel_atomic_get_dbuf_state(state); if (IS_ERR(new_dbuf_state)) return PTR_ERR(new_dbuf_state); old_dbuf_state = intel_atomic_get_old_dbuf_state(state); break; } if (!new_dbuf_state) return 0; new_dbuf_state->active_pipes = intel_calc_active_pipes(state, old_dbuf_state->active_pipes); if (old_dbuf_state->active_pipes != new_dbuf_state->active_pipes) { ret = intel_atomic_lock_global_state(&new_dbuf_state->base); if (ret) return ret; } if (HAS_MBUS_JOINING(dev_priv)) new_dbuf_state->joined_mbus = adlp_check_mbus_joined(new_dbuf_state->active_pipes); for_each_intel_crtc(&dev_priv->drm, crtc) { enum pipe pipe = crtc->pipe; new_dbuf_state->slices[pipe] = skl_compute_dbuf_slices(crtc, new_dbuf_state->active_pipes, new_dbuf_state->joined_mbus); if (old_dbuf_state->slices[pipe] == new_dbuf_state->slices[pipe]) continue; ret = intel_atomic_lock_global_state(&new_dbuf_state->base); if (ret) return ret; } new_dbuf_state->enabled_slices = intel_dbuf_enabled_slices(new_dbuf_state); if (old_dbuf_state->enabled_slices != new_dbuf_state->enabled_slices || old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) { ret = intel_atomic_serialize_global_state(&new_dbuf_state->base); if (ret) return ret; if (old_dbuf_state->joined_mbus != new_dbuf_state->joined_mbus) { /* TODO: Implement vblank synchronized MBUS joining changes */ ret = intel_modeset_all_pipes(state); if (ret) return ret; } drm_dbg_kms(&dev_priv->drm, "Enabled dbuf slices 0x%x -> 0x%x (total dbuf slices 0x%x), mbus joined? %s->%s\n", old_dbuf_state->enabled_slices, new_dbuf_state->enabled_slices, INTEL_INFO(dev_priv)->display.dbuf.slice_mask, str_yes_no(old_dbuf_state->joined_mbus), str_yes_no(new_dbuf_state->joined_mbus)); } for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { enum pipe pipe = crtc->pipe; new_dbuf_state->weight[pipe] = intel_crtc_ddb_weight(new_crtc_state); if (old_dbuf_state->weight[pipe] == new_dbuf_state->weight[pipe]) continue; ret = intel_atomic_lock_global_state(&new_dbuf_state->base); if (ret) return ret; } for_each_intel_crtc(&dev_priv->drm, crtc) { ret = skl_crtc_allocate_ddb(state, crtc); if (ret) return ret; } for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { ret = skl_crtc_allocate_plane_ddb(state, crtc); if (ret) return ret; ret = skl_ddb_add_affected_planes(old_crtc_state, new_crtc_state); if (ret) return ret; } return 0; } static char enast(bool enable) { return enable ? '*' : ' '; } static void skl_print_wm_changes(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); const struct intel_crtc_state *old_crtc_state; const struct intel_crtc_state *new_crtc_state; struct intel_plane *plane; struct intel_crtc *crtc; int i; if (!drm_debug_enabled(DRM_UT_KMS)) return; for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { const struct skl_pipe_wm *old_pipe_wm, *new_pipe_wm; old_pipe_wm = &old_crtc_state->wm.skl.optimal; new_pipe_wm = &new_crtc_state->wm.skl.optimal; for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) { enum plane_id plane_id = plane->id; const struct skl_ddb_entry *old, *new; old = &old_crtc_state->wm.skl.plane_ddb[plane_id]; new = &new_crtc_state->wm.skl.plane_ddb[plane_id]; if (skl_ddb_entry_equal(old, new)) continue; drm_dbg_kms(&dev_priv->drm, "[PLANE:%d:%s] ddb (%4d - %4d) -> (%4d - %4d), size %4d -> %4d\n", plane->base.base.id, plane->base.name, old->start, old->end, new->start, new->end, skl_ddb_entry_size(old), skl_ddb_entry_size(new)); } for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) { enum plane_id plane_id = plane->id; const struct skl_plane_wm *old_wm, *new_wm; old_wm = &old_pipe_wm->planes[plane_id]; new_wm = &new_pipe_wm->planes[plane_id]; if (skl_plane_wm_equals(dev_priv, old_wm, new_wm)) continue; drm_dbg_kms(&dev_priv->drm, "[PLANE:%d:%s] level %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm,%cswm,%cstwm" " -> %cwm0,%cwm1,%cwm2,%cwm3,%cwm4,%cwm5,%cwm6,%cwm7,%ctwm,%cswm,%cstwm\n", plane->base.base.id, plane->base.name, enast(old_wm->wm[0].enable), enast(old_wm->wm[1].enable), enast(old_wm->wm[2].enable), enast(old_wm->wm[3].enable), enast(old_wm->wm[4].enable), enast(old_wm->wm[5].enable), enast(old_wm->wm[6].enable), enast(old_wm->wm[7].enable), enast(old_wm->trans_wm.enable), enast(old_wm->sagv.wm0.enable), enast(old_wm->sagv.trans_wm.enable), enast(new_wm->wm[0].enable), enast(new_wm->wm[1].enable), enast(new_wm->wm[2].enable), enast(new_wm->wm[3].enable), enast(new_wm->wm[4].enable), enast(new_wm->wm[5].enable), enast(new_wm->wm[6].enable), enast(new_wm->wm[7].enable), enast(new_wm->trans_wm.enable), enast(new_wm->sagv.wm0.enable), enast(new_wm->sagv.trans_wm.enable)); drm_dbg_kms(&dev_priv->drm, "[PLANE:%d:%s] lines %c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%4d" " -> %c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%3d,%c%4d\n", plane->base.base.id, plane->base.name, enast(old_wm->wm[0].ignore_lines), old_wm->wm[0].lines, enast(old_wm->wm[1].ignore_lines), old_wm->wm[1].lines, enast(old_wm->wm[2].ignore_lines), old_wm->wm[2].lines, enast(old_wm->wm[3].ignore_lines), old_wm->wm[3].lines, enast(old_wm->wm[4].ignore_lines), old_wm->wm[4].lines, enast(old_wm->wm[5].ignore_lines), old_wm->wm[5].lines, enast(old_wm->wm[6].ignore_lines), old_wm->wm[6].lines, enast(old_wm->wm[7].ignore_lines), old_wm->wm[7].lines, enast(old_wm->trans_wm.ignore_lines), old_wm->trans_wm.lines, enast(old_wm->sagv.wm0.ignore_lines), old_wm->sagv.wm0.lines, enast(old_wm->sagv.trans_wm.ignore_lines), old_wm->sagv.trans_wm.lines, enast(new_wm->wm[0].ignore_lines), new_wm->wm[0].lines, enast(new_wm->wm[1].ignore_lines), new_wm->wm[1].lines, enast(new_wm->wm[2].ignore_lines), new_wm->wm[2].lines, enast(new_wm->wm[3].ignore_lines), new_wm->wm[3].lines, enast(new_wm->wm[4].ignore_lines), new_wm->wm[4].lines, enast(new_wm->wm[5].ignore_lines), new_wm->wm[5].lines, enast(new_wm->wm[6].ignore_lines), new_wm->wm[6].lines, enast(new_wm->wm[7].ignore_lines), new_wm->wm[7].lines, enast(new_wm->trans_wm.ignore_lines), new_wm->trans_wm.lines, enast(new_wm->sagv.wm0.ignore_lines), new_wm->sagv.wm0.lines, enast(new_wm->sagv.trans_wm.ignore_lines), new_wm->sagv.trans_wm.lines); drm_dbg_kms(&dev_priv->drm, "[PLANE:%d:%s] blocks %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d" " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d\n", plane->base.base.id, plane->base.name, old_wm->wm[0].blocks, old_wm->wm[1].blocks, old_wm->wm[2].blocks, old_wm->wm[3].blocks, old_wm->wm[4].blocks, old_wm->wm[5].blocks, old_wm->wm[6].blocks, old_wm->wm[7].blocks, old_wm->trans_wm.blocks, old_wm->sagv.wm0.blocks, old_wm->sagv.trans_wm.blocks, new_wm->wm[0].blocks, new_wm->wm[1].blocks, new_wm->wm[2].blocks, new_wm->wm[3].blocks, new_wm->wm[4].blocks, new_wm->wm[5].blocks, new_wm->wm[6].blocks, new_wm->wm[7].blocks, new_wm->trans_wm.blocks, new_wm->sagv.wm0.blocks, new_wm->sagv.trans_wm.blocks); drm_dbg_kms(&dev_priv->drm, "[PLANE:%d:%s] min_ddb %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d" " -> %4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%4d,%5d\n", plane->base.base.id, plane->base.name, old_wm->wm[0].min_ddb_alloc, old_wm->wm[1].min_ddb_alloc, old_wm->wm[2].min_ddb_alloc, old_wm->wm[3].min_ddb_alloc, old_wm->wm[4].min_ddb_alloc, old_wm->wm[5].min_ddb_alloc, old_wm->wm[6].min_ddb_alloc, old_wm->wm[7].min_ddb_alloc, old_wm->trans_wm.min_ddb_alloc, old_wm->sagv.wm0.min_ddb_alloc, old_wm->sagv.trans_wm.min_ddb_alloc, new_wm->wm[0].min_ddb_alloc, new_wm->wm[1].min_ddb_alloc, new_wm->wm[2].min_ddb_alloc, new_wm->wm[3].min_ddb_alloc, new_wm->wm[4].min_ddb_alloc, new_wm->wm[5].min_ddb_alloc, new_wm->wm[6].min_ddb_alloc, new_wm->wm[7].min_ddb_alloc, new_wm->trans_wm.min_ddb_alloc, new_wm->sagv.wm0.min_ddb_alloc, new_wm->sagv.trans_wm.min_ddb_alloc); } } } static bool skl_plane_selected_wm_equals(struct intel_plane *plane, const struct skl_pipe_wm *old_pipe_wm, const struct skl_pipe_wm *new_pipe_wm) { struct drm_i915_private *i915 = to_i915(plane->base.dev); int level, max_level = ilk_wm_max_level(i915); for (level = 0; level <= max_level; level++) { /* * We don't check uv_wm as the hardware doesn't actually * use it. It only gets used for calculating the required * ddb allocation. */ if (!skl_wm_level_equals(skl_plane_wm_level(old_pipe_wm, plane->id, level), skl_plane_wm_level(new_pipe_wm, plane->id, level))) return false; } if (HAS_HW_SAGV_WM(i915)) { const struct skl_plane_wm *old_wm = &old_pipe_wm->planes[plane->id]; const struct skl_plane_wm *new_wm = &new_pipe_wm->planes[plane->id]; if (!skl_wm_level_equals(&old_wm->sagv.wm0, &new_wm->sagv.wm0) || !skl_wm_level_equals(&old_wm->sagv.trans_wm, &new_wm->sagv.trans_wm)) return false; } return skl_wm_level_equals(skl_plane_trans_wm(old_pipe_wm, plane->id), skl_plane_trans_wm(new_pipe_wm, plane->id)); } /* * To make sure the cursor watermark registers are always consistent * with our computed state the following scenario needs special * treatment: * * 1. enable cursor * 2. move cursor entirely offscreen * 3. disable cursor * * Step 2. does call .disable_plane() but does not zero the watermarks * (since we consider an offscreen cursor still active for the purposes * of watermarks). Step 3. would not normally call .disable_plane() * because the actual plane visibility isn't changing, and we don't * deallocate the cursor ddb until the pipe gets disabled. So we must * force step 3. to call .disable_plane() to update the watermark * registers properly. * * Other planes do not suffer from this issues as their watermarks are * calculated based on the actual plane visibility. The only time this * can trigger for the other planes is during the initial readout as the * default value of the watermarks registers is not zero. */ static int skl_wm_add_affected_planes(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *old_crtc_state = intel_atomic_get_old_crtc_state(state, crtc); struct intel_crtc_state *new_crtc_state = intel_atomic_get_new_crtc_state(state, crtc); struct intel_plane *plane; for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) { struct intel_plane_state *plane_state; enum plane_id plane_id = plane->id; /* * Force a full wm update for every plane on modeset. * Required because the reset value of the wm registers * is non-zero, whereas we want all disabled planes to * have zero watermarks. So if we turn off the relevant * power well the hardware state will go out of sync * with the software state. */ if (!drm_atomic_crtc_needs_modeset(&new_crtc_state->uapi) && skl_plane_selected_wm_equals(plane, &old_crtc_state->wm.skl.optimal, &new_crtc_state->wm.skl.optimal)) continue; plane_state = intel_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) return PTR_ERR(plane_state); new_crtc_state->update_planes |= BIT(plane_id); } return 0; } static int skl_compute_wm(struct intel_atomic_state *state) { struct intel_crtc *crtc; struct intel_crtc_state *new_crtc_state; int ret, i; for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { ret = skl_build_pipe_wm(state, crtc); if (ret) return ret; } ret = skl_compute_ddb(state); if (ret) return ret; ret = intel_compute_sagv_mask(state); if (ret) return ret; /* * skl_compute_ddb() will have adjusted the final watermarks * based on how much ddb is available. Now we can actually * check if the final watermarks changed. */ for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { ret = skl_wm_add_affected_planes(state, crtc); if (ret) return ret; } skl_print_wm_changes(state); return 0; } static void ilk_compute_wm_config(struct drm_i915_private *dev_priv, struct intel_wm_config *config) { struct intel_crtc *crtc; /* Compute the currently _active_ config */ for_each_intel_crtc(&dev_priv->drm, crtc) { const struct intel_pipe_wm *wm = &crtc->wm.active.ilk; if (!wm->pipe_enabled) continue; config->sprites_enabled |= wm->sprites_enabled; config->sprites_scaled |= wm->sprites_scaled; config->num_pipes_active++; } } static void ilk_program_watermarks(struct drm_i915_private *dev_priv) { struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm; struct ilk_wm_maximums max; struct intel_wm_config config = {}; struct ilk_wm_values results = {}; enum intel_ddb_partitioning partitioning; ilk_compute_wm_config(dev_priv, &config); ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_1_2, &max); ilk_wm_merge(dev_priv, &config, &max, &lp_wm_1_2); /* 5/6 split only in single pipe config on IVB+ */ if (DISPLAY_VER(dev_priv) >= 7 && config.num_pipes_active == 1 && config.sprites_enabled) { ilk_compute_wm_maximums(dev_priv, 1, &config, INTEL_DDB_PART_5_6, &max); ilk_wm_merge(dev_priv, &config, &max, &lp_wm_5_6); best_lp_wm = ilk_find_best_result(dev_priv, &lp_wm_1_2, &lp_wm_5_6); } else { best_lp_wm = &lp_wm_1_2; } partitioning = (best_lp_wm == &lp_wm_1_2) ? INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6; ilk_compute_wm_results(dev_priv, best_lp_wm, partitioning, &results); ilk_write_wm_values(dev_priv, &results); } static void ilk_initial_watermarks(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); mutex_lock(&dev_priv->wm.wm_mutex); crtc->wm.active.ilk = crtc_state->wm.ilk.intermediate; ilk_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } static void ilk_optimize_watermarks(struct intel_atomic_state *state, struct intel_crtc *crtc) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); const struct intel_crtc_state *crtc_state = intel_atomic_get_new_crtc_state(state, crtc); if (!crtc_state->wm.need_postvbl_update) return; mutex_lock(&dev_priv->wm.wm_mutex); crtc->wm.active.ilk = crtc_state->wm.ilk.optimal; ilk_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } static void skl_wm_level_from_reg_val(u32 val, struct skl_wm_level *level) { level->enable = val & PLANE_WM_EN; level->ignore_lines = val & PLANE_WM_IGNORE_LINES; level->blocks = REG_FIELD_GET(PLANE_WM_BLOCKS_MASK, val); level->lines = REG_FIELD_GET(PLANE_WM_LINES_MASK, val); } static void skl_pipe_wm_get_hw_state(struct intel_crtc *crtc, struct skl_pipe_wm *out) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); enum pipe pipe = crtc->pipe; int level, max_level; enum plane_id plane_id; u32 val; max_level = ilk_wm_max_level(dev_priv); for_each_plane_id_on_crtc(crtc, plane_id) { struct skl_plane_wm *wm = &out->planes[plane_id]; for (level = 0; level <= max_level; level++) { if (plane_id != PLANE_CURSOR) val = intel_uncore_read(&dev_priv->uncore, PLANE_WM(pipe, plane_id, level)); else val = intel_uncore_read(&dev_priv->uncore, CUR_WM(pipe, level)); skl_wm_level_from_reg_val(val, &wm->wm[level]); } if (plane_id != PLANE_CURSOR) val = intel_uncore_read(&dev_priv->uncore, PLANE_WM_TRANS(pipe, plane_id)); else val = intel_uncore_read(&dev_priv->uncore, CUR_WM_TRANS(pipe)); skl_wm_level_from_reg_val(val, &wm->trans_wm); if (HAS_HW_SAGV_WM(dev_priv)) { if (plane_id != PLANE_CURSOR) val = intel_uncore_read(&dev_priv->uncore, PLANE_WM_SAGV(pipe, plane_id)); else val = intel_uncore_read(&dev_priv->uncore, CUR_WM_SAGV(pipe)); skl_wm_level_from_reg_val(val, &wm->sagv.wm0); if (plane_id != PLANE_CURSOR) val = intel_uncore_read(&dev_priv->uncore, PLANE_WM_SAGV_TRANS(pipe, plane_id)); else val = intel_uncore_read(&dev_priv->uncore, CUR_WM_SAGV_TRANS(pipe)); skl_wm_level_from_reg_val(val, &wm->sagv.trans_wm); } else if (DISPLAY_VER(dev_priv) >= 12) { wm->sagv.wm0 = wm->wm[0]; wm->sagv.trans_wm = wm->trans_wm; } } } void skl_wm_get_hw_state(struct drm_i915_private *dev_priv) { struct intel_dbuf_state *dbuf_state = to_intel_dbuf_state(dev_priv->dbuf.obj.state); struct intel_crtc *crtc; if (HAS_MBUS_JOINING(dev_priv)) dbuf_state->joined_mbus = intel_de_read(dev_priv, MBUS_CTL) & MBUS_JOIN; for_each_intel_crtc(&dev_priv->drm, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); enum pipe pipe = crtc->pipe; unsigned int mbus_offset; enum plane_id plane_id; u8 slices; memset(&crtc_state->wm.skl.optimal, 0, sizeof(crtc_state->wm.skl.optimal)); if (crtc_state->hw.active) skl_pipe_wm_get_hw_state(crtc, &crtc_state->wm.skl.optimal); crtc_state->wm.skl.raw = crtc_state->wm.skl.optimal; memset(&dbuf_state->ddb[pipe], 0, sizeof(dbuf_state->ddb[pipe])); for_each_plane_id_on_crtc(crtc, plane_id) { struct skl_ddb_entry *ddb = &crtc_state->wm.skl.plane_ddb[plane_id]; struct skl_ddb_entry *ddb_y = &crtc_state->wm.skl.plane_ddb_y[plane_id]; if (!crtc_state->hw.active) continue; skl_ddb_get_hw_plane_state(dev_priv, crtc->pipe, plane_id, ddb, ddb_y); skl_ddb_entry_union(&dbuf_state->ddb[pipe], ddb); skl_ddb_entry_union(&dbuf_state->ddb[pipe], ddb_y); } dbuf_state->weight[pipe] = intel_crtc_ddb_weight(crtc_state); /* * Used for checking overlaps, so we need absolute * offsets instead of MBUS relative offsets. */ slices = skl_compute_dbuf_slices(crtc, dbuf_state->active_pipes, dbuf_state->joined_mbus); mbus_offset = mbus_ddb_offset(dev_priv, slices); crtc_state->wm.skl.ddb.start = mbus_offset + dbuf_state->ddb[pipe].start; crtc_state->wm.skl.ddb.end = mbus_offset + dbuf_state->ddb[pipe].end; /* The slices actually used by the planes on the pipe */ dbuf_state->slices[pipe] = skl_ddb_dbuf_slice_mask(dev_priv, &crtc_state->wm.skl.ddb); drm_dbg_kms(&dev_priv->drm, "[CRTC:%d:%s] dbuf slices 0x%x, ddb (%d - %d), active pipes 0x%x, mbus joined: %s\n", crtc->base.base.id, crtc->base.name, dbuf_state->slices[pipe], dbuf_state->ddb[pipe].start, dbuf_state->ddb[pipe].end, dbuf_state->active_pipes, str_yes_no(dbuf_state->joined_mbus)); } dbuf_state->enabled_slices = dev_priv->dbuf.enabled_slices; } static bool skl_dbuf_is_misconfigured(struct drm_i915_private *i915) { const struct intel_dbuf_state *dbuf_state = to_intel_dbuf_state(i915->dbuf.obj.state); struct skl_ddb_entry entries[I915_MAX_PIPES] = {}; struct intel_crtc *crtc; for_each_intel_crtc(&i915->drm, crtc) { const struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); entries[crtc->pipe] = crtc_state->wm.skl.ddb; } for_each_intel_crtc(&i915->drm, crtc) { const struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); u8 slices; slices = skl_compute_dbuf_slices(crtc, dbuf_state->active_pipes, dbuf_state->joined_mbus); if (dbuf_state->slices[crtc->pipe] & ~slices) return true; if (skl_ddb_allocation_overlaps(&crtc_state->wm.skl.ddb, entries, I915_MAX_PIPES, crtc->pipe)) return true; } return false; } void skl_wm_sanitize(struct drm_i915_private *i915) { struct intel_crtc *crtc; /* * On TGL/RKL (at least) the BIOS likes to assign the planes * to the wrong DBUF slices. This will cause an infinite loop * in skl_commit_modeset_enables() as it can't find a way to * transition between the old bogus DBUF layout to the new * proper DBUF layout without DBUF allocation overlaps between * the planes (which cannot be allowed or else the hardware * may hang). If we detect a bogus DBUF layout just turn off * all the planes so that skl_commit_modeset_enables() can * simply ignore them. */ if (!skl_dbuf_is_misconfigured(i915)) return; drm_dbg_kms(&i915->drm, "BIOS has misprogrammed the DBUF, disabling all planes\n"); for_each_intel_crtc(&i915->drm, crtc) { struct intel_plane *plane = to_intel_plane(crtc->base.primary); const struct intel_plane_state *plane_state = to_intel_plane_state(plane->base.state); struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); if (plane_state->uapi.visible) intel_plane_disable_noatomic(crtc, plane); drm_WARN_ON(&i915->drm, crtc_state->active_planes != 0); memset(&crtc_state->wm.skl.ddb, 0, sizeof(crtc_state->wm.skl.ddb)); } } static void ilk_pipe_wm_get_hw_state(struct intel_crtc *crtc) { struct drm_device *dev = crtc->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct ilk_wm_values *hw = &dev_priv->wm.hw; struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct intel_pipe_wm *active = &crtc_state->wm.ilk.optimal; enum pipe pipe = crtc->pipe; hw->wm_pipe[pipe] = intel_uncore_read(&dev_priv->uncore, WM0_PIPE_ILK(pipe)); memset(active, 0, sizeof(*active)); active->pipe_enabled = crtc->active; if (active->pipe_enabled) { u32 tmp = hw->wm_pipe[pipe]; /* * For active pipes LP0 watermark is marked as * enabled, and LP1+ watermaks as disabled since * we can't really reverse compute them in case * multiple pipes are active. */ active->wm[0].enable = true; active->wm[0].pri_val = REG_FIELD_GET(WM0_PIPE_PRIMARY_MASK, tmp); active->wm[0].spr_val = REG_FIELD_GET(WM0_PIPE_SPRITE_MASK, tmp); active->wm[0].cur_val = REG_FIELD_GET(WM0_PIPE_CURSOR_MASK, tmp); } else { int level, max_level = ilk_wm_max_level(dev_priv); /* * For inactive pipes, all watermark levels * should be marked as enabled but zeroed, * which is what we'd compute them to. */ for (level = 0; level <= max_level; level++) active->wm[level].enable = true; } crtc->wm.active.ilk = *active; } #define _FW_WM(value, plane) \ (((value) & DSPFW_ ## plane ## _MASK) >> DSPFW_ ## plane ## _SHIFT) #define _FW_WM_VLV(value, plane) \ (((value) & DSPFW_ ## plane ## _MASK_VLV) >> DSPFW_ ## plane ## _SHIFT) static void g4x_read_wm_values(struct drm_i915_private *dev_priv, struct g4x_wm_values *wm) { u32 tmp; tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1); wm->sr.plane = _FW_WM(tmp, SR); wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB); wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEB); wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM(tmp, PLANEA); tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2); wm->fbc_en = tmp & DSPFW_FBC_SR_EN; wm->sr.fbc = _FW_WM(tmp, FBC_SR); wm->hpll.fbc = _FW_WM(tmp, FBC_HPLL_SR); wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEB); wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA); wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM(tmp, SPRITEA); tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3); wm->hpll_en = tmp & DSPFW_HPLL_SR_EN; wm->sr.cursor = _FW_WM(tmp, CURSOR_SR); wm->hpll.cursor = _FW_WM(tmp, HPLL_CURSOR); wm->hpll.plane = _FW_WM(tmp, HPLL_SR); } static void vlv_read_wm_values(struct drm_i915_private *dev_priv, struct vlv_wm_values *wm) { enum pipe pipe; u32 tmp; for_each_pipe(dev_priv, pipe) { tmp = intel_uncore_read(&dev_priv->uncore, VLV_DDL(pipe)); wm->ddl[pipe].plane[PLANE_PRIMARY] = (tmp >> DDL_PLANE_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK); wm->ddl[pipe].plane[PLANE_CURSOR] = (tmp >> DDL_CURSOR_SHIFT) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK); wm->ddl[pipe].plane[PLANE_SPRITE0] = (tmp >> DDL_SPRITE_SHIFT(0)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK); wm->ddl[pipe].plane[PLANE_SPRITE1] = (tmp >> DDL_SPRITE_SHIFT(1)) & (DDL_PRECISION_HIGH | DRAIN_LATENCY_MASK); } tmp = intel_uncore_read(&dev_priv->uncore, DSPFW1); wm->sr.plane = _FW_WM(tmp, SR); wm->pipe[PIPE_B].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORB); wm->pipe[PIPE_B].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEB); wm->pipe[PIPE_A].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEA); tmp = intel_uncore_read(&dev_priv->uncore, DSPFW2); wm->pipe[PIPE_A].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEB); wm->pipe[PIPE_A].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORA); wm->pipe[PIPE_A].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEA); tmp = intel_uncore_read(&dev_priv->uncore, DSPFW3); wm->sr.cursor = _FW_WM(tmp, CURSOR_SR); if (IS_CHERRYVIEW(dev_priv)) { tmp = intel_uncore_read(&dev_priv->uncore, DSPFW7_CHV); wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED); wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC); tmp = intel_uncore_read(&dev_priv->uncore, DSPFW8_CHV); wm->pipe[PIPE_C].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITEF); wm->pipe[PIPE_C].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEE); tmp = intel_uncore_read(&dev_priv->uncore, DSPFW9_CHV); wm->pipe[PIPE_C].plane[PLANE_PRIMARY] = _FW_WM_VLV(tmp, PLANEC); wm->pipe[PIPE_C].plane[PLANE_CURSOR] = _FW_WM(tmp, CURSORC); tmp = intel_uncore_read(&dev_priv->uncore, DSPHOWM); wm->sr.plane |= _FW_WM(tmp, SR_HI) << 9; wm->pipe[PIPE_C].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEF_HI) << 8; wm->pipe[PIPE_C].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEE_HI) << 8; wm->pipe[PIPE_C].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEC_HI) << 8; wm->pipe[PIPE_B].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITED_HI) << 8; wm->pipe[PIPE_B].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEC_HI) << 8; wm->pipe[PIPE_B].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEB_HI) << 8; wm->pipe[PIPE_A].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEB_HI) << 8; wm->pipe[PIPE_A].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEA_HI) << 8; wm->pipe[PIPE_A].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEA_HI) << 8; } else { tmp = intel_uncore_read(&dev_priv->uncore, DSPFW7); wm->pipe[PIPE_B].plane[PLANE_SPRITE1] = _FW_WM_VLV(tmp, SPRITED); wm->pipe[PIPE_B].plane[PLANE_SPRITE0] = _FW_WM_VLV(tmp, SPRITEC); tmp = intel_uncore_read(&dev_priv->uncore, DSPHOWM); wm->sr.plane |= _FW_WM(tmp, SR_HI) << 9; wm->pipe[PIPE_B].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITED_HI) << 8; wm->pipe[PIPE_B].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEC_HI) << 8; wm->pipe[PIPE_B].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEB_HI) << 8; wm->pipe[PIPE_A].plane[PLANE_SPRITE1] |= _FW_WM(tmp, SPRITEB_HI) << 8; wm->pipe[PIPE_A].plane[PLANE_SPRITE0] |= _FW_WM(tmp, SPRITEA_HI) << 8; wm->pipe[PIPE_A].plane[PLANE_PRIMARY] |= _FW_WM(tmp, PLANEA_HI) << 8; } } #undef _FW_WM #undef _FW_WM_VLV void g4x_wm_get_hw_state(struct drm_i915_private *dev_priv) { struct g4x_wm_values *wm = &dev_priv->wm.g4x; struct intel_crtc *crtc; g4x_read_wm_values(dev_priv, wm); wm->cxsr = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF) & FW_BLC_SELF_EN; for_each_intel_crtc(&dev_priv->drm, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct g4x_wm_state *active = &crtc->wm.active.g4x; struct g4x_pipe_wm *raw; enum pipe pipe = crtc->pipe; enum plane_id plane_id; int level, max_level; active->cxsr = wm->cxsr; active->hpll_en = wm->hpll_en; active->fbc_en = wm->fbc_en; active->sr = wm->sr; active->hpll = wm->hpll; for_each_plane_id_on_crtc(crtc, plane_id) { active->wm.plane[plane_id] = wm->pipe[pipe].plane[plane_id]; } if (wm->cxsr && wm->hpll_en) max_level = G4X_WM_LEVEL_HPLL; else if (wm->cxsr) max_level = G4X_WM_LEVEL_SR; else max_level = G4X_WM_LEVEL_NORMAL; level = G4X_WM_LEVEL_NORMAL; raw = &crtc_state->wm.g4x.raw[level]; for_each_plane_id_on_crtc(crtc, plane_id) raw->plane[plane_id] = active->wm.plane[plane_id]; level = G4X_WM_LEVEL_SR; if (level > max_level) goto out; raw = &crtc_state->wm.g4x.raw[level]; raw->plane[PLANE_PRIMARY] = active->sr.plane; raw->plane[PLANE_CURSOR] = active->sr.cursor; raw->plane[PLANE_SPRITE0] = 0; raw->fbc = active->sr.fbc; level = G4X_WM_LEVEL_HPLL; if (level > max_level) goto out; raw = &crtc_state->wm.g4x.raw[level]; raw->plane[PLANE_PRIMARY] = active->hpll.plane; raw->plane[PLANE_CURSOR] = active->hpll.cursor; raw->plane[PLANE_SPRITE0] = 0; raw->fbc = active->hpll.fbc; level++; out: for_each_plane_id_on_crtc(crtc, plane_id) g4x_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX); g4x_raw_fbc_wm_set(crtc_state, level, USHRT_MAX); crtc_state->wm.g4x.optimal = *active; crtc_state->wm.g4x.intermediate = *active; drm_dbg_kms(&dev_priv->drm, "Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite=%d\n", pipe_name(pipe), wm->pipe[pipe].plane[PLANE_PRIMARY], wm->pipe[pipe].plane[PLANE_CURSOR], wm->pipe[pipe].plane[PLANE_SPRITE0]); } drm_dbg_kms(&dev_priv->drm, "Initial SR watermarks: plane=%d, cursor=%d fbc=%d\n", wm->sr.plane, wm->sr.cursor, wm->sr.fbc); drm_dbg_kms(&dev_priv->drm, "Initial HPLL watermarks: plane=%d, SR cursor=%d fbc=%d\n", wm->hpll.plane, wm->hpll.cursor, wm->hpll.fbc); drm_dbg_kms(&dev_priv->drm, "Initial SR=%s HPLL=%s FBC=%s\n", str_yes_no(wm->cxsr), str_yes_no(wm->hpll_en), str_yes_no(wm->fbc_en)); } void g4x_wm_sanitize(struct drm_i915_private *dev_priv) { struct intel_plane *plane; struct intel_crtc *crtc; mutex_lock(&dev_priv->wm.wm_mutex); for_each_intel_plane(&dev_priv->drm, plane) { struct intel_crtc *crtc = intel_crtc_for_pipe(dev_priv, plane->pipe); struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct intel_plane_state *plane_state = to_intel_plane_state(plane->base.state); struct g4x_wm_state *wm_state = &crtc_state->wm.g4x.optimal; enum plane_id plane_id = plane->id; int level; if (plane_state->uapi.visible) continue; for (level = 0; level < 3; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level]; raw->plane[plane_id] = 0; wm_state->wm.plane[plane_id] = 0; } if (plane_id == PLANE_PRIMARY) { for (level = 0; level < 3; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.g4x.raw[level]; raw->fbc = 0; } wm_state->sr.fbc = 0; wm_state->hpll.fbc = 0; wm_state->fbc_en = false; } } for_each_intel_crtc(&dev_priv->drm, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); crtc_state->wm.g4x.intermediate = crtc_state->wm.g4x.optimal; crtc->wm.active.g4x = crtc_state->wm.g4x.optimal; } g4x_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } void vlv_wm_get_hw_state(struct drm_i915_private *dev_priv) { struct vlv_wm_values *wm = &dev_priv->wm.vlv; struct intel_crtc *crtc; u32 val; vlv_read_wm_values(dev_priv, wm); wm->cxsr = intel_uncore_read(&dev_priv->uncore, FW_BLC_SELF_VLV) & FW_CSPWRDWNEN; wm->level = VLV_WM_LEVEL_PM2; if (IS_CHERRYVIEW(dev_priv)) { vlv_punit_get(dev_priv); val = vlv_punit_read(dev_priv, PUNIT_REG_DSPSSPM); if (val & DSP_MAXFIFO_PM5_ENABLE) wm->level = VLV_WM_LEVEL_PM5; /* * If DDR DVFS is disabled in the BIOS, Punit * will never ack the request. So if that happens * assume we don't have to enable/disable DDR DVFS * dynamically. To test that just set the REQ_ACK * bit to poke the Punit, but don't change the * HIGH/LOW bits so that we don't actually change * the current state. */ val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2); val |= FORCE_DDR_FREQ_REQ_ACK; vlv_punit_write(dev_priv, PUNIT_REG_DDR_SETUP2, val); if (wait_for((vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2) & FORCE_DDR_FREQ_REQ_ACK) == 0, 3)) { drm_dbg_kms(&dev_priv->drm, "Punit not acking DDR DVFS request, " "assuming DDR DVFS is disabled\n"); dev_priv->wm.max_level = VLV_WM_LEVEL_PM5; } else { val = vlv_punit_read(dev_priv, PUNIT_REG_DDR_SETUP2); if ((val & FORCE_DDR_HIGH_FREQ) == 0) wm->level = VLV_WM_LEVEL_DDR_DVFS; } vlv_punit_put(dev_priv); } for_each_intel_crtc(&dev_priv->drm, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct vlv_wm_state *active = &crtc->wm.active.vlv; const struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; enum pipe pipe = crtc->pipe; enum plane_id plane_id; int level; vlv_get_fifo_size(crtc_state); active->num_levels = wm->level + 1; active->cxsr = wm->cxsr; for (level = 0; level < active->num_levels; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level]; active->sr[level].plane = wm->sr.plane; active->sr[level].cursor = wm->sr.cursor; for_each_plane_id_on_crtc(crtc, plane_id) { active->wm[level].plane[plane_id] = wm->pipe[pipe].plane[plane_id]; raw->plane[plane_id] = vlv_invert_wm_value(active->wm[level].plane[plane_id], fifo_state->plane[plane_id]); } } for_each_plane_id_on_crtc(crtc, plane_id) vlv_raw_plane_wm_set(crtc_state, level, plane_id, USHRT_MAX); vlv_invalidate_wms(crtc, active, level); crtc_state->wm.vlv.optimal = *active; crtc_state->wm.vlv.intermediate = *active; drm_dbg_kms(&dev_priv->drm, "Initial watermarks: pipe %c, plane=%d, cursor=%d, sprite0=%d, sprite1=%d\n", pipe_name(pipe), wm->pipe[pipe].plane[PLANE_PRIMARY], wm->pipe[pipe].plane[PLANE_CURSOR], wm->pipe[pipe].plane[PLANE_SPRITE0], wm->pipe[pipe].plane[PLANE_SPRITE1]); } drm_dbg_kms(&dev_priv->drm, "Initial watermarks: SR plane=%d, SR cursor=%d level=%d cxsr=%d\n", wm->sr.plane, wm->sr.cursor, wm->level, wm->cxsr); } void vlv_wm_sanitize(struct drm_i915_private *dev_priv) { struct intel_plane *plane; struct intel_crtc *crtc; mutex_lock(&dev_priv->wm.wm_mutex); for_each_intel_plane(&dev_priv->drm, plane) { struct intel_crtc *crtc = intel_crtc_for_pipe(dev_priv, plane->pipe); struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); struct intel_plane_state *plane_state = to_intel_plane_state(plane->base.state); struct vlv_wm_state *wm_state = &crtc_state->wm.vlv.optimal; const struct vlv_fifo_state *fifo_state = &crtc_state->wm.vlv.fifo_state; enum plane_id plane_id = plane->id; int level; if (plane_state->uapi.visible) continue; for (level = 0; level < wm_state->num_levels; level++) { struct g4x_pipe_wm *raw = &crtc_state->wm.vlv.raw[level]; raw->plane[plane_id] = 0; wm_state->wm[level].plane[plane_id] = vlv_invert_wm_value(raw->plane[plane_id], fifo_state->plane[plane_id]); } } for_each_intel_crtc(&dev_priv->drm, crtc) { struct intel_crtc_state *crtc_state = to_intel_crtc_state(crtc->base.state); crtc_state->wm.vlv.intermediate = crtc_state->wm.vlv.optimal; crtc->wm.active.vlv = crtc_state->wm.vlv.optimal; } vlv_program_watermarks(dev_priv); mutex_unlock(&dev_priv->wm.wm_mutex); } /* * FIXME should probably kill this and improve * the real watermark readout/sanitation instead */ static void ilk_init_lp_watermarks(struct drm_i915_private *dev_priv) { intel_uncore_write(&dev_priv->uncore, WM3_LP_ILK, intel_uncore_read(&dev_priv->uncore, WM3_LP_ILK) & ~WM_LP_ENABLE); intel_uncore_write(&dev_priv->uncore, WM2_LP_ILK, intel_uncore_read(&dev_priv->uncore, WM2_LP_ILK) & ~WM_LP_ENABLE); intel_uncore_write(&dev_priv->uncore, WM1_LP_ILK, intel_uncore_read(&dev_priv->uncore, WM1_LP_ILK) & ~WM_LP_ENABLE); /* * Don't touch WM_LP_SPRITE_ENABLE here. * Doing so could cause underruns. */ } void ilk_wm_get_hw_state(struct drm_i915_private *dev_priv) { struct ilk_wm_values *hw = &dev_priv->wm.hw; struct intel_crtc *crtc; ilk_init_lp_watermarks(dev_priv); for_each_intel_crtc(&dev_priv->drm, crtc) ilk_pipe_wm_get_hw_state(crtc); hw->wm_lp[0] = intel_uncore_read(&dev_priv->uncore, WM1_LP_ILK); hw->wm_lp[1] = intel_uncore_read(&dev_priv->uncore, WM2_LP_ILK); hw->wm_lp[2] = intel_uncore_read(&dev_priv->uncore, WM3_LP_ILK); hw->wm_lp_spr[0] = intel_uncore_read(&dev_priv->uncore, WM1S_LP_ILK); if (DISPLAY_VER(dev_priv) >= 7) { hw->wm_lp_spr[1] = intel_uncore_read(&dev_priv->uncore, WM2S_LP_IVB); hw->wm_lp_spr[2] = intel_uncore_read(&dev_priv->uncore, WM3S_LP_IVB); } if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) hw->partitioning = (intel_uncore_read(&dev_priv->uncore, WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ? INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2; else if (IS_IVYBRIDGE(dev_priv)) hw->partitioning = (intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL2) & DISP_DATA_PARTITION_5_6) ? INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2; hw->enable_fbc_wm = !(intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) & DISP_FBC_WM_DIS); } void intel_wm_state_verify(struct intel_crtc *crtc, struct intel_crtc_state *new_crtc_state) { struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); struct skl_hw_state { struct skl_ddb_entry ddb[I915_MAX_PLANES]; struct skl_ddb_entry ddb_y[I915_MAX_PLANES]; struct skl_pipe_wm wm; } *hw; const struct skl_pipe_wm *sw_wm = &new_crtc_state->wm.skl.optimal; int level, max_level = ilk_wm_max_level(dev_priv); struct intel_plane *plane; u8 hw_enabled_slices; if (DISPLAY_VER(dev_priv) < 9 || !new_crtc_state->hw.active) return; hw = kzalloc(sizeof(*hw), GFP_KERNEL); if (!hw) return; skl_pipe_wm_get_hw_state(crtc, &hw->wm); skl_pipe_ddb_get_hw_state(crtc, hw->ddb, hw->ddb_y); hw_enabled_slices = intel_enabled_dbuf_slices_mask(dev_priv); if (DISPLAY_VER(dev_priv) >= 11 && hw_enabled_slices != dev_priv->dbuf.enabled_slices) drm_err(&dev_priv->drm, "mismatch in DBUF Slices (expected 0x%x, got 0x%x)\n", dev_priv->dbuf.enabled_slices, hw_enabled_slices); for_each_intel_plane_on_crtc(&dev_priv->drm, crtc, plane) { const struct skl_ddb_entry *hw_ddb_entry, *sw_ddb_entry; const struct skl_wm_level *hw_wm_level, *sw_wm_level; /* Watermarks */ for (level = 0; level <= max_level; level++) { hw_wm_level = &hw->wm.planes[plane->id].wm[level]; sw_wm_level = skl_plane_wm_level(sw_wm, plane->id, level); if (skl_wm_level_equals(hw_wm_level, sw_wm_level)) continue; drm_err(&dev_priv->drm, "[PLANE:%d:%s] mismatch in WM%d (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n", plane->base.base.id, plane->base.name, level, sw_wm_level->enable, sw_wm_level->blocks, sw_wm_level->lines, hw_wm_level->enable, hw_wm_level->blocks, hw_wm_level->lines); } hw_wm_level = &hw->wm.planes[plane->id].trans_wm; sw_wm_level = skl_plane_trans_wm(sw_wm, plane->id); if (!skl_wm_level_equals(hw_wm_level, sw_wm_level)) { drm_err(&dev_priv->drm, "[PLANE:%d:%s] mismatch in trans WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n", plane->base.base.id, plane->base.name, sw_wm_level->enable, sw_wm_level->blocks, sw_wm_level->lines, hw_wm_level->enable, hw_wm_level->blocks, hw_wm_level->lines); } hw_wm_level = &hw->wm.planes[plane->id].sagv.wm0; sw_wm_level = &sw_wm->planes[plane->id].sagv.wm0; if (HAS_HW_SAGV_WM(dev_priv) && !skl_wm_level_equals(hw_wm_level, sw_wm_level)) { drm_err(&dev_priv->drm, "[PLANE:%d:%s] mismatch in SAGV WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n", plane->base.base.id, plane->base.name, sw_wm_level->enable, sw_wm_level->blocks, sw_wm_level->lines, hw_wm_level->enable, hw_wm_level->blocks, hw_wm_level->lines); } hw_wm_level = &hw->wm.planes[plane->id].sagv.trans_wm; sw_wm_level = &sw_wm->planes[plane->id].sagv.trans_wm; if (HAS_HW_SAGV_WM(dev_priv) && !skl_wm_level_equals(hw_wm_level, sw_wm_level)) { drm_err(&dev_priv->drm, "[PLANE:%d:%s] mismatch in SAGV trans WM (expected e=%d b=%u l=%u, got e=%d b=%u l=%u)\n", plane->base.base.id, plane->base.name, sw_wm_level->enable, sw_wm_level->blocks, sw_wm_level->lines, hw_wm_level->enable, hw_wm_level->blocks, hw_wm_level->lines); } /* DDB */ hw_ddb_entry = &hw->ddb[PLANE_CURSOR]; sw_ddb_entry = &new_crtc_state->wm.skl.plane_ddb[PLANE_CURSOR]; if (!skl_ddb_entry_equal(hw_ddb_entry, sw_ddb_entry)) { drm_err(&dev_priv->drm, "[PLANE:%d:%s] mismatch in DDB (expected (%u,%u), found (%u,%u))\n", plane->base.base.id, plane->base.name, sw_ddb_entry->start, sw_ddb_entry->end, hw_ddb_entry->start, hw_ddb_entry->end); } } kfree(hw); } void intel_enable_ipc(struct drm_i915_private *dev_priv) { u32 val; if (!HAS_IPC(dev_priv)) return; val = intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL2); if (dev_priv->ipc_enabled) val |= DISP_IPC_ENABLE; else val &= ~DISP_IPC_ENABLE; intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL2, val); } static bool intel_can_enable_ipc(struct drm_i915_private *dev_priv) { /* Display WA #0477 WaDisableIPC: skl */ if (IS_SKYLAKE(dev_priv)) return false; /* Display WA #1141: SKL:all KBL:all CFL */ if (IS_KABYLAKE(dev_priv) || IS_COFFEELAKE(dev_priv) || IS_COMETLAKE(dev_priv)) return dev_priv->dram_info.symmetric_memory; return true; } void intel_init_ipc(struct drm_i915_private *dev_priv) { if (!HAS_IPC(dev_priv)) return; dev_priv->ipc_enabled = intel_can_enable_ipc(dev_priv); intel_enable_ipc(dev_priv); } static void ibx_init_clock_gating(struct drm_i915_private *dev_priv) { /* * On Ibex Peak and Cougar Point, we need to disable clock * gating for the panel power sequencer or it will fail to * start up when no ports are active. */ intel_uncore_write(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); } static void g4x_disable_trickle_feed(struct drm_i915_private *dev_priv) { enum pipe pipe; for_each_pipe(dev_priv, pipe) { intel_uncore_write(&dev_priv->uncore, DSPCNTR(pipe), intel_uncore_read(&dev_priv->uncore, DSPCNTR(pipe)) | DISP_TRICKLE_FEED_DISABLE); intel_uncore_write(&dev_priv->uncore, DSPSURF(pipe), intel_uncore_read(&dev_priv->uncore, DSPSURF(pipe))); intel_uncore_posting_read(&dev_priv->uncore, DSPSURF(pipe)); } } static void ilk_init_clock_gating(struct drm_i915_private *dev_priv) { u32 dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; /* * Required for FBC * WaFbcDisableDpfcClockGating:ilk */ dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE | ILK_DPFCUNIT_CLOCK_GATE_DISABLE | ILK_DPFDUNIT_CLOCK_GATE_ENABLE; intel_uncore_write(&dev_priv->uncore, PCH_3DCGDIS0, MARIUNIT_CLOCK_GATE_DISABLE | SVSMUNIT_CLOCK_GATE_DISABLE); intel_uncore_write(&dev_priv->uncore, PCH_3DCGDIS1, VFMUNIT_CLOCK_GATE_DISABLE); /* * According to the spec the following bits should be set in * order to enable memory self-refresh * The bit 22/21 of 0x42004 * The bit 5 of 0x42020 * The bit 15 of 0x45000 */ intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2, (intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2) | ILK_DPARB_GATE | ILK_VSDPFD_FULL)); dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE; intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, (intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) | DISP_FBC_WM_DIS)); /* * Based on the document from hardware guys the following bits * should be set unconditionally in order to enable FBC. * The bit 22 of 0x42000 * The bit 22 of 0x42004 * The bit 7,8,9 of 0x42020. */ if (IS_IRONLAKE_M(dev_priv)) { /* WaFbcAsynchFlipDisableFbcQueue:ilk */ intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN1, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN1) | ILK_FBCQ_DIS); intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2) | ILK_DPARB_GATE); } intel_uncore_write(&dev_priv->uncore, ILK_DSPCLK_GATE_D, dspclk_gate); intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2) | ILK_ELPIN_409_SELECT); g4x_disable_trickle_feed(dev_priv); ibx_init_clock_gating(dev_priv); } static void cpt_init_clock_gating(struct drm_i915_private *dev_priv) { enum pipe pipe; u32 val; /* * On Ibex Peak and Cougar Point, we need to disable clock * gating for the panel power sequencer or it will fail to * start up when no ports are active. */ intel_uncore_write(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE | PCH_DPLUNIT_CLOCK_GATE_DISABLE | PCH_CPUNIT_CLOCK_GATE_DISABLE); intel_uncore_write(&dev_priv->uncore, SOUTH_CHICKEN2, intel_uncore_read(&dev_priv->uncore, SOUTH_CHICKEN2) | DPLS_EDP_PPS_FIX_DIS); /* The below fixes the weird display corruption, a few pixels shifted * downward, on (only) LVDS of some HP laptops with IVY. */ for_each_pipe(dev_priv, pipe) { val = intel_uncore_read(&dev_priv->uncore, TRANS_CHICKEN2(pipe)); val |= TRANS_CHICKEN2_TIMING_OVERRIDE; val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED; if (dev_priv->vbt.fdi_rx_polarity_inverted) val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED; val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER; val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH; intel_uncore_write(&dev_priv->uncore, TRANS_CHICKEN2(pipe), val); } /* WADP0ClockGatingDisable */ for_each_pipe(dev_priv, pipe) { intel_uncore_write(&dev_priv->uncore, TRANS_CHICKEN1(pipe), TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); } } static void gen6_check_mch_setup(struct drm_i915_private *dev_priv) { u32 tmp; tmp = intel_uncore_read(&dev_priv->uncore, MCH_SSKPD); if (REG_FIELD_GET(SSKPD_WM0_MASK_SNB, tmp) != 12) drm_dbg_kms(&dev_priv->drm, "Wrong MCH_SSKPD value: 0x%08x This can cause underruns.\n", tmp); } static void gen6_init_clock_gating(struct drm_i915_private *dev_priv) { u32 dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE; intel_uncore_write(&dev_priv->uncore, ILK_DSPCLK_GATE_D, dspclk_gate); intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2) | ILK_ELPIN_409_SELECT); intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL1, intel_uncore_read(&dev_priv->uncore, GEN6_UCGCTL1) | GEN6_BLBUNIT_CLOCK_GATE_DISABLE | GEN6_CSUNIT_CLOCK_GATE_DISABLE); /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock * gating disable must be set. Failure to set it results in * flickering pixels due to Z write ordering failures after * some amount of runtime in the Mesa "fire" demo, and Unigine * Sanctuary and Tropics, and apparently anything else with * alpha test or pixel discard. * * According to the spec, bit 11 (RCCUNIT) must also be set, * but we didn't debug actual testcases to find it out. * * WaDisableRCCUnitClockGating:snb * WaDisableRCPBUnitClockGating:snb */ intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL2, GEN6_RCPBUNIT_CLOCK_GATE_DISABLE | GEN6_RCCUNIT_CLOCK_GATE_DISABLE); /* * According to the spec the following bits should be * set in order to enable memory self-refresh and fbc: * The bit21 and bit22 of 0x42000 * The bit21 and bit22 of 0x42004 * The bit5 and bit7 of 0x42020 * The bit14 of 0x70180 * The bit14 of 0x71180 * * WaFbcAsynchFlipDisableFbcQueue:snb */ intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN1, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN1) | ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS); intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN2) | ILK_DPARB_GATE | ILK_VSDPFD_FULL); intel_uncore_write(&dev_priv->uncore, ILK_DSPCLK_GATE_D, intel_uncore_read(&dev_priv->uncore, ILK_DSPCLK_GATE_D) | ILK_DPARBUNIT_CLOCK_GATE_ENABLE | ILK_DPFDUNIT_CLOCK_GATE_ENABLE); g4x_disable_trickle_feed(dev_priv); cpt_init_clock_gating(dev_priv); gen6_check_mch_setup(dev_priv); } static void lpt_init_clock_gating(struct drm_i915_private *dev_priv) { /* * TODO: this bit should only be enabled when really needed, then * disabled when not needed anymore in order to save power. */ if (HAS_PCH_LPT_LP(dev_priv)) intel_uncore_write(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D, intel_uncore_read(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D) | PCH_LP_PARTITION_LEVEL_DISABLE); /* WADPOClockGatingDisable:hsw */ intel_uncore_write(&dev_priv->uncore, TRANS_CHICKEN1(PIPE_A), intel_uncore_read(&dev_priv->uncore, TRANS_CHICKEN1(PIPE_A)) | TRANS_CHICKEN1_DP0UNIT_GC_DISABLE); } static void lpt_suspend_hw(struct drm_i915_private *dev_priv) { if (HAS_PCH_LPT_LP(dev_priv)) { u32 val = intel_uncore_read(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D); val &= ~PCH_LP_PARTITION_LEVEL_DISABLE; intel_uncore_write(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D, val); } } static void gen8_set_l3sqc_credits(struct drm_i915_private *dev_priv, int general_prio_credits, int high_prio_credits) { u32 misccpctl; u32 val; /* WaTempDisableDOPClkGating:bdw */ misccpctl = intel_uncore_read(&dev_priv->uncore, GEN7_MISCCPCTL); intel_uncore_write(&dev_priv->uncore, GEN7_MISCCPCTL, misccpctl & ~GEN7_DOP_CLOCK_GATE_ENABLE); val = intel_uncore_read(&dev_priv->uncore, GEN8_L3SQCREG1); val &= ~L3_PRIO_CREDITS_MASK; val |= L3_GENERAL_PRIO_CREDITS(general_prio_credits); val |= L3_HIGH_PRIO_CREDITS(high_prio_credits); intel_uncore_write(&dev_priv->uncore, GEN8_L3SQCREG1, val); /* * Wait at least 100 clocks before re-enabling clock gating. * See the definition of L3SQCREG1 in BSpec. */ intel_uncore_posting_read(&dev_priv->uncore, GEN8_L3SQCREG1); udelay(1); intel_uncore_write(&dev_priv->uncore, GEN7_MISCCPCTL, misccpctl); } static void icl_init_clock_gating(struct drm_i915_private *dev_priv) { /* Wa_1409120013:icl,ehl */ intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), DPFC_CHICKEN_COMP_DUMMY_PIXEL); /*Wa_14010594013:icl, ehl */ intel_uncore_rmw(&dev_priv->uncore, GEN8_CHICKEN_DCPR_1, 0, ICL_DELAY_PMRSP); } static void gen12lp_init_clock_gating(struct drm_i915_private *dev_priv) { /* Wa_1409120013:tgl,rkl,adl-s,dg1,dg2 */ if (IS_TIGERLAKE(dev_priv) || IS_ROCKETLAKE(dev_priv) || IS_ALDERLAKE_S(dev_priv) || IS_DG1(dev_priv) || IS_DG2(dev_priv)) intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), DPFC_CHICKEN_COMP_DUMMY_PIXEL); /* Wa_1409825376:tgl (pre-prod)*/ if (IS_TGL_DISPLAY_STEP(dev_priv, STEP_A0, STEP_C0)) intel_uncore_write(&dev_priv->uncore, GEN9_CLKGATE_DIS_3, intel_uncore_read(&dev_priv->uncore, GEN9_CLKGATE_DIS_3) | TGL_VRH_GATING_DIS); /* Wa_14013723622:tgl,rkl,dg1,adl-s */ if (DISPLAY_VER(dev_priv) == 12) intel_uncore_rmw(&dev_priv->uncore, CLKREQ_POLICY, CLKREQ_POLICY_MEM_UP_OVRD, 0); } static void adlp_init_clock_gating(struct drm_i915_private *dev_priv) { gen12lp_init_clock_gating(dev_priv); /* Wa_22011091694:adlp */ intel_de_rmw(dev_priv, GEN9_CLKGATE_DIS_5, 0, DPCE_GATING_DIS); /* Bspec/49189 Initialize Sequence */ intel_de_rmw(dev_priv, GEN8_CHICKEN_DCPR_1, DDI_CLOCK_REG_ACCESS, 0); } static void dg1_init_clock_gating(struct drm_i915_private *dev_priv) { gen12lp_init_clock_gating(dev_priv); /* Wa_1409836686:dg1[a0] */ if (IS_DG1_GRAPHICS_STEP(dev_priv, STEP_A0, STEP_B0)) intel_uncore_write(&dev_priv->uncore, GEN9_CLKGATE_DIS_3, intel_uncore_read(&dev_priv->uncore, GEN9_CLKGATE_DIS_3) | DPT_GATING_DIS); } static void xehpsdv_init_clock_gating(struct drm_i915_private *dev_priv) { /* Wa_22010146351:xehpsdv */ if (IS_XEHPSDV_GRAPHICS_STEP(dev_priv, STEP_A0, STEP_B0)) intel_uncore_rmw(&dev_priv->uncore, XEHP_CLOCK_GATE_DIS, 0, SGR_DIS); } static void dg2_init_clock_gating(struct drm_i915_private *i915) { /* Wa_22010954014:dg2 */ intel_uncore_rmw(&i915->uncore, XEHP_CLOCK_GATE_DIS, 0, SGSI_SIDECLK_DIS); /* * Wa_14010733611:dg2_g10 * Wa_22010146351:dg2_g10 */ if (IS_DG2_GRAPHICS_STEP(i915, G10, STEP_A0, STEP_B0)) intel_uncore_rmw(&i915->uncore, XEHP_CLOCK_GATE_DIS, 0, SGR_DIS | SGGI_DIS); } static void pvc_init_clock_gating(struct drm_i915_private *dev_priv) { /* Wa_14012385139:pvc */ if (IS_PVC_BD_STEP(dev_priv, STEP_A0, STEP_B0)) intel_uncore_rmw(&dev_priv->uncore, XEHP_CLOCK_GATE_DIS, 0, SGR_DIS); /* Wa_22010954014:pvc */ if (IS_PVC_BD_STEP(dev_priv, STEP_A0, STEP_B0)) intel_uncore_rmw(&dev_priv->uncore, XEHP_CLOCK_GATE_DIS, 0, SGSI_SIDECLK_DIS); } static void cnp_init_clock_gating(struct drm_i915_private *dev_priv) { if (!HAS_PCH_CNP(dev_priv)) return; /* Display WA #1181 WaSouthDisplayDisablePWMCGEGating: cnp */ intel_uncore_write(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D, intel_uncore_read(&dev_priv->uncore, SOUTH_DSPCLK_GATE_D) | CNP_PWM_CGE_GATING_DISABLE); } static void cfl_init_clock_gating(struct drm_i915_private *dev_priv) { cnp_init_clock_gating(dev_priv); gen9_init_clock_gating(dev_priv); /* WAC6entrylatency:cfl */ intel_uncore_write(&dev_priv->uncore, FBC_LLC_READ_CTRL, intel_uncore_read(&dev_priv->uncore, FBC_LLC_READ_CTRL) | FBC_LLC_FULLY_OPEN); /* * WaFbcTurnOffFbcWatermark:cfl * Display WA #0562: cfl */ intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) | DISP_FBC_WM_DIS); /* * WaFbcNukeOnHostModify:cfl * Display WA #0873: cfl */ intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), intel_uncore_read(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A)) | DPFC_NUKE_ON_ANY_MODIFICATION); } static void kbl_init_clock_gating(struct drm_i915_private *dev_priv) { gen9_init_clock_gating(dev_priv); /* WAC6entrylatency:kbl */ intel_uncore_write(&dev_priv->uncore, FBC_LLC_READ_CTRL, intel_uncore_read(&dev_priv->uncore, FBC_LLC_READ_CTRL) | FBC_LLC_FULLY_OPEN); /* WaDisableSDEUnitClockGating:kbl */ if (IS_KBL_GRAPHICS_STEP(dev_priv, 0, STEP_C0)) intel_uncore_write(&dev_priv->uncore, GEN8_UCGCTL6, intel_uncore_read(&dev_priv->uncore, GEN8_UCGCTL6) | GEN8_SDEUNIT_CLOCK_GATE_DISABLE); /* WaDisableGamClockGating:kbl */ if (IS_KBL_GRAPHICS_STEP(dev_priv, 0, STEP_C0)) intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL1, intel_uncore_read(&dev_priv->uncore, GEN6_UCGCTL1) | GEN6_GAMUNIT_CLOCK_GATE_DISABLE); /* * WaFbcTurnOffFbcWatermark:kbl * Display WA #0562: kbl */ intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) | DISP_FBC_WM_DIS); /* * WaFbcNukeOnHostModify:kbl * Display WA #0873: kbl */ intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), intel_uncore_read(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A)) | DPFC_NUKE_ON_ANY_MODIFICATION); } static void skl_init_clock_gating(struct drm_i915_private *dev_priv) { gen9_init_clock_gating(dev_priv); /* WaDisableDopClockGating:skl */ intel_uncore_write(&dev_priv->uncore, GEN7_MISCCPCTL, intel_uncore_read(&dev_priv->uncore, GEN7_MISCCPCTL) & ~GEN7_DOP_CLOCK_GATE_ENABLE); /* WAC6entrylatency:skl */ intel_uncore_write(&dev_priv->uncore, FBC_LLC_READ_CTRL, intel_uncore_read(&dev_priv->uncore, FBC_LLC_READ_CTRL) | FBC_LLC_FULLY_OPEN); /* * WaFbcTurnOffFbcWatermark:skl * Display WA #0562: skl */ intel_uncore_write(&dev_priv->uncore, DISP_ARB_CTL, intel_uncore_read(&dev_priv->uncore, DISP_ARB_CTL) | DISP_FBC_WM_DIS); /* * WaFbcNukeOnHostModify:skl * Display WA #0873: skl */ intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), intel_uncore_read(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A)) | DPFC_NUKE_ON_ANY_MODIFICATION); /* * WaFbcHighMemBwCorruptionAvoidance:skl * Display WA #0883: skl */ intel_uncore_write(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A), intel_uncore_read(&dev_priv->uncore, ILK_DPFC_CHICKEN(INTEL_FBC_A)) | DPFC_DISABLE_DUMMY0); } static void bdw_init_clock_gating(struct drm_i915_private *dev_priv) { enum pipe pipe; /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PIPESL_1(PIPE_A), intel_uncore_read(&dev_priv->uncore, CHICKEN_PIPESL_1(PIPE_A)) | HSW_FBCQ_DIS); /* WaSwitchSolVfFArbitrationPriority:bdw */ intel_uncore_write(&dev_priv->uncore, GAM_ECOCHK, intel_uncore_read(&dev_priv->uncore, GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL); /* WaPsrDPAMaskVBlankInSRD:bdw */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PAR1_1, intel_uncore_read(&dev_priv->uncore, CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD); for_each_pipe(dev_priv, pipe) { /* WaPsrDPRSUnmaskVBlankInSRD:bdw */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PIPESL_1(pipe), intel_uncore_read(&dev_priv->uncore, CHICKEN_PIPESL_1(pipe)) | BDW_DPRS_MASK_VBLANK_SRD); } /* WaVSRefCountFullforceMissDisable:bdw */ /* WaDSRefCountFullforceMissDisable:bdw */ intel_uncore_write(&dev_priv->uncore, GEN7_FF_THREAD_MODE, intel_uncore_read(&dev_priv->uncore, GEN7_FF_THREAD_MODE) & ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME)); intel_uncore_write(&dev_priv->uncore, RING_PSMI_CTL(RENDER_RING_BASE), _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE)); /* WaDisableSDEUnitClockGating:bdw */ intel_uncore_write(&dev_priv->uncore, GEN8_UCGCTL6, intel_uncore_read(&dev_priv->uncore, GEN8_UCGCTL6) | GEN8_SDEUNIT_CLOCK_GATE_DISABLE); /* WaProgramL3SqcReg1Default:bdw */ gen8_set_l3sqc_credits(dev_priv, 30, 2); /* WaKVMNotificationOnConfigChange:bdw */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PAR2_1, intel_uncore_read(&dev_priv->uncore, CHICKEN_PAR2_1) | KVM_CONFIG_CHANGE_NOTIFICATION_SELECT); lpt_init_clock_gating(dev_priv); /* WaDisableDopClockGating:bdw * * Also see the CHICKEN2 write in bdw_init_workarounds() to disable DOP * clock gating. */ intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL1, intel_uncore_read(&dev_priv->uncore, GEN6_UCGCTL1) | GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE); } static void hsw_init_clock_gating(struct drm_i915_private *dev_priv) { /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */ intel_uncore_write(&dev_priv->uncore, CHICKEN_PIPESL_1(PIPE_A), intel_uncore_read(&dev_priv->uncore, CHICKEN_PIPESL_1(PIPE_A)) | HSW_FBCQ_DIS); /* This is required by WaCatErrorRejectionIssue:hsw */ intel_uncore_write(&dev_priv->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, intel_uncore_read(&dev_priv->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); /* WaSwitchSolVfFArbitrationPriority:hsw */ intel_uncore_write(&dev_priv->uncore, GAM_ECOCHK, intel_uncore_read(&dev_priv->uncore, GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL); lpt_init_clock_gating(dev_priv); } static void ivb_init_clock_gating(struct drm_i915_private *dev_priv) { u32 snpcr; intel_uncore_write(&dev_priv->uncore, ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE); /* WaFbcAsynchFlipDisableFbcQueue:ivb */ intel_uncore_write(&dev_priv->uncore, ILK_DISPLAY_CHICKEN1, intel_uncore_read(&dev_priv->uncore, ILK_DISPLAY_CHICKEN1) | ILK_FBCQ_DIS); /* WaDisableBackToBackFlipFix:ivb */ intel_uncore_write(&dev_priv->uncore, IVB_CHICKEN3, CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | CHICKEN3_DGMG_DONE_FIX_DISABLE); if (IS_IVB_GT1(dev_priv)) intel_uncore_write(&dev_priv->uncore, GEN7_ROW_CHICKEN2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); else { /* must write both registers */ intel_uncore_write(&dev_priv->uncore, GEN7_ROW_CHICKEN2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); intel_uncore_write(&dev_priv->uncore, GEN7_ROW_CHICKEN2_GT2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); } /* * According to the spec, bit 13 (RCZUNIT) must be set on IVB. * This implements the WaDisableRCZUnitClockGating:ivb workaround. */ intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); /* This is required by WaCatErrorRejectionIssue:ivb */ intel_uncore_write(&dev_priv->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, intel_uncore_read(&dev_priv->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); g4x_disable_trickle_feed(dev_priv); snpcr = intel_uncore_read(&dev_priv->uncore, GEN6_MBCUNIT_SNPCR); snpcr &= ~GEN6_MBC_SNPCR_MASK; snpcr |= GEN6_MBC_SNPCR_MED; intel_uncore_write(&dev_priv->uncore, GEN6_MBCUNIT_SNPCR, snpcr); if (!HAS_PCH_NOP(dev_priv)) cpt_init_clock_gating(dev_priv); gen6_check_mch_setup(dev_priv); } static void vlv_init_clock_gating(struct drm_i915_private *dev_priv) { /* WaDisableBackToBackFlipFix:vlv */ intel_uncore_write(&dev_priv->uncore, IVB_CHICKEN3, CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE | CHICKEN3_DGMG_DONE_FIX_DISABLE); /* WaDisableDopClockGating:vlv */ intel_uncore_write(&dev_priv->uncore, GEN7_ROW_CHICKEN2, _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE)); /* This is required by WaCatErrorRejectionIssue:vlv */ intel_uncore_write(&dev_priv->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG, intel_uncore_read(&dev_priv->uncore, GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) | GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB); /* * According to the spec, bit 13 (RCZUNIT) must be set on IVB. * This implements the WaDisableRCZUnitClockGating:vlv workaround. */ intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE); /* WaDisableL3Bank2xClockGate:vlv * Disabling L3 clock gating- MMIO 940c[25] = 1 * Set bit 25, to disable L3_BANK_2x_CLK_GATING */ intel_uncore_write(&dev_priv->uncore, GEN7_UCGCTL4, intel_uncore_read(&dev_priv->uncore, GEN7_UCGCTL4) | GEN7_L3BANK2X_CLOCK_GATE_DISABLE); /* * WaDisableVLVClockGating_VBIIssue:vlv * Disable clock gating on th GCFG unit to prevent a delay * in the reporting of vblank events. */ intel_uncore_write(&dev_priv->uncore, VLV_GUNIT_CLOCK_GATE, GCFG_DIS); } static void chv_init_clock_gating(struct drm_i915_private *dev_priv) { /* WaVSRefCountFullforceMissDisable:chv */ /* WaDSRefCountFullforceMissDisable:chv */ intel_uncore_write(&dev_priv->uncore, GEN7_FF_THREAD_MODE, intel_uncore_read(&dev_priv->uncore, GEN7_FF_THREAD_MODE) & ~(GEN8_FF_DS_REF_CNT_FFME | GEN7_FF_VS_REF_CNT_FFME)); /* WaDisableSemaphoreAndSyncFlipWait:chv */ intel_uncore_write(&dev_priv->uncore, RING_PSMI_CTL(RENDER_RING_BASE), _MASKED_BIT_ENABLE(GEN8_RC_SEMA_IDLE_MSG_DISABLE)); /* WaDisableCSUnitClockGating:chv */ intel_uncore_write(&dev_priv->uncore, GEN6_UCGCTL1, intel_uncore_read(&dev_priv->uncore, GEN6_UCGCTL1) | GEN6_CSUNIT_CLOCK_GATE_DISABLE); /* WaDisableSDEUnitClockGating:chv */ intel_uncore_write(&dev_priv->uncore, GEN8_UCGCTL6, intel_uncore_read(&dev_priv->uncore, GEN8_UCGCTL6) | GEN8_SDEUNIT_CLOCK_GATE_DISABLE); /* * WaProgramL3SqcReg1Default:chv * See gfxspecs/Related Documents/Performance Guide/ * LSQC Setting Recommendations. */ gen8_set_l3sqc_credits(dev_priv, 38, 2); } static void g4x_init_clock_gating(struct drm_i915_private *dev_priv) { u32 dspclk_gate; intel_uncore_write(&dev_priv->uncore, RENCLK_GATE_D1, 0); intel_uncore_write(&dev_priv->uncore, RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE | GS_UNIT_CLOCK_GATE_DISABLE | CL_UNIT_CLOCK_GATE_DISABLE); intel_uncore_write(&dev_priv->uncore, RAMCLK_GATE_D, 0); dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE | OVRUNIT_CLOCK_GATE_DISABLE | OVCUNIT_CLOCK_GATE_DISABLE; if (IS_GM45(dev_priv)) dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE; intel_uncore_write(&dev_priv->uncore, DSPCLK_GATE_D, dspclk_gate); g4x_disable_trickle_feed(dev_priv); } static void i965gm_init_clock_gating(struct drm_i915_private *dev_priv) { struct intel_uncore *uncore = &dev_priv->uncore; intel_uncore_write(uncore, RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE); intel_uncore_write(uncore, RENCLK_GATE_D2, 0); intel_uncore_write(uncore, DSPCLK_GATE_D, 0); intel_uncore_write(uncore, RAMCLK_GATE_D, 0); intel_uncore_write16(uncore, DEUC, 0); intel_uncore_write(uncore, MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); } static void i965g_init_clock_gating(struct drm_i915_private *dev_priv) { intel_uncore_write(&dev_priv->uncore, RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE | I965_RCC_CLOCK_GATE_DISABLE | I965_RCPB_CLOCK_GATE_DISABLE | I965_ISC_CLOCK_GATE_DISABLE | I965_FBC_CLOCK_GATE_DISABLE); intel_uncore_write(&dev_priv->uncore, RENCLK_GATE_D2, 0); intel_uncore_write(&dev_priv->uncore, MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); } static void gen3_init_clock_gating(struct drm_i915_private *dev_priv) { u32 dstate = intel_uncore_read(&dev_priv->uncore, D_STATE); dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING | DSTATE_DOT_CLOCK_GATING; intel_uncore_write(&dev_priv->uncore, D_STATE, dstate); if (IS_PINEVIEW(dev_priv)) intel_uncore_write(&dev_priv->uncore, ECOSKPD(RENDER_RING_BASE), _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY)); /* IIR "flip pending" means done if this bit is set */ intel_uncore_write(&dev_priv->uncore, ECOSKPD(RENDER_RING_BASE), _MASKED_BIT_DISABLE(ECO_FLIP_DONE)); /* interrupts should cause a wake up from C3 */ intel_uncore_write(&dev_priv->uncore, INSTPM, _MASKED_BIT_ENABLE(INSTPM_AGPBUSY_INT_EN)); /* On GEN3 we really need to make sure the ARB C3 LP bit is set */ intel_uncore_write(&dev_priv->uncore, MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_C3_LP_WRITE_ENABLE)); intel_uncore_write(&dev_priv->uncore, MI_ARB_STATE, _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE)); } static void i85x_init_clock_gating(struct drm_i915_private *dev_priv) { intel_uncore_write(&dev_priv->uncore, RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE); /* interrupts should cause a wake up from C3 */ intel_uncore_write(&dev_priv->uncore, MI_STATE, _MASKED_BIT_ENABLE(MI_AGPBUSY_INT_EN) | _MASKED_BIT_DISABLE(MI_AGPBUSY_830_MODE)); intel_uncore_write(&dev_priv->uncore, MEM_MODE, _MASKED_BIT_ENABLE(MEM_DISPLAY_TRICKLE_FEED_DISABLE)); /* * Have FBC ignore 3D activity since we use software * render tracking, and otherwise a pure 3D workload * (even if it just renders a single frame and then does * abosultely nothing) would not allow FBC to recompress * until a 2D blit occurs. */ intel_uncore_write(&dev_priv->uncore, SCPD0, _MASKED_BIT_ENABLE(SCPD_FBC_IGNORE_3D)); } static void i830_init_clock_gating(struct drm_i915_private *dev_priv) { intel_uncore_write(&dev_priv->uncore, MEM_MODE, _MASKED_BIT_ENABLE(MEM_DISPLAY_A_TRICKLE_FEED_DISABLE) | _MASKED_BIT_ENABLE(MEM_DISPLAY_B_TRICKLE_FEED_DISABLE)); } void intel_init_clock_gating(struct drm_i915_private *dev_priv) { dev_priv->clock_gating_funcs->init_clock_gating(dev_priv); } void intel_suspend_hw(struct drm_i915_private *dev_priv) { if (HAS_PCH_LPT(dev_priv)) lpt_suspend_hw(dev_priv); } static void nop_init_clock_gating(struct drm_i915_private *dev_priv) { drm_dbg_kms(&dev_priv->drm, "No clock gating settings or workarounds applied.\n"); } #define CG_FUNCS(platform) \ static const struct drm_i915_clock_gating_funcs platform##_clock_gating_funcs = { \ .init_clock_gating = platform##_init_clock_gating, \ } CG_FUNCS(pvc); CG_FUNCS(dg2); CG_FUNCS(xehpsdv); CG_FUNCS(adlp); CG_FUNCS(dg1); CG_FUNCS(gen12lp); CG_FUNCS(icl); CG_FUNCS(cfl); CG_FUNCS(skl); CG_FUNCS(kbl); CG_FUNCS(bxt); CG_FUNCS(glk); CG_FUNCS(bdw); CG_FUNCS(chv); CG_FUNCS(hsw); CG_FUNCS(ivb); CG_FUNCS(vlv); CG_FUNCS(gen6); CG_FUNCS(ilk); CG_FUNCS(g4x); CG_FUNCS(i965gm); CG_FUNCS(i965g); CG_FUNCS(gen3); CG_FUNCS(i85x); CG_FUNCS(i830); CG_FUNCS(nop); #undef CG_FUNCS /** * intel_init_clock_gating_hooks - setup the clock gating hooks * @dev_priv: device private * * Setup the hooks that configure which clocks of a given platform can be * gated and also apply various GT and display specific workarounds for these * platforms. Note that some GT specific workarounds are applied separately * when GPU contexts or batchbuffers start their execution. */ void intel_init_clock_gating_hooks(struct drm_i915_private *dev_priv) { if (IS_PONTEVECCHIO(dev_priv)) dev_priv->clock_gating_funcs = &pvc_clock_gating_funcs; else if (IS_DG2(dev_priv)) dev_priv->clock_gating_funcs = &dg2_clock_gating_funcs; else if (IS_XEHPSDV(dev_priv)) dev_priv->clock_gating_funcs = &xehpsdv_clock_gating_funcs; else if (IS_ALDERLAKE_P(dev_priv)) dev_priv->clock_gating_funcs = &adlp_clock_gating_funcs; else if (IS_DG1(dev_priv)) dev_priv->clock_gating_funcs = &dg1_clock_gating_funcs; else if (GRAPHICS_VER(dev_priv) == 12) dev_priv->clock_gating_funcs = &gen12lp_clock_gating_funcs; else if (GRAPHICS_VER(dev_priv) == 11) dev_priv->clock_gating_funcs = &icl_clock_gating_funcs; else if (IS_COFFEELAKE(dev_priv) || IS_COMETLAKE(dev_priv)) dev_priv->clock_gating_funcs = &cfl_clock_gating_funcs; else if (IS_SKYLAKE(dev_priv)) dev_priv->clock_gating_funcs = &skl_clock_gating_funcs; else if (IS_KABYLAKE(dev_priv)) dev_priv->clock_gating_funcs = &kbl_clock_gating_funcs; else if (IS_BROXTON(dev_priv)) dev_priv->clock_gating_funcs = &bxt_clock_gating_funcs; else if (IS_GEMINILAKE(dev_priv)) dev_priv->clock_gating_funcs = &glk_clock_gating_funcs; else if (IS_BROADWELL(dev_priv)) dev_priv->clock_gating_funcs = &bdw_clock_gating_funcs; else if (IS_CHERRYVIEW(dev_priv)) dev_priv->clock_gating_funcs = &chv_clock_gating_funcs; else if (IS_HASWELL(dev_priv)) dev_priv->clock_gating_funcs = &hsw_clock_gating_funcs; else if (IS_IVYBRIDGE(dev_priv)) dev_priv->clock_gating_funcs = &ivb_clock_gating_funcs; else if (IS_VALLEYVIEW(dev_priv)) dev_priv->clock_gating_funcs = &vlv_clock_gating_funcs; else if (GRAPHICS_VER(dev_priv) == 6) dev_priv->clock_gating_funcs = &gen6_clock_gating_funcs; else if (GRAPHICS_VER(dev_priv) == 5) dev_priv->clock_gating_funcs = &ilk_clock_gating_funcs; else if (IS_G4X(dev_priv)) dev_priv->clock_gating_funcs = &g4x_clock_gating_funcs; else if (IS_I965GM(dev_priv)) dev_priv->clock_gating_funcs = &i965gm_clock_gating_funcs; else if (IS_I965G(dev_priv)) dev_priv->clock_gating_funcs = &i965g_clock_gating_funcs; else if (GRAPHICS_VER(dev_priv) == 3) dev_priv->clock_gating_funcs = &gen3_clock_gating_funcs; else if (IS_I85X(dev_priv) || IS_I865G(dev_priv)) dev_priv->clock_gating_funcs = &i85x_clock_gating_funcs; else if (GRAPHICS_VER(dev_priv) == 2) dev_priv->clock_gating_funcs = &i830_clock_gating_funcs; else { MISSING_CASE(INTEL_DEVID(dev_priv)); dev_priv->clock_gating_funcs = &nop_clock_gating_funcs; } } static const struct drm_i915_wm_disp_funcs skl_wm_funcs = { .compute_global_watermarks = skl_compute_wm, }; static const struct drm_i915_wm_disp_funcs ilk_wm_funcs = { .compute_pipe_wm = ilk_compute_pipe_wm, .compute_intermediate_wm = ilk_compute_intermediate_wm, .initial_watermarks = ilk_initial_watermarks, .optimize_watermarks = ilk_optimize_watermarks, }; static const struct drm_i915_wm_disp_funcs vlv_wm_funcs = { .compute_pipe_wm = vlv_compute_pipe_wm, .compute_intermediate_wm = vlv_compute_intermediate_wm, .initial_watermarks = vlv_initial_watermarks, .optimize_watermarks = vlv_optimize_watermarks, .atomic_update_watermarks = vlv_atomic_update_fifo, }; static const struct drm_i915_wm_disp_funcs g4x_wm_funcs = { .compute_pipe_wm = g4x_compute_pipe_wm, .compute_intermediate_wm = g4x_compute_intermediate_wm, .initial_watermarks = g4x_initial_watermarks, .optimize_watermarks = g4x_optimize_watermarks, }; static const struct drm_i915_wm_disp_funcs pnv_wm_funcs = { .update_wm = pnv_update_wm, }; static const struct drm_i915_wm_disp_funcs i965_wm_funcs = { .update_wm = i965_update_wm, }; static const struct drm_i915_wm_disp_funcs i9xx_wm_funcs = { .update_wm = i9xx_update_wm, }; static const struct drm_i915_wm_disp_funcs i845_wm_funcs = { .update_wm = i845_update_wm, }; static const struct drm_i915_wm_disp_funcs nop_funcs = { }; /* Set up chip specific power management-related functions */ void intel_init_pm(struct drm_i915_private *dev_priv) { /* For cxsr */ if (IS_PINEVIEW(dev_priv)) pnv_get_mem_freq(dev_priv); else if (GRAPHICS_VER(dev_priv) == 5) ilk_get_mem_freq(dev_priv); intel_sagv_init(dev_priv); /* For FIFO watermark updates */ if (DISPLAY_VER(dev_priv) >= 9) { skl_setup_wm_latency(dev_priv); dev_priv->wm_disp = &skl_wm_funcs; } else if (HAS_PCH_SPLIT(dev_priv)) { ilk_setup_wm_latency(dev_priv); if ((DISPLAY_VER(dev_priv) == 5 && dev_priv->wm.pri_latency[1] && dev_priv->wm.spr_latency[1] && dev_priv->wm.cur_latency[1]) || (DISPLAY_VER(dev_priv) != 5 && dev_priv->wm.pri_latency[0] && dev_priv->wm.spr_latency[0] && dev_priv->wm.cur_latency[0])) { dev_priv->wm_disp = &ilk_wm_funcs; } else { drm_dbg_kms(&dev_priv->drm, "Failed to read display plane latency. " "Disable CxSR\n"); dev_priv->wm_disp = &nop_funcs; } } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { vlv_setup_wm_latency(dev_priv); dev_priv->wm_disp = &vlv_wm_funcs; } else if (IS_G4X(dev_priv)) { g4x_setup_wm_latency(dev_priv); dev_priv->wm_disp = &g4x_wm_funcs; } else if (IS_PINEVIEW(dev_priv)) { if (!intel_get_cxsr_latency(!IS_MOBILE(dev_priv), dev_priv->is_ddr3, dev_priv->fsb_freq, dev_priv->mem_freq)) { drm_info(&dev_priv->drm, "failed to find known CxSR latency " "(found ddr%s fsb freq %d, mem freq %d), " "disabling CxSR\n", (dev_priv->is_ddr3 == 1) ? "3" : "2", dev_priv->fsb_freq, dev_priv->mem_freq); /* Disable CxSR and never update its watermark again */ intel_set_memory_cxsr(dev_priv, false); dev_priv->wm_disp = &nop_funcs; } else dev_priv->wm_disp = &pnv_wm_funcs; } else if (DISPLAY_VER(dev_priv) == 4) { dev_priv->wm_disp = &i965_wm_funcs; } else if (DISPLAY_VER(dev_priv) == 3) { dev_priv->wm_disp = &i9xx_wm_funcs; } else if (DISPLAY_VER(dev_priv) == 2) { if (INTEL_NUM_PIPES(dev_priv) == 1) dev_priv->wm_disp = &i845_wm_funcs; else dev_priv->wm_disp = &i9xx_wm_funcs; } else { drm_err(&dev_priv->drm, "unexpected fall-through in %s\n", __func__); dev_priv->wm_disp = &nop_funcs; } } void intel_pm_setup(struct drm_i915_private *dev_priv) { dev_priv->runtime_pm.suspended = false; atomic_set(&dev_priv->runtime_pm.wakeref_count, 0); } static struct intel_global_state *intel_dbuf_duplicate_state(struct intel_global_obj *obj) { struct intel_dbuf_state *dbuf_state; dbuf_state = kmemdup(obj->state, sizeof(*dbuf_state), GFP_KERNEL); if (!dbuf_state) return NULL; return &dbuf_state->base; } static void intel_dbuf_destroy_state(struct intel_global_obj *obj, struct intel_global_state *state) { kfree(state); } static const struct intel_global_state_funcs intel_dbuf_funcs = { .atomic_duplicate_state = intel_dbuf_duplicate_state, .atomic_destroy_state = intel_dbuf_destroy_state, }; struct intel_dbuf_state * intel_atomic_get_dbuf_state(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); struct intel_global_state *dbuf_state; dbuf_state = intel_atomic_get_global_obj_state(state, &dev_priv->dbuf.obj); if (IS_ERR(dbuf_state)) return ERR_CAST(dbuf_state); return to_intel_dbuf_state(dbuf_state); } int intel_dbuf_init(struct drm_i915_private *dev_priv) { struct intel_dbuf_state *dbuf_state; dbuf_state = kzalloc(sizeof(*dbuf_state), GFP_KERNEL); if (!dbuf_state) return -ENOMEM; intel_atomic_global_obj_init(dev_priv, &dev_priv->dbuf.obj, &dbuf_state->base, &intel_dbuf_funcs); return 0; } /* * Configure MBUS_CTL and all DBUF_CTL_S of each slice to join_mbus state before * update the request state of all DBUS slices. */ static void update_mbus_pre_enable(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); u32 mbus_ctl, dbuf_min_tracker_val; enum dbuf_slice slice; const struct intel_dbuf_state *dbuf_state = intel_atomic_get_new_dbuf_state(state); if (!HAS_MBUS_JOINING(dev_priv)) return; /* * TODO: Implement vblank synchronized MBUS joining changes. * Must be properly coordinated with dbuf reprogramming. */ if (dbuf_state->joined_mbus) { mbus_ctl = MBUS_HASHING_MODE_1x4 | MBUS_JOIN | MBUS_JOIN_PIPE_SELECT_NONE; dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(3); } else { mbus_ctl = MBUS_HASHING_MODE_2x2 | MBUS_JOIN_PIPE_SELECT_NONE; dbuf_min_tracker_val = DBUF_MIN_TRACKER_STATE_SERVICE(1); } intel_de_rmw(dev_priv, MBUS_CTL, MBUS_HASHING_MODE_MASK | MBUS_JOIN | MBUS_JOIN_PIPE_SELECT_MASK, mbus_ctl); for_each_dbuf_slice(dev_priv, slice) intel_de_rmw(dev_priv, DBUF_CTL_S(slice), DBUF_MIN_TRACKER_STATE_SERVICE_MASK, dbuf_min_tracker_val); } void intel_dbuf_pre_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); const struct intel_dbuf_state *new_dbuf_state = intel_atomic_get_new_dbuf_state(state); const struct intel_dbuf_state *old_dbuf_state = intel_atomic_get_old_dbuf_state(state); if (!new_dbuf_state || ((new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices) && (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus))) return; WARN_ON(!new_dbuf_state->base.changed); update_mbus_pre_enable(state); gen9_dbuf_slices_update(dev_priv, old_dbuf_state->enabled_slices | new_dbuf_state->enabled_slices); } void intel_dbuf_post_plane_update(struct intel_atomic_state *state) { struct drm_i915_private *dev_priv = to_i915(state->base.dev); const struct intel_dbuf_state *new_dbuf_state = intel_atomic_get_new_dbuf_state(state); const struct intel_dbuf_state *old_dbuf_state = intel_atomic_get_old_dbuf_state(state); if (!new_dbuf_state || ((new_dbuf_state->enabled_slices == old_dbuf_state->enabled_slices) && (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus))) return; WARN_ON(!new_dbuf_state->base.changed); gen9_dbuf_slices_update(dev_priv, new_dbuf_state->enabled_slices); } void intel_mbus_dbox_update(struct intel_atomic_state *state) { struct drm_i915_private *i915 = to_i915(state->base.dev); const struct intel_dbuf_state *new_dbuf_state, *old_dbuf_state; const struct intel_crtc_state *new_crtc_state; const struct intel_crtc *crtc; u32 val = 0; int i; if (DISPLAY_VER(i915) < 11) return; new_dbuf_state = intel_atomic_get_new_dbuf_state(state); old_dbuf_state = intel_atomic_get_old_dbuf_state(state); if (!new_dbuf_state || (new_dbuf_state->joined_mbus == old_dbuf_state->joined_mbus && new_dbuf_state->active_pipes == old_dbuf_state->active_pipes)) return; if (DISPLAY_VER(i915) >= 12) { val |= MBUS_DBOX_B2B_TRANSACTIONS_MAX(16); val |= MBUS_DBOX_B2B_TRANSACTIONS_DELAY(1); val |= MBUS_DBOX_REGULATE_B2B_TRANSACTIONS_EN; } /* Wa_22010947358:adl-p */ if (IS_ALDERLAKE_P(i915)) val |= new_dbuf_state->joined_mbus ? MBUS_DBOX_A_CREDIT(6) : MBUS_DBOX_A_CREDIT(4); else val |= MBUS_DBOX_A_CREDIT(2); if (IS_ALDERLAKE_P(i915)) { val |= MBUS_DBOX_BW_CREDIT(2); val |= MBUS_DBOX_B_CREDIT(8); } else if (DISPLAY_VER(i915) >= 12) { val |= MBUS_DBOX_BW_CREDIT(2); val |= MBUS_DBOX_B_CREDIT(12); } else { val |= MBUS_DBOX_BW_CREDIT(1); val |= MBUS_DBOX_B_CREDIT(8); } for_each_new_intel_crtc_in_state(state, crtc, new_crtc_state, i) { if (!new_crtc_state->hw.active || !intel_crtc_needs_modeset(new_crtc_state)) continue; intel_de_write(i915, PIPE_MBUS_DBOX_CTL(crtc->pipe), val); } }
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