| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Jani Nikula | 4206 | 36.90% | 57 | 30.81% |
| Stephen Chandler Paul | 984 | 8.63% | 5 | 2.70% |
| Ville Syrjälä | 942 | 8.26% | 29 | 15.68% |
| Maarten Lankhorst | 780 | 6.84% | 7 | 3.78% |
| Jesse Barnes | 720 | 6.32% | 6 | 3.24% |
| Daniel Vetter | 503 | 4.41% | 9 | 4.86% |
| Chris Wilson | 434 | 3.81% | 14 | 7.57% |
| Rodrigo Vivi | 432 | 3.79% | 1 | 0.54% |
| Dave Airlie | 334 | 2.93% | 1 | 0.54% |
| Vandana Kannan | 315 | 2.76% | 3 | 1.62% |
| A.Sunil Kamath | 270 | 2.37% | 1 | 0.54% |
| Shobhit Kumar | 266 | 2.33% | 1 | 0.54% |
| Arnd Bergmann | 262 | 2.30% | 2 | 1.08% |
| Hans de Goede | 251 | 2.20% | 6 | 3.24% |
| Wambui Karuga | 155 | 1.36% | 1 | 0.54% |
| Matthew Garrett | 103 | 0.90% | 1 | 0.54% |
| Shawn C Lee | 94 | 0.82% | 3 | 1.62% |
| Takashi Iwai | 76 | 0.67% | 3 | 1.62% |
| Pankaj Bharadiya | 49 | 0.43% | 1 | 0.54% |
| Carsten Emde | 40 | 0.35% | 2 | 1.08% |
| Paulo Zanoni | 30 | 0.26% | 2 | 1.08% |
| Adam Jackson | 18 | 0.16% | 1 | 0.54% |
| Scot Doyle | 18 | 0.16% | 1 | 0.54% |
| Tvrtko A. Ursulin | 12 | 0.11% | 2 | 1.08% |
| Lucas De Marchi | 12 | 0.11% | 1 | 0.54% |
| Matt Roper | 11 | 0.10% | 2 | 1.08% |
| Vidya Srinivas | 9 | 0.08% | 1 | 0.54% |
| Ander Conselvan de Oliveira | 8 | 0.07% | 2 | 1.08% |
| Mika Kahola | 8 | 0.07% | 2 | 1.08% |
| Rob Clark | 8 | 0.07% | 1 | 0.54% |
| Joe Perches | 7 | 0.06% | 1 | 0.54% |
| Imre Deak | 7 | 0.06% | 1 | 0.54% |
| Jeremiah Mahler | 6 | 0.05% | 1 | 0.54% |
| Shashank Sharma | 5 | 0.04% | 2 | 1.08% |
| Thomas Zimmermann | 4 | 0.04% | 1 | 0.54% |
| Javi Merino | 3 | 0.03% | 1 | 0.54% |
| Aaron Lu | 3 | 0.03% | 1 | 0.54% |
| Joonas Lahtinen | 2 | 0.02% | 1 | 0.54% |
| Gustavo A. R. Silva | 2 | 0.02% | 1 | 0.54% |
| Damien Lespiau | 2 | 0.02% | 1 | 0.54% |
| Keith Packard | 2 | 0.02% | 1 | 0.54% |
| Ben Widawsky | 2 | 0.02% | 1 | 0.54% |
| Anusha Srivatsa | 1 | 0.01% | 1 | 0.54% |
| Stéphane Marchesin | 1 | 0.01% | 1 | 0.54% |
| Daniele Ceraolo Spurio | 1 | 0.01% | 1 | 0.54% |
| Lukas Wunner | 1 | 0.01% | 1 | 0.54% |
| Total | 11399 | 185 |
/* * Copyright © 2006-2010 Intel Corporation * Copyright (c) 2006 Dave Airlie <airlied@linux.ie> * * 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: * Eric Anholt <eric@anholt.net> * Dave Airlie <airlied@linux.ie> * Jesse Barnes <jesse.barnes@intel.com> * Chris Wilson <chris@chris-wilson.co.uk> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/kernel.h> #include <linux/moduleparam.h> #include <linux/pwm.h> #include "intel_connector.h" #include "intel_de.h" #include "intel_display_types.h" #include "intel_dp_aux_backlight.h" #include "intel_dsi_dcs_backlight.h" #include "intel_panel.h" void intel_fixed_panel_mode(const struct drm_display_mode *fixed_mode, struct drm_display_mode *adjusted_mode) { drm_mode_copy(adjusted_mode, fixed_mode); drm_mode_set_crtcinfo(adjusted_mode, 0); } static bool is_downclock_mode(const struct drm_display_mode *downclock_mode, const struct drm_display_mode *fixed_mode) { return drm_mode_match(downclock_mode, fixed_mode, DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_FLAGS | DRM_MODE_MATCH_3D_FLAGS) && downclock_mode->clock < fixed_mode->clock; } struct drm_display_mode * intel_panel_edid_downclock_mode(struct intel_connector *connector, const struct drm_display_mode *fixed_mode) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); const struct drm_display_mode *scan, *best_mode = NULL; struct drm_display_mode *downclock_mode; int best_clock = fixed_mode->clock; list_for_each_entry(scan, &connector->base.probed_modes, head) { /* * If one mode has the same resolution with the fixed_panel * mode while they have the different refresh rate, it means * that the reduced downclock is found. In such * case we can set the different FPx0/1 to dynamically select * between low and high frequency. */ if (is_downclock_mode(scan, fixed_mode) && scan->clock < best_clock) { /* * The downclock is already found. But we * expect to find the lower downclock. */ best_clock = scan->clock; best_mode = scan; } } if (!best_mode) return NULL; downclock_mode = drm_mode_duplicate(&dev_priv->drm, best_mode); if (!downclock_mode) return NULL; drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] using downclock mode from EDID: ", connector->base.base.id, connector->base.name); drm_mode_debug_printmodeline(downclock_mode); return downclock_mode; } struct drm_display_mode * intel_panel_edid_fixed_mode(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); const struct drm_display_mode *scan; struct drm_display_mode *fixed_mode; if (list_empty(&connector->base.probed_modes)) return NULL; /* prefer fixed mode from EDID if available */ list_for_each_entry(scan, &connector->base.probed_modes, head) { if ((scan->type & DRM_MODE_TYPE_PREFERRED) == 0) continue; fixed_mode = drm_mode_duplicate(&dev_priv->drm, scan); if (!fixed_mode) return NULL; drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] using preferred mode from EDID: ", connector->base.base.id, connector->base.name); drm_mode_debug_printmodeline(fixed_mode); return fixed_mode; } scan = list_first_entry(&connector->base.probed_modes, typeof(*scan), head); fixed_mode = drm_mode_duplicate(&dev_priv->drm, scan); if (!fixed_mode) return NULL; fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] using first mode from EDID: ", connector->base.base.id, connector->base.name); drm_mode_debug_printmodeline(fixed_mode); return fixed_mode; } struct drm_display_mode * intel_panel_vbt_fixed_mode(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct drm_display_info *info = &connector->base.display_info; struct drm_display_mode *fixed_mode; if (!dev_priv->vbt.lfp_lvds_vbt_mode) return NULL; fixed_mode = drm_mode_duplicate(&dev_priv->drm, dev_priv->vbt.lfp_lvds_vbt_mode); if (!fixed_mode) return NULL; fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; drm_dbg_kms(&dev_priv->drm, "[CONNECTOR:%d:%s] using mode from VBT: ", connector->base.base.id, connector->base.name); drm_mode_debug_printmodeline(fixed_mode); info->width_mm = fixed_mode->width_mm; info->height_mm = fixed_mode->height_mm; return fixed_mode; } /* adjusted_mode has been preset to be the panel's fixed mode */ int intel_pch_panel_fitting(struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) { const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; int x, y, width, height; /* Native modes don't need fitting */ if (adjusted_mode->crtc_hdisplay == crtc_state->pipe_src_w && adjusted_mode->crtc_vdisplay == crtc_state->pipe_src_h && crtc_state->output_format != INTEL_OUTPUT_FORMAT_YCBCR420) return 0; switch (conn_state->scaling_mode) { case DRM_MODE_SCALE_CENTER: width = crtc_state->pipe_src_w; height = crtc_state->pipe_src_h; x = (adjusted_mode->crtc_hdisplay - width + 1)/2; y = (adjusted_mode->crtc_vdisplay - height + 1)/2; break; case DRM_MODE_SCALE_ASPECT: /* Scale but preserve the aspect ratio */ { u32 scaled_width = adjusted_mode->crtc_hdisplay * crtc_state->pipe_src_h; u32 scaled_height = crtc_state->pipe_src_w * adjusted_mode->crtc_vdisplay; if (scaled_width > scaled_height) { /* pillar */ width = scaled_height / crtc_state->pipe_src_h; if (width & 1) width++; x = (adjusted_mode->crtc_hdisplay - width + 1) / 2; y = 0; height = adjusted_mode->crtc_vdisplay; } else if (scaled_width < scaled_height) { /* letter */ height = scaled_width / crtc_state->pipe_src_w; if (height & 1) height++; y = (adjusted_mode->crtc_vdisplay - height + 1) / 2; x = 0; width = adjusted_mode->crtc_hdisplay; } else { x = y = 0; width = adjusted_mode->crtc_hdisplay; height = adjusted_mode->crtc_vdisplay; } } break; case DRM_MODE_SCALE_NONE: WARN_ON(adjusted_mode->crtc_hdisplay != crtc_state->pipe_src_w); WARN_ON(adjusted_mode->crtc_vdisplay != crtc_state->pipe_src_h); fallthrough; case DRM_MODE_SCALE_FULLSCREEN: x = y = 0; width = adjusted_mode->crtc_hdisplay; height = adjusted_mode->crtc_vdisplay; break; default: MISSING_CASE(conn_state->scaling_mode); return -EINVAL; } drm_rect_init(&crtc_state->pch_pfit.dst, x, y, width, height); crtc_state->pch_pfit.enabled = true; return 0; } static void centre_horizontally(struct drm_display_mode *adjusted_mode, int width) { u32 border, sync_pos, blank_width, sync_width; /* keep the hsync and hblank widths constant */ sync_width = adjusted_mode->crtc_hsync_end - adjusted_mode->crtc_hsync_start; blank_width = adjusted_mode->crtc_hblank_end - adjusted_mode->crtc_hblank_start; sync_pos = (blank_width - sync_width + 1) / 2; border = (adjusted_mode->crtc_hdisplay - width + 1) / 2; border += border & 1; /* make the border even */ adjusted_mode->crtc_hdisplay = width; adjusted_mode->crtc_hblank_start = width + border; adjusted_mode->crtc_hblank_end = adjusted_mode->crtc_hblank_start + blank_width; adjusted_mode->crtc_hsync_start = adjusted_mode->crtc_hblank_start + sync_pos; adjusted_mode->crtc_hsync_end = adjusted_mode->crtc_hsync_start + sync_width; } static void centre_vertically(struct drm_display_mode *adjusted_mode, int height) { u32 border, sync_pos, blank_width, sync_width; /* keep the vsync and vblank widths constant */ sync_width = adjusted_mode->crtc_vsync_end - adjusted_mode->crtc_vsync_start; blank_width = adjusted_mode->crtc_vblank_end - adjusted_mode->crtc_vblank_start; sync_pos = (blank_width - sync_width + 1) / 2; border = (adjusted_mode->crtc_vdisplay - height + 1) / 2; adjusted_mode->crtc_vdisplay = height; adjusted_mode->crtc_vblank_start = height + border; adjusted_mode->crtc_vblank_end = adjusted_mode->crtc_vblank_start + blank_width; adjusted_mode->crtc_vsync_start = adjusted_mode->crtc_vblank_start + sync_pos; adjusted_mode->crtc_vsync_end = adjusted_mode->crtc_vsync_start + sync_width; } static u32 panel_fitter_scaling(u32 source, u32 target) { /* * Floating point operation is not supported. So the FACTOR * is defined, which can avoid the floating point computation * when calculating the panel ratio. */ #define ACCURACY 12 #define FACTOR (1 << ACCURACY) u32 ratio = source * FACTOR / target; return (FACTOR * ratio + FACTOR/2) / FACTOR; } static void i965_scale_aspect(struct intel_crtc_state *crtc_state, u32 *pfit_control) { const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; u32 scaled_width = adjusted_mode->crtc_hdisplay * crtc_state->pipe_src_h; u32 scaled_height = crtc_state->pipe_src_w * adjusted_mode->crtc_vdisplay; /* 965+ is easy, it does everything in hw */ if (scaled_width > scaled_height) *pfit_control |= PFIT_ENABLE | PFIT_SCALING_PILLAR; else if (scaled_width < scaled_height) *pfit_control |= PFIT_ENABLE | PFIT_SCALING_LETTER; else if (adjusted_mode->crtc_hdisplay != crtc_state->pipe_src_w) *pfit_control |= PFIT_ENABLE | PFIT_SCALING_AUTO; } static void i9xx_scale_aspect(struct intel_crtc_state *crtc_state, u32 *pfit_control, u32 *pfit_pgm_ratios, u32 *border) { struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; u32 scaled_width = adjusted_mode->crtc_hdisplay * crtc_state->pipe_src_h; u32 scaled_height = crtc_state->pipe_src_w * adjusted_mode->crtc_vdisplay; u32 bits; /* * For earlier chips we have to calculate the scaling * ratio by hand and program it into the * PFIT_PGM_RATIO register */ if (scaled_width > scaled_height) { /* pillar */ centre_horizontally(adjusted_mode, scaled_height / crtc_state->pipe_src_h); *border = LVDS_BORDER_ENABLE; if (crtc_state->pipe_src_h != adjusted_mode->crtc_vdisplay) { bits = panel_fitter_scaling(crtc_state->pipe_src_h, adjusted_mode->crtc_vdisplay); *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | bits << PFIT_VERT_SCALE_SHIFT); *pfit_control |= (PFIT_ENABLE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); } } else if (scaled_width < scaled_height) { /* letter */ centre_vertically(adjusted_mode, scaled_width / crtc_state->pipe_src_w); *border = LVDS_BORDER_ENABLE; if (crtc_state->pipe_src_w != adjusted_mode->crtc_hdisplay) { bits = panel_fitter_scaling(crtc_state->pipe_src_w, adjusted_mode->crtc_hdisplay); *pfit_pgm_ratios |= (bits << PFIT_HORIZ_SCALE_SHIFT | bits << PFIT_VERT_SCALE_SHIFT); *pfit_control |= (PFIT_ENABLE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); } } else { /* Aspects match, Let hw scale both directions */ *pfit_control |= (PFIT_ENABLE | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); } } int intel_gmch_panel_fitting(struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) { struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); u32 pfit_control = 0, pfit_pgm_ratios = 0, border = 0; struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; /* Native modes don't need fitting */ if (adjusted_mode->crtc_hdisplay == crtc_state->pipe_src_w && adjusted_mode->crtc_vdisplay == crtc_state->pipe_src_h) goto out; switch (conn_state->scaling_mode) { case DRM_MODE_SCALE_CENTER: /* * For centered modes, we have to calculate border widths & * heights and modify the values programmed into the CRTC. */ centre_horizontally(adjusted_mode, crtc_state->pipe_src_w); centre_vertically(adjusted_mode, crtc_state->pipe_src_h); border = LVDS_BORDER_ENABLE; break; case DRM_MODE_SCALE_ASPECT: /* Scale but preserve the aspect ratio */ if (DISPLAY_VER(dev_priv) >= 4) i965_scale_aspect(crtc_state, &pfit_control); else i9xx_scale_aspect(crtc_state, &pfit_control, &pfit_pgm_ratios, &border); break; case DRM_MODE_SCALE_FULLSCREEN: /* * Full scaling, even if it changes the aspect ratio. * Fortunately this is all done for us in hw. */ if (crtc_state->pipe_src_h != adjusted_mode->crtc_vdisplay || crtc_state->pipe_src_w != adjusted_mode->crtc_hdisplay) { pfit_control |= PFIT_ENABLE; if (DISPLAY_VER(dev_priv) >= 4) pfit_control |= PFIT_SCALING_AUTO; else pfit_control |= (VERT_AUTO_SCALE | VERT_INTERP_BILINEAR | HORIZ_AUTO_SCALE | HORIZ_INTERP_BILINEAR); } break; default: MISSING_CASE(conn_state->scaling_mode); return -EINVAL; } /* 965+ wants fuzzy fitting */ /* FIXME: handle multiple panels by failing gracefully */ if (DISPLAY_VER(dev_priv) >= 4) pfit_control |= PFIT_PIPE(crtc->pipe) | PFIT_FILTER_FUZZY; out: if ((pfit_control & PFIT_ENABLE) == 0) { pfit_control = 0; pfit_pgm_ratios = 0; } /* Make sure pre-965 set dither correctly for 18bpp panels. */ if (DISPLAY_VER(dev_priv) < 4 && crtc_state->pipe_bpp == 18) pfit_control |= PANEL_8TO6_DITHER_ENABLE; crtc_state->gmch_pfit.control = pfit_control; crtc_state->gmch_pfit.pgm_ratios = pfit_pgm_ratios; crtc_state->gmch_pfit.lvds_border_bits = border; return 0; } /** * scale - scale values from one range to another * @source_val: value in range [@source_min..@source_max] * @source_min: minimum legal value for @source_val * @source_max: maximum legal value for @source_val * @target_min: corresponding target value for @source_min * @target_max: corresponding target value for @source_max * * Return @source_val in range [@source_min..@source_max] scaled to range * [@target_min..@target_max]. */ static u32 scale(u32 source_val, u32 source_min, u32 source_max, u32 target_min, u32 target_max) { u64 target_val; WARN_ON(source_min > source_max); WARN_ON(target_min > target_max); /* defensive */ source_val = clamp(source_val, source_min, source_max); /* avoid overflows */ target_val = mul_u32_u32(source_val - source_min, target_max - target_min); target_val = DIV_ROUND_CLOSEST_ULL(target_val, source_max - source_min); target_val += target_min; return target_val; } /* Scale user_level in range [0..user_max] to [0..hw_max], clamping the result * to [hw_min..hw_max]. */ static u32 clamp_user_to_hw(struct intel_connector *connector, u32 user_level, u32 user_max) { struct intel_panel *panel = &connector->panel; u32 hw_level; hw_level = scale(user_level, 0, user_max, 0, panel->backlight.max); hw_level = clamp(hw_level, panel->backlight.min, panel->backlight.max); return hw_level; } /* Scale hw_level in range [hw_min..hw_max] to [0..user_max]. */ static u32 scale_hw_to_user(struct intel_connector *connector, u32 hw_level, u32 user_max) { struct intel_panel *panel = &connector->panel; return scale(hw_level, panel->backlight.min, panel->backlight.max, 0, user_max); } u32 intel_panel_invert_pwm_level(struct intel_connector *connector, u32 val) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); if (dev_priv->params.invert_brightness < 0) return val; if (dev_priv->params.invert_brightness > 0 || dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS) { return panel->backlight.pwm_level_max - val + panel->backlight.pwm_level_min; } return val; } void intel_panel_set_pwm_level(const struct drm_connector_state *conn_state, u32 val) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; drm_dbg_kms(&i915->drm, "set backlight PWM = %d\n", val); panel->backlight.pwm_funcs->set(conn_state, val); } u32 intel_panel_backlight_level_to_pwm(struct intel_connector *connector, u32 val) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; drm_WARN_ON_ONCE(&dev_priv->drm, panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); val = scale(val, panel->backlight.min, panel->backlight.max, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); return intel_panel_invert_pwm_level(connector, val); } u32 intel_panel_backlight_level_from_pwm(struct intel_connector *connector, u32 val) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; drm_WARN_ON_ONCE(&dev_priv->drm, panel->backlight.max == 0 || panel->backlight.pwm_level_max == 0); if (dev_priv->params.invert_brightness > 0 || (dev_priv->params.invert_brightness == 0 && dev_priv->quirks & QUIRK_INVERT_BRIGHTNESS)) val = panel->backlight.pwm_level_max - (val - panel->backlight.pwm_level_min); return scale(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max, panel->backlight.min, panel->backlight.max); } static u32 lpt_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); return intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & BACKLIGHT_DUTY_CYCLE_MASK; } static u32 pch_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); return intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; } static u32 i9xx_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 val; val = intel_de_read(dev_priv, BLC_PWM_CTL) & BACKLIGHT_DUTY_CYCLE_MASK; if (DISPLAY_VER(dev_priv) < 4) val >>= 1; if (panel->backlight.combination_mode) { u8 lbpc; pci_read_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, &lbpc); val *= lbpc; } return val; } static u32 vlv_get_backlight(struct intel_connector *connector, enum pipe pipe) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) return 0; return intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & BACKLIGHT_DUTY_CYCLE_MASK; } static u32 bxt_get_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; return intel_de_read(dev_priv, BXT_BLC_PWM_DUTY(panel->backlight.controller)); } static u32 ext_pwm_get_backlight(struct intel_connector *connector, enum pipe unused) { struct intel_panel *panel = &connector->panel; struct pwm_state state; pwm_get_state(panel->backlight.pwm, &state); return pwm_get_relative_duty_cycle(&state, 100); } static void lpt_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); u32 val = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2) & ~BACKLIGHT_DUTY_CYCLE_MASK; intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, val | level); } static void pch_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); u32 tmp; tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; intel_de_write(dev_priv, BLC_PWM_CPU_CTL, tmp | level); } static void i9xx_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 tmp, mask; drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); if (panel->backlight.combination_mode) { u8 lbpc; lbpc = level * 0xfe / panel->backlight.pwm_level_max + 1; level /= lbpc; pci_write_config_byte(to_pci_dev(dev_priv->drm.dev), LBPC, lbpc); } if (DISPLAY_VER(dev_priv) == 4) { mask = BACKLIGHT_DUTY_CYCLE_MASK; } else { level <<= 1; mask = BACKLIGHT_DUTY_CYCLE_MASK_PNV; } tmp = intel_de_read(dev_priv, BLC_PWM_CTL) & ~mask; intel_de_write(dev_priv, BLC_PWM_CTL, tmp | level); } static void vlv_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; u32 tmp; tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)) & ~BACKLIGHT_DUTY_CYCLE_MASK; intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), tmp | level); } static void bxt_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; intel_de_write(dev_priv, BXT_BLC_PWM_DUTY(panel->backlight.controller), level); } static void ext_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_panel *panel = &to_intel_connector(conn_state->connector)->panel; pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); } static void intel_panel_actually_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; drm_dbg_kms(&i915->drm, "set backlight level = %d\n", level); panel->backlight.funcs->set(conn_state, level); } /* set backlight brightness to level in range [0..max], assuming hw min is * respected. */ void intel_panel_set_backlight_acpi(const struct drm_connector_state *conn_state, u32 user_level, u32 user_max) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 hw_level; /* * Lack of crtc may occur during driver init because * connection_mutex isn't held across the entire backlight * setup + modeset readout, and the BIOS can issue the * requests at any time. */ if (!panel->backlight.present || !conn_state->crtc) return; mutex_lock(&dev_priv->backlight_lock); drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); hw_level = clamp_user_to_hw(connector, user_level, user_max); panel->backlight.level = hw_level; if (panel->backlight.device) panel->backlight.device->props.brightness = scale_hw_to_user(connector, panel->backlight.level, panel->backlight.device->props.max_brightness); if (panel->backlight.enabled) intel_panel_actually_set_backlight(conn_state, hw_level); mutex_unlock(&dev_priv->backlight_lock); } static void lpt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); u32 tmp; intel_panel_set_pwm_level(old_conn_state, level); /* * Although we don't support or enable CPU PWM with LPT/SPT based * systems, it may have been enabled prior to loading the * driver. Disable to avoid warnings on LCPLL disable. * * This needs rework if we need to add support for CPU PWM on PCH split * platforms. */ tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); if (tmp & BLM_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "cpu backlight was enabled, disabling\n"); intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); } tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); } static void pch_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); u32 tmp; intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, tmp & ~BLM_PWM_ENABLE); tmp = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, tmp & ~BLM_PCH_PWM_ENABLE); } static void i9xx_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { intel_panel_set_pwm_level(old_conn_state, val); } static void i965_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { struct drm_i915_private *dev_priv = to_i915(old_conn_state->connector->dev); u32 tmp; intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BLC_PWM_CTL2); intel_de_write(dev_priv, BLC_PWM_CTL2, tmp & ~BLM_PWM_ENABLE); } static void vlv_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); enum pipe pipe = to_intel_crtc(old_conn_state->crtc)->pipe; u32 tmp; intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), tmp & ~BLM_PWM_ENABLE); } static void bxt_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 tmp; intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), tmp & ~BXT_BLC_PWM_ENABLE); if (panel->backlight.controller == 1) { val = intel_de_read(dev_priv, UTIL_PIN_CTL); val &= ~UTIL_PIN_ENABLE; intel_de_write(dev_priv, UTIL_PIN_CTL, val); } } static void cnp_disable_backlight(const struct drm_connector_state *old_conn_state, u32 val) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 tmp; intel_panel_set_pwm_level(old_conn_state, val); tmp = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), tmp & ~BXT_BLC_PWM_ENABLE); } static void ext_pwm_disable_backlight(const struct drm_connector_state *old_conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct intel_panel *panel = &connector->panel; panel->backlight.pwm_state.enabled = false; pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); } void intel_panel_disable_backlight(const struct drm_connector_state *old_conn_state) { struct intel_connector *connector = to_intel_connector(old_conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; if (!panel->backlight.present) return; /* * Do not disable backlight on the vga_switcheroo path. When switching * away from i915, the other client may depend on i915 to handle the * backlight. This will leave the backlight on unnecessarily when * another client is not activated. */ if (dev_priv->drm.switch_power_state == DRM_SWITCH_POWER_CHANGING) { drm_dbg_kms(&dev_priv->drm, "Skipping backlight disable on vga switch\n"); return; } mutex_lock(&dev_priv->backlight_lock); if (panel->backlight.device) panel->backlight.device->props.power = FB_BLANK_POWERDOWN; panel->backlight.enabled = false; panel->backlight.funcs->disable(old_conn_state, 0); mutex_unlock(&dev_priv->backlight_lock); } static void lpt_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 pch_ctl1, pch_ctl2, schicken; pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); } if (HAS_PCH_LPT(dev_priv)) { schicken = intel_de_read(dev_priv, SOUTH_CHICKEN2); if (panel->backlight.alternate_pwm_increment) schicken |= LPT_PWM_GRANULARITY; else schicken &= ~LPT_PWM_GRANULARITY; intel_de_write(dev_priv, SOUTH_CHICKEN2, schicken); } else { schicken = intel_de_read(dev_priv, SOUTH_CHICKEN1); if (panel->backlight.alternate_pwm_increment) schicken |= SPT_PWM_GRANULARITY; else schicken &= ~SPT_PWM_GRANULARITY; intel_de_write(dev_priv, SOUTH_CHICKEN1, schicken); } pch_ctl2 = panel->backlight.pwm_level_max << 16; intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); pch_ctl1 = 0; if (panel->backlight.active_low_pwm) pch_ctl1 |= BLM_PCH_POLARITY; /* After LPT, override is the default. */ if (HAS_PCH_LPT(dev_priv)) pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE; intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); /* This won't stick until the above enable. */ intel_panel_set_pwm_level(conn_state, level); } static void pch_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; enum transcoder cpu_transcoder = crtc_state->cpu_transcoder; u32 cpu_ctl2, pch_ctl1, pch_ctl2; cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); if (cpu_ctl2 & BLM_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "cpu backlight already enabled\n"); cpu_ctl2 &= ~BLM_PWM_ENABLE; intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); } pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); if (pch_ctl1 & BLM_PCH_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "pch backlight already enabled\n"); pch_ctl1 &= ~BLM_PCH_PWM_ENABLE; intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); } if (cpu_transcoder == TRANSCODER_EDP) cpu_ctl2 = BLM_TRANSCODER_EDP; else cpu_ctl2 = BLM_PIPE(cpu_transcoder); intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2); intel_de_posting_read(dev_priv, BLC_PWM_CPU_CTL2); intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2 | BLM_PWM_ENABLE); /* This won't stick until the above enable. */ intel_panel_set_pwm_level(conn_state, level); pch_ctl2 = panel->backlight.pwm_level_max << 16; intel_de_write(dev_priv, BLC_PWM_PCH_CTL2, pch_ctl2); pch_ctl1 = 0; if (panel->backlight.active_low_pwm) pch_ctl1 |= BLM_PCH_POLARITY; intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1); intel_de_posting_read(dev_priv, BLC_PWM_PCH_CTL1); intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_PWM_ENABLE); } static void i9xx_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 ctl, freq; ctl = intel_de_read(dev_priv, BLC_PWM_CTL); if (ctl & BACKLIGHT_DUTY_CYCLE_MASK_PNV) { drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); intel_de_write(dev_priv, BLC_PWM_CTL, 0); } freq = panel->backlight.pwm_level_max; if (panel->backlight.combination_mode) freq /= 0xff; ctl = freq << 17; if (panel->backlight.combination_mode) ctl |= BLM_LEGACY_MODE; if (IS_PINEVIEW(dev_priv) && panel->backlight.active_low_pwm) ctl |= BLM_POLARITY_PNV; intel_de_write(dev_priv, BLC_PWM_CTL, ctl); intel_de_posting_read(dev_priv, BLC_PWM_CTL); /* XXX: combine this into above write? */ intel_panel_set_pwm_level(conn_state, level); /* * Needed to enable backlight on some 855gm models. BLC_HIST_CTL is * 855gm only, but checking for gen2 is safe, as 855gm is the only gen2 * that has backlight. */ if (DISPLAY_VER(dev_priv) == 2) intel_de_write(dev_priv, BLC_HIST_CTL, BLM_HISTOGRAM_ENABLE); } static void i965_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; enum pipe pipe = to_intel_crtc(conn_state->crtc)->pipe; u32 ctl, ctl2, freq; ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); if (ctl2 & BLM_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); ctl2 &= ~BLM_PWM_ENABLE; intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); } freq = panel->backlight.pwm_level_max; if (panel->backlight.combination_mode) freq /= 0xff; ctl = freq << 16; intel_de_write(dev_priv, BLC_PWM_CTL, ctl); ctl2 = BLM_PIPE(pipe); if (panel->backlight.combination_mode) ctl2 |= BLM_COMBINATION_MODE; if (panel->backlight.active_low_pwm) ctl2 |= BLM_POLARITY_I965; intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2); intel_de_posting_read(dev_priv, BLC_PWM_CTL2); intel_de_write(dev_priv, BLC_PWM_CTL2, ctl2 | BLM_PWM_ENABLE); intel_panel_set_pwm_level(conn_state, level); } static void vlv_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; u32 ctl, ctl2; ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); if (ctl2 & BLM_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); ctl2 &= ~BLM_PWM_ENABLE; intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); } ctl = panel->backlight.pwm_level_max << 16; intel_de_write(dev_priv, VLV_BLC_PWM_CTL(pipe), ctl); /* XXX: combine this into above write? */ intel_panel_set_pwm_level(conn_state, level); ctl2 = 0; if (panel->backlight.active_low_pwm) ctl2 |= BLM_POLARITY_I965; intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2); intel_de_posting_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); intel_de_write(dev_priv, VLV_BLC_PWM_CTL2(pipe), ctl2 | BLM_PWM_ENABLE); } static void bxt_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; u32 pwm_ctl, val; /* Controller 1 uses the utility pin. */ if (panel->backlight.controller == 1) { val = intel_de_read(dev_priv, UTIL_PIN_CTL); if (val & UTIL_PIN_ENABLE) { drm_dbg_kms(&dev_priv->drm, "util pin already enabled\n"); val &= ~UTIL_PIN_ENABLE; intel_de_write(dev_priv, UTIL_PIN_CTL, val); } val = 0; if (panel->backlight.util_pin_active_low) val |= UTIL_PIN_POLARITY; intel_de_write(dev_priv, UTIL_PIN_CTL, val | UTIL_PIN_PIPE(pipe) | UTIL_PIN_MODE_PWM | UTIL_PIN_ENABLE); } pwm_ctl = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); if (pwm_ctl & BXT_BLC_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); pwm_ctl &= ~BXT_BLC_PWM_ENABLE; intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); } intel_de_write(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller), panel->backlight.pwm_level_max); intel_panel_set_pwm_level(conn_state, level); pwm_ctl = 0; if (panel->backlight.active_low_pwm) pwm_ctl |= BXT_BLC_PWM_POLARITY; intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); intel_de_posting_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl | BXT_BLC_PWM_ENABLE); } static void cnp_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 pwm_ctl; pwm_ctl = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); if (pwm_ctl & BXT_BLC_PWM_ENABLE) { drm_dbg_kms(&dev_priv->drm, "backlight already enabled\n"); pwm_ctl &= ~BXT_BLC_PWM_ENABLE; intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); } intel_de_write(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller), panel->backlight.pwm_level_max); intel_panel_set_pwm_level(conn_state, level); pwm_ctl = 0; if (panel->backlight.active_low_pwm) pwm_ctl |= BXT_BLC_PWM_POLARITY; intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl); intel_de_posting_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); intel_de_write(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller), pwm_ctl | BXT_BLC_PWM_ENABLE); } static void ext_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; pwm_set_relative_duty_cycle(&panel->backlight.pwm_state, level, 100); panel->backlight.pwm_state.enabled = true; pwm_apply_state(panel->backlight.pwm, &panel->backlight.pwm_state); } static void __intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; WARN_ON(panel->backlight.max == 0); if (panel->backlight.level <= panel->backlight.min) { panel->backlight.level = panel->backlight.max; if (panel->backlight.device) panel->backlight.device->props.brightness = scale_hw_to_user(connector, panel->backlight.level, panel->backlight.device->props.max_brightness); } panel->backlight.funcs->enable(crtc_state, conn_state, panel->backlight.level); panel->backlight.enabled = true; if (panel->backlight.device) panel->backlight.device->props.power = FB_BLANK_UNBLANK; } void intel_panel_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; enum pipe pipe = to_intel_crtc(crtc_state->uapi.crtc)->pipe; if (!panel->backlight.present) return; drm_dbg_kms(&dev_priv->drm, "pipe %c\n", pipe_name(pipe)); mutex_lock(&dev_priv->backlight_lock); __intel_panel_enable_backlight(crtc_state, conn_state); mutex_unlock(&dev_priv->backlight_lock); } #if IS_ENABLED(CONFIG_BACKLIGHT_CLASS_DEVICE) static u32 intel_panel_get_backlight(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 val = 0; mutex_lock(&dev_priv->backlight_lock); if (panel->backlight.enabled) val = panel->backlight.funcs->get(connector, intel_connector_get_pipe(connector)); mutex_unlock(&dev_priv->backlight_lock); drm_dbg_kms(&dev_priv->drm, "get backlight PWM = %d\n", val); return val; } /* Scale user_level in range [0..user_max] to [hw_min..hw_max]. */ static u32 scale_user_to_hw(struct intel_connector *connector, u32 user_level, u32 user_max) { struct intel_panel *panel = &connector->panel; return scale(user_level, 0, user_max, panel->backlight.min, panel->backlight.max); } /* set backlight brightness to level in range [0..max], scaling wrt hw min */ static void intel_panel_set_backlight(const struct drm_connector_state *conn_state, u32 user_level, u32 user_max) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 hw_level; if (!panel->backlight.present) return; mutex_lock(&dev_priv->backlight_lock); drm_WARN_ON(&dev_priv->drm, panel->backlight.max == 0); hw_level = scale_user_to_hw(connector, user_level, user_max); panel->backlight.level = hw_level; if (panel->backlight.enabled) intel_panel_actually_set_backlight(conn_state, hw_level); mutex_unlock(&dev_priv->backlight_lock); } static int intel_backlight_device_update_status(struct backlight_device *bd) { struct intel_connector *connector = bl_get_data(bd); struct intel_panel *panel = &connector->panel; struct drm_device *dev = connector->base.dev; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); DRM_DEBUG_KMS("updating intel_backlight, brightness=%d/%d\n", bd->props.brightness, bd->props.max_brightness); intel_panel_set_backlight(connector->base.state, bd->props.brightness, bd->props.max_brightness); /* * Allow flipping bl_power as a sub-state of enabled. Sadly the * backlight class device does not make it easy to to differentiate * between callbacks for brightness and bl_power, so our backlight_power * callback needs to take this into account. */ if (panel->backlight.enabled) { if (panel->backlight.power) { bool enable = bd->props.power == FB_BLANK_UNBLANK && bd->props.brightness != 0; panel->backlight.power(connector, enable); } } else { bd->props.power = FB_BLANK_POWERDOWN; } drm_modeset_unlock(&dev->mode_config.connection_mutex); return 0; } static int intel_backlight_device_get_brightness(struct backlight_device *bd) { struct intel_connector *connector = bl_get_data(bd); struct drm_device *dev = connector->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); intel_wakeref_t wakeref; int ret = 0; with_intel_runtime_pm(&dev_priv->runtime_pm, wakeref) { u32 hw_level; drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); hw_level = intel_panel_get_backlight(connector); ret = scale_hw_to_user(connector, hw_level, bd->props.max_brightness); drm_modeset_unlock(&dev->mode_config.connection_mutex); } return ret; } static const struct backlight_ops intel_backlight_device_ops = { .update_status = intel_backlight_device_update_status, .get_brightness = intel_backlight_device_get_brightness, }; int intel_backlight_device_register(struct intel_connector *connector) { struct drm_i915_private *i915 = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; struct backlight_properties props; struct backlight_device *bd; const char *name; int ret = 0; if (WARN_ON(panel->backlight.device)) return -ENODEV; if (!panel->backlight.present) return 0; WARN_ON(panel->backlight.max == 0); memset(&props, 0, sizeof(props)); props.type = BACKLIGHT_RAW; /* * Note: Everything should work even if the backlight device max * presented to the userspace is arbitrarily chosen. */ props.max_brightness = panel->backlight.max; props.brightness = scale_hw_to_user(connector, panel->backlight.level, props.max_brightness); if (panel->backlight.enabled) props.power = FB_BLANK_UNBLANK; else props.power = FB_BLANK_POWERDOWN; name = kstrdup("intel_backlight", GFP_KERNEL); if (!name) return -ENOMEM; bd = backlight_device_register(name, connector->base.kdev, connector, &intel_backlight_device_ops, &props); /* * Using the same name independent of the drm device or connector * prevents registration of multiple backlight devices in the * driver. However, we need to use the default name for backward * compatibility. Use unique names for subsequent backlight devices as a * fallback when the default name already exists. */ if (IS_ERR(bd) && PTR_ERR(bd) == -EEXIST) { kfree(name); name = kasprintf(GFP_KERNEL, "card%d-%s-backlight", i915->drm.primary->index, connector->base.name); if (!name) return -ENOMEM; bd = backlight_device_register(name, connector->base.kdev, connector, &intel_backlight_device_ops, &props); } if (IS_ERR(bd)) { drm_err(&i915->drm, "[CONNECTOR:%d:%s] backlight device %s register failed: %ld\n", connector->base.base.id, connector->base.name, name, PTR_ERR(bd)); ret = PTR_ERR(bd); goto out; } panel->backlight.device = bd; drm_dbg_kms(&i915->drm, "[CONNECTOR:%d:%s] backlight device %s registered\n", connector->base.base.id, connector->base.name, name); out: kfree(name); return ret; } void intel_backlight_device_unregister(struct intel_connector *connector) { struct intel_panel *panel = &connector->panel; if (panel->backlight.device) { backlight_device_unregister(panel->backlight.device); panel->backlight.device = NULL; } } #endif /* CONFIG_BACKLIGHT_CLASS_DEVICE */ /* * CNP: PWM clock frequency is 19.2 MHz or 24 MHz. * PWM increment = 1 */ static u32 cnp_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), pwm_freq_hz); } /* * BXT: PWM clock frequency = 19.2 MHz. */ static u32 bxt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { return DIV_ROUND_CLOSEST(KHz(19200), pwm_freq_hz); } /* * SPT: This value represents the period of the PWM stream in clock periods * multiplied by 16 (default increment) or 128 (alternate increment selected in * SCHICKEN_1 bit 0). PWM clock is 24 MHz. */ static u32 spt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct intel_panel *panel = &connector->panel; u32 mul; if (panel->backlight.alternate_pwm_increment) mul = 128; else mul = 16; return DIV_ROUND_CLOSEST(MHz(24), pwm_freq_hz * mul); } /* * LPT: This value represents the period of the PWM stream in clock periods * multiplied by 128 (default increment) or 16 (alternate increment, selected in * LPT SOUTH_CHICKEN2 register bit 5). */ static u32 lpt_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 mul, clock; if (panel->backlight.alternate_pwm_increment) mul = 16; else mul = 128; if (HAS_PCH_LPT_H(dev_priv)) clock = MHz(135); /* LPT:H */ else clock = MHz(24); /* LPT:LP */ return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); } /* * ILK/SNB/IVB: This value represents the period of the PWM stream in PCH * display raw clocks multiplied by 128. */ static u32 pch_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); return DIV_ROUND_CLOSEST(KHz(RUNTIME_INFO(dev_priv)->rawclk_freq), pwm_freq_hz * 128); } /* * Gen2: This field determines the number of time base events (display core * clock frequency/32) in total for a complete cycle of modulated backlight * control. * * Gen3: A time base event equals the display core clock ([DevPNV] HRAW clock) * divided by 32. */ static u32 i9xx_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); int clock; if (IS_PINEVIEW(dev_priv)) clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); else clock = KHz(dev_priv->cdclk.hw.cdclk); return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 32); } /* * Gen4: This value represents the period of the PWM stream in display core * clocks ([DevCTG] HRAW clocks) multiplied by 128. * */ static u32 i965_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); int clock; if (IS_G4X(dev_priv)) clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); else clock = KHz(dev_priv->cdclk.hw.cdclk); return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * 128); } /* * VLV: This value represents the period of the PWM stream in display core * clocks ([DevCTG] 200MHz HRAW clocks) multiplied by 128 or 25MHz S0IX clocks * multiplied by 16. CHV uses a 19.2MHz S0IX clock. */ static u32 vlv_hz_to_pwm(struct intel_connector *connector, u32 pwm_freq_hz) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); int mul, clock; if ((intel_de_read(dev_priv, CBR1_VLV) & CBR_PWM_CLOCK_MUX_SELECT) == 0) { if (IS_CHERRYVIEW(dev_priv)) clock = KHz(19200); else clock = MHz(25); mul = 16; } else { clock = KHz(RUNTIME_INFO(dev_priv)->rawclk_freq); mul = 128; } return DIV_ROUND_CLOSEST(clock, pwm_freq_hz * mul); } static u16 get_vbt_pwm_freq(struct drm_i915_private *dev_priv) { u16 pwm_freq_hz = dev_priv->vbt.backlight.pwm_freq_hz; if (pwm_freq_hz) { drm_dbg_kms(&dev_priv->drm, "VBT defined backlight frequency %u Hz\n", pwm_freq_hz); } else { pwm_freq_hz = 200; drm_dbg_kms(&dev_priv->drm, "default backlight frequency %u Hz\n", pwm_freq_hz); } return pwm_freq_hz; } static u32 get_backlight_max_vbt(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u16 pwm_freq_hz = get_vbt_pwm_freq(dev_priv); u32 pwm; if (!panel->backlight.pwm_funcs->hz_to_pwm) { drm_dbg_kms(&dev_priv->drm, "backlight frequency conversion not supported\n"); return 0; } pwm = panel->backlight.pwm_funcs->hz_to_pwm(connector, pwm_freq_hz); if (!pwm) { drm_dbg_kms(&dev_priv->drm, "backlight frequency conversion failed\n"); return 0; } return pwm; } /* * Note: The setup hooks can't assume pipe is set! */ static u32 get_backlight_min_vbt(struct intel_connector *connector) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; int min; drm_WARN_ON(&dev_priv->drm, panel->backlight.pwm_level_max == 0); /* * XXX: If the vbt value is 255, it makes min equal to max, which leads * to problems. There are such machines out there. Either our * interpretation is wrong or the vbt has bogus data. Or both. Safeguard * against this by letting the minimum be at most (arbitrarily chosen) * 25% of the max. */ min = clamp_t(int, dev_priv->vbt.backlight.min_brightness, 0, 64); if (min != dev_priv->vbt.backlight.min_brightness) { drm_dbg_kms(&dev_priv->drm, "clamping VBT min backlight %d/255 to %d/255\n", dev_priv->vbt.backlight.min_brightness, min); } /* vbt value is a coefficient in range [0..255] */ return scale(min, 0, 255, 0, panel->backlight.pwm_level_max); } static int lpt_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 cpu_ctl2, pch_ctl1, pch_ctl2, val; bool alt, cpu_mode; if (HAS_PCH_LPT(dev_priv)) alt = intel_de_read(dev_priv, SOUTH_CHICKEN2) & LPT_PWM_GRANULARITY; else alt = intel_de_read(dev_priv, SOUTH_CHICKEN1) & SPT_PWM_GRANULARITY; panel->backlight.alternate_pwm_increment = alt; pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); panel->backlight.pwm_level_max = pch_ctl2 >> 16; cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); if (!panel->backlight.pwm_level_max) panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); if (!panel->backlight.pwm_level_max) return -ENODEV; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); panel->backlight.pwm_enabled = pch_ctl1 & BLM_PCH_PWM_ENABLE; cpu_mode = panel->backlight.pwm_enabled && HAS_PCH_LPT(dev_priv) && !(pch_ctl1 & BLM_PCH_OVERRIDE_ENABLE) && (cpu_ctl2 & BLM_PWM_ENABLE); if (cpu_mode) { val = pch_get_backlight(connector, unused); drm_dbg_kms(&dev_priv->drm, "CPU backlight register was enabled, switching to PCH override\n"); /* Write converted CPU PWM value to PCH override register */ lpt_set_backlight(connector->base.state, val); intel_de_write(dev_priv, BLC_PWM_PCH_CTL1, pch_ctl1 | BLM_PCH_OVERRIDE_ENABLE); intel_de_write(dev_priv, BLC_PWM_CPU_CTL2, cpu_ctl2 & ~BLM_PWM_ENABLE); } return 0; } static int pch_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 cpu_ctl2, pch_ctl1, pch_ctl2; pch_ctl1 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL1); panel->backlight.active_low_pwm = pch_ctl1 & BLM_PCH_POLARITY; pch_ctl2 = intel_de_read(dev_priv, BLC_PWM_PCH_CTL2); panel->backlight.pwm_level_max = pch_ctl2 >> 16; if (!panel->backlight.pwm_level_max) panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); if (!panel->backlight.pwm_level_max) return -ENODEV; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); cpu_ctl2 = intel_de_read(dev_priv, BLC_PWM_CPU_CTL2); panel->backlight.pwm_enabled = (cpu_ctl2 & BLM_PWM_ENABLE) && (pch_ctl1 & BLM_PCH_PWM_ENABLE); return 0; } static int i9xx_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 ctl, val; ctl = intel_de_read(dev_priv, BLC_PWM_CTL); if (DISPLAY_VER(dev_priv) == 2 || IS_I915GM(dev_priv) || IS_I945GM(dev_priv)) panel->backlight.combination_mode = ctl & BLM_LEGACY_MODE; if (IS_PINEVIEW(dev_priv)) panel->backlight.active_low_pwm = ctl & BLM_POLARITY_PNV; panel->backlight.pwm_level_max = ctl >> 17; if (!panel->backlight.pwm_level_max) { panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); panel->backlight.pwm_level_max >>= 1; } if (!panel->backlight.pwm_level_max) return -ENODEV; if (panel->backlight.combination_mode) panel->backlight.pwm_level_max *= 0xff; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); val = i9xx_get_backlight(connector, unused); val = intel_panel_invert_pwm_level(connector, val); val = clamp(val, panel->backlight.pwm_level_min, panel->backlight.pwm_level_max); panel->backlight.pwm_enabled = val != 0; return 0; } static int i965_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 ctl, ctl2; ctl2 = intel_de_read(dev_priv, BLC_PWM_CTL2); panel->backlight.combination_mode = ctl2 & BLM_COMBINATION_MODE; panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; ctl = intel_de_read(dev_priv, BLC_PWM_CTL); panel->backlight.pwm_level_max = ctl >> 16; if (!panel->backlight.pwm_level_max) panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); if (!panel->backlight.pwm_level_max) return -ENODEV; if (panel->backlight.combination_mode) panel->backlight.pwm_level_max *= 0xff; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; return 0; } static int vlv_setup_backlight(struct intel_connector *connector, enum pipe pipe) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 ctl, ctl2; if (drm_WARN_ON(&dev_priv->drm, pipe != PIPE_A && pipe != PIPE_B)) return -ENODEV; ctl2 = intel_de_read(dev_priv, VLV_BLC_PWM_CTL2(pipe)); panel->backlight.active_low_pwm = ctl2 & BLM_POLARITY_I965; ctl = intel_de_read(dev_priv, VLV_BLC_PWM_CTL(pipe)); panel->backlight.pwm_level_max = ctl >> 16; if (!panel->backlight.pwm_level_max) panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); if (!panel->backlight.pwm_level_max) return -ENODEV; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); panel->backlight.pwm_enabled = ctl2 & BLM_PWM_ENABLE; return 0; } static int bxt_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 pwm_ctl, val; panel->backlight.controller = dev_priv->vbt.backlight.controller; pwm_ctl = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); /* Controller 1 uses the utility pin. */ if (panel->backlight.controller == 1) { val = intel_de_read(dev_priv, UTIL_PIN_CTL); panel->backlight.util_pin_active_low = val & UTIL_PIN_POLARITY; } panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; panel->backlight.pwm_level_max = intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); if (!panel->backlight.pwm_level_max) panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); if (!panel->backlight.pwm_level_max) return -ENODEV; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; return 0; } static int cnp_setup_backlight(struct intel_connector *connector, enum pipe unused) { struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; u32 pwm_ctl; /* * CNP has the BXT implementation of backlight, but with only one * controller. TODO: ICP has multiple controllers but we only use * controller 0 for now. */ panel->backlight.controller = 0; pwm_ctl = intel_de_read(dev_priv, BXT_BLC_PWM_CTL(panel->backlight.controller)); panel->backlight.active_low_pwm = pwm_ctl & BXT_BLC_PWM_POLARITY; panel->backlight.pwm_level_max = intel_de_read(dev_priv, BXT_BLC_PWM_FREQ(panel->backlight.controller)); if (!panel->backlight.pwm_level_max) panel->backlight.pwm_level_max = get_backlight_max_vbt(connector); if (!panel->backlight.pwm_level_max) return -ENODEV; panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); panel->backlight.pwm_enabled = pwm_ctl & BXT_BLC_PWM_ENABLE; return 0; } static int ext_pwm_setup_backlight(struct intel_connector *connector, enum pipe pipe) { struct drm_device *dev = connector->base.dev; struct drm_i915_private *dev_priv = to_i915(dev); struct intel_panel *panel = &connector->panel; const char *desc; u32 level; /* Get the right PWM chip for DSI backlight according to VBT */ if (dev_priv->vbt.dsi.config->pwm_blc == PPS_BLC_PMIC) { panel->backlight.pwm = pwm_get(dev->dev, "pwm_pmic_backlight"); desc = "PMIC"; } else { panel->backlight.pwm = pwm_get(dev->dev, "pwm_soc_backlight"); desc = "SoC"; } if (IS_ERR(panel->backlight.pwm)) { drm_err(&dev_priv->drm, "Failed to get the %s PWM chip\n", desc); panel->backlight.pwm = NULL; return -ENODEV; } panel->backlight.pwm_level_max = 100; /* 100% */ panel->backlight.pwm_level_min = get_backlight_min_vbt(connector); if (pwm_is_enabled(panel->backlight.pwm)) { /* PWM is already enabled, use existing settings */ pwm_get_state(panel->backlight.pwm, &panel->backlight.pwm_state); level = pwm_get_relative_duty_cycle(&panel->backlight.pwm_state, 100); level = intel_panel_invert_pwm_level(connector, level); panel->backlight.pwm_enabled = true; drm_dbg_kms(&dev_priv->drm, "PWM already enabled at freq %ld, VBT freq %d, level %d\n", NSEC_PER_SEC / (unsigned long)panel->backlight.pwm_state.period, get_vbt_pwm_freq(dev_priv), level); } else { /* Set period from VBT frequency, leave other settings at 0. */ panel->backlight.pwm_state.period = NSEC_PER_SEC / get_vbt_pwm_freq(dev_priv); } drm_info(&dev_priv->drm, "Using %s PWM for LCD backlight control\n", desc); return 0; } static void intel_pwm_set_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; panel->backlight.pwm_funcs->set(conn_state, intel_panel_invert_pwm_level(connector, level)); } static u32 intel_pwm_get_backlight(struct intel_connector *connector, enum pipe pipe) { struct intel_panel *panel = &connector->panel; return intel_panel_invert_pwm_level(connector, panel->backlight.pwm_funcs->get(connector, pipe)); } static void intel_pwm_enable_backlight(const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; panel->backlight.pwm_funcs->enable(crtc_state, conn_state, intel_panel_invert_pwm_level(connector, level)); } static void intel_pwm_disable_backlight(const struct drm_connector_state *conn_state, u32 level) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct intel_panel *panel = &connector->panel; panel->backlight.pwm_funcs->disable(conn_state, intel_panel_invert_pwm_level(connector, level)); } static int intel_pwm_setup_backlight(struct intel_connector *connector, enum pipe pipe) { struct intel_panel *panel = &connector->panel; int ret = panel->backlight.pwm_funcs->setup(connector, pipe); if (ret < 0) return ret; panel->backlight.min = panel->backlight.pwm_level_min; panel->backlight.max = panel->backlight.pwm_level_max; panel->backlight.level = intel_pwm_get_backlight(connector, pipe); panel->backlight.enabled = panel->backlight.pwm_enabled; return 0; } void intel_panel_update_backlight(struct intel_atomic_state *state, struct intel_encoder *encoder, const struct intel_crtc_state *crtc_state, const struct drm_connector_state *conn_state) { struct intel_connector *connector = to_intel_connector(conn_state->connector); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); struct intel_panel *panel = &connector->panel; if (!panel->backlight.present) return; mutex_lock(&dev_priv->backlight_lock); if (!panel->backlight.enabled) __intel_panel_enable_backlight(crtc_state, conn_state); mutex_unlock(&dev_priv->backlight_lock); } int intel_panel_setup_backlight(struct drm_connector *connector, enum pipe pipe) { struct drm_i915_private *dev_priv = to_i915(connector->dev); struct intel_connector *intel_connector = to_intel_connector(connector); struct intel_panel *panel = &intel_connector->panel; int ret; if (!dev_priv->vbt.backlight.present) { if (dev_priv->quirks & QUIRK_BACKLIGHT_PRESENT) { drm_dbg_kms(&dev_priv->drm, "no backlight present per VBT, but present per quirk\n"); } else { drm_dbg_kms(&dev_priv->drm, "no backlight present per VBT\n"); return 0; } } /* ensure intel_panel has been initialized first */ if (drm_WARN_ON(&dev_priv->drm, !panel->backlight.funcs)) return -ENODEV; /* set level and max in panel struct */ mutex_lock(&dev_priv->backlight_lock); ret = panel->backlight.funcs->setup(intel_connector, pipe); mutex_unlock(&dev_priv->backlight_lock); if (ret) { drm_dbg_kms(&dev_priv->drm, "failed to setup backlight for connector %s\n", connector->name); return ret; } panel->backlight.present = true; drm_dbg_kms(&dev_priv->drm, "Connector %s backlight initialized, %s, brightness %u/%u\n", connector->name, enableddisabled(panel->backlight.enabled), panel->backlight.level, panel->backlight.max); return 0; } static void intel_panel_destroy_backlight(struct intel_panel *panel) { /* dispose of the pwm */ if (panel->backlight.pwm) pwm_put(panel->backlight.pwm); panel->backlight.present = false; } static const struct intel_panel_bl_funcs bxt_pwm_funcs = { .setup = bxt_setup_backlight, .enable = bxt_enable_backlight, .disable = bxt_disable_backlight, .set = bxt_set_backlight, .get = bxt_get_backlight, .hz_to_pwm = bxt_hz_to_pwm, }; static const struct intel_panel_bl_funcs cnp_pwm_funcs = { .setup = cnp_setup_backlight, .enable = cnp_enable_backlight, .disable = cnp_disable_backlight, .set = bxt_set_backlight, .get = bxt_get_backlight, .hz_to_pwm = cnp_hz_to_pwm, }; static const struct intel_panel_bl_funcs lpt_pwm_funcs = { .setup = lpt_setup_backlight, .enable = lpt_enable_backlight, .disable = lpt_disable_backlight, .set = lpt_set_backlight, .get = lpt_get_backlight, .hz_to_pwm = lpt_hz_to_pwm, }; static const struct intel_panel_bl_funcs spt_pwm_funcs = { .setup = lpt_setup_backlight, .enable = lpt_enable_backlight, .disable = lpt_disable_backlight, .set = lpt_set_backlight, .get = lpt_get_backlight, .hz_to_pwm = spt_hz_to_pwm, }; static const struct intel_panel_bl_funcs pch_pwm_funcs = { .setup = pch_setup_backlight, .enable = pch_enable_backlight, .disable = pch_disable_backlight, .set = pch_set_backlight, .get = pch_get_backlight, .hz_to_pwm = pch_hz_to_pwm, }; static const struct intel_panel_bl_funcs ext_pwm_funcs = { .setup = ext_pwm_setup_backlight, .enable = ext_pwm_enable_backlight, .disable = ext_pwm_disable_backlight, .set = ext_pwm_set_backlight, .get = ext_pwm_get_backlight, }; static const struct intel_panel_bl_funcs vlv_pwm_funcs = { .setup = vlv_setup_backlight, .enable = vlv_enable_backlight, .disable = vlv_disable_backlight, .set = vlv_set_backlight, .get = vlv_get_backlight, .hz_to_pwm = vlv_hz_to_pwm, }; static const struct intel_panel_bl_funcs i965_pwm_funcs = { .setup = i965_setup_backlight, .enable = i965_enable_backlight, .disable = i965_disable_backlight, .set = i9xx_set_backlight, .get = i9xx_get_backlight, .hz_to_pwm = i965_hz_to_pwm, }; static const struct intel_panel_bl_funcs i9xx_pwm_funcs = { .setup = i9xx_setup_backlight, .enable = i9xx_enable_backlight, .disable = i9xx_disable_backlight, .set = i9xx_set_backlight, .get = i9xx_get_backlight, .hz_to_pwm = i9xx_hz_to_pwm, }; static const struct intel_panel_bl_funcs pwm_bl_funcs = { .setup = intel_pwm_setup_backlight, .enable = intel_pwm_enable_backlight, .disable = intel_pwm_disable_backlight, .set = intel_pwm_set_backlight, .get = intel_pwm_get_backlight, }; /* Set up chip specific backlight functions */ static void intel_panel_init_backlight_funcs(struct intel_panel *panel) { struct intel_connector *connector = container_of(panel, struct intel_connector, panel); struct drm_i915_private *dev_priv = to_i915(connector->base.dev); if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI && intel_dsi_dcs_init_backlight_funcs(connector) == 0) return; if (IS_GEMINILAKE(dev_priv) || IS_BROXTON(dev_priv)) { panel->backlight.pwm_funcs = &bxt_pwm_funcs; } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_CNP) { panel->backlight.pwm_funcs = &cnp_pwm_funcs; } else if (INTEL_PCH_TYPE(dev_priv) >= PCH_LPT) { if (HAS_PCH_LPT(dev_priv)) panel->backlight.pwm_funcs = &lpt_pwm_funcs; else panel->backlight.pwm_funcs = &spt_pwm_funcs; } else if (HAS_PCH_SPLIT(dev_priv)) { panel->backlight.pwm_funcs = &pch_pwm_funcs; } else if (IS_VALLEYVIEW(dev_priv) || IS_CHERRYVIEW(dev_priv)) { if (connector->base.connector_type == DRM_MODE_CONNECTOR_DSI) { panel->backlight.pwm_funcs = &ext_pwm_funcs; } else { panel->backlight.pwm_funcs = &vlv_pwm_funcs; } } else if (DISPLAY_VER(dev_priv) == 4) { panel->backlight.pwm_funcs = &i965_pwm_funcs; } else { panel->backlight.pwm_funcs = &i9xx_pwm_funcs; } if (connector->base.connector_type == DRM_MODE_CONNECTOR_eDP && intel_dp_aux_init_backlight_funcs(connector) == 0) return; /* We're using a standard PWM backlight interface */ panel->backlight.funcs = &pwm_bl_funcs; } enum drm_connector_status intel_panel_detect(struct drm_connector *connector, bool force) { struct drm_i915_private *i915 = to_i915(connector->dev); if (!INTEL_DISPLAY_ENABLED(i915)) return connector_status_disconnected; return connector_status_connected; } int intel_panel_init(struct intel_panel *panel, struct drm_display_mode *fixed_mode, struct drm_display_mode *downclock_mode) { intel_panel_init_backlight_funcs(panel); panel->fixed_mode = fixed_mode; panel->downclock_mode = downclock_mode; return 0; } void intel_panel_fini(struct intel_panel *panel) { struct intel_connector *intel_connector = container_of(panel, struct intel_connector, panel); intel_panel_destroy_backlight(panel); if (panel->fixed_mode) drm_mode_destroy(intel_connector->base.dev, panel->fixed_mode); if (panel->downclock_mode) drm_mode_destroy(intel_connector->base.dev, panel->downclock_mode); }
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