cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/msm/mdp/mdp4/mdp4_kms.c

/*
 * Copyright (C) 2013 Red Hat
 * Author: Rob Clark <robdclark@gmail.com>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 as published by
 * the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */


#include "msm_drv.h"
#include "msm_gem.h"
#include "msm_mmu.h"
#include "mdp4_kms.h"

static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev);


static int mdp4_hw_init(struct msm_kms *kms) { struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); struct drm_device *dev = mdp4_kms->dev; uint32_t version, major, minor, dmap_cfg, vg_cfg; unsigned long clk; int ret = 0; pm_runtime_get_sync(dev->dev); mdp4_enable(mdp4_kms); version = mdp4_read(mdp4_kms, REG_MDP4_VERSION); mdp4_disable(mdp4_kms); major = FIELD(version, MDP4_VERSION_MAJOR); minor = FIELD(version, MDP4_VERSION_MINOR); DBG("found MDP4 version v%d.%d", major, minor); if (major != 4) { dev_err(dev->dev, "unexpected MDP version: v%d.%d\n", major, minor); ret = -ENXIO; goto out; } mdp4_kms->rev = minor; if (mdp4_kms->rev > 1) { mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER0, 0x0707ffff); mdp4_write(mdp4_kms, REG_MDP4_CS_CONTROLLER1, 0x03073f3f); } mdp4_write(mdp4_kms, REG_MDP4_PORTMAP_MODE, 0x3); /* max read pending cmd config, 3 pending requests: */ mdp4_write(mdp4_kms, REG_MDP4_READ_CNFG, 0x02222); clk = clk_get_rate(mdp4_kms->clk); if ((mdp4_kms->rev >= 1) || (clk >= 90000000)) { dmap_cfg = 0x47; /* 16 bytes-burst x 8 req */ vg_cfg = 0x47; /* 16 bytes-burs x 8 req */ } else { dmap_cfg = 0x27; /* 8 bytes-burst x 8 req */ vg_cfg = 0x43; /* 16 bytes-burst x 4 req */ } DBG("fetch config: dmap=%02x, vg=%02x", dmap_cfg, vg_cfg); mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_P), dmap_cfg); mdp4_write(mdp4_kms, REG_MDP4_DMA_FETCH_CONFIG(DMA_E), dmap_cfg); mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG1), vg_cfg); mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(VG2), vg_cfg); mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB1), vg_cfg); mdp4_write(mdp4_kms, REG_MDP4_PIPE_FETCH_CONFIG(RGB2), vg_cfg); if (mdp4_kms->rev >= 2) mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG_UPDATE_METHOD, 1); mdp4_write(mdp4_kms, REG_MDP4_LAYERMIXER_IN_CFG, 0); /* disable CSC matrix / YUV by default: */ mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG1), 0); mdp4_write(mdp4_kms, REG_MDP4_PIPE_OP_MODE(VG2), 0); mdp4_write(mdp4_kms, REG_MDP4_DMA_P_OP_MODE, 0); mdp4_write(mdp4_kms, REG_MDP4_DMA_S_OP_MODE, 0); mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(1), 0); mdp4_write(mdp4_kms, REG_MDP4_OVLP_CSC_CONFIG(2), 0); if (mdp4_kms->rev > 1) mdp4_write(mdp4_kms, REG_MDP4_RESET_STATUS, 1); dev->mode_config.allow_fb_modifiers = true; out: pm_runtime_put_sync(dev->dev); return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark449100.00%6100.00%
Total449100.00%6100.00%


static void mdp4_prepare_commit(struct msm_kms *kms, struct drm_atomic_state *state) { struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); int i; struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; mdp4_enable(mdp4_kms); /* see 119ecb7fd */ for_each_crtc_in_state(state, crtc, crtc_state, i) drm_crtc_vblank_get(crtc); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark4368.25%150.00%
Daniel Vetter2031.75%150.00%
Total63100.00%2100.00%


static void mdp4_complete_commit(struct msm_kms *kms, struct drm_atomic_state *state) { struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); int i; struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; /* see 119ecb7fd */ for_each_crtc_in_state(state, crtc, crtc_state, i) drm_crtc_vblank_put(crtc); mdp4_disable(mdp4_kms); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark4774.60%150.00%
Daniel Vetter1625.40%150.00%
Total63100.00%2100.00%


static void mdp4_wait_for_crtc_commit_done(struct msm_kms *kms, struct drm_crtc *crtc) { mdp4_crtc_wait_for_commit_done(crtc); }

Contributors

PersonTokensPropCommitsCommitProp
Hai Li21100.00%1100.00%
Total21100.00%1100.00%


static long mdp4_round_pixclk(struct msm_kms *kms, unsigned long rate, struct drm_encoder *encoder) { /* if we had >1 encoder, we'd need something more clever: */ switch (encoder->encoder_type) { case DRM_MODE_ENCODER_TMDS: return mdp4_dtv_round_pixclk(encoder, rate); case DRM_MODE_ENCODER_LVDS: case DRM_MODE_ENCODER_DSI: default: return rate; } }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark2958.00%150.00%
Archit Taneja2142.00%150.00%
Total50100.00%2100.00%

static const char * const iommu_ports[] = { "mdp_port0_cb0", "mdp_port1_cb0", };
static void mdp4_destroy(struct msm_kms *kms) { struct mdp4_kms *mdp4_kms = to_mdp4_kms(to_mdp_kms(kms)); struct device *dev = mdp4_kms->dev->dev; struct msm_gem_address_space *aspace = mdp4_kms->aspace; if (mdp4_kms->blank_cursor_iova) msm_gem_put_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id); drm_gem_object_unreference_unlocked(mdp4_kms->blank_cursor_bo); if (aspace) { aspace->mmu->funcs->detach(aspace->mmu, iommu_ports, ARRAY_SIZE(iommu_ports)); msm_gem_address_space_destroy(aspace); } if (mdp4_kms->rpm_enabled) pm_runtime_disable(dev); kfree(mdp4_kms); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark8573.91%571.43%
Archit Taneja2219.13%114.29%
R Sricharan86.96%114.29%
Total115100.00%7100.00%

static const struct mdp_kms_funcs kms_funcs = { .base = { .hw_init = mdp4_hw_init, .irq_preinstall = mdp4_irq_preinstall, .irq_postinstall = mdp4_irq_postinstall, .irq_uninstall = mdp4_irq_uninstall, .irq = mdp4_irq, .enable_vblank = mdp4_enable_vblank, .disable_vblank = mdp4_disable_vblank, .prepare_commit = mdp4_prepare_commit, .complete_commit = mdp4_complete_commit, .wait_for_crtc_commit_done = mdp4_wait_for_crtc_commit_done, .get_format = mdp_get_format, .round_pixclk = mdp4_round_pixclk, .destroy = mdp4_destroy, }, .set_irqmask = mdp4_set_irqmask, };
int mdp4_disable(struct mdp4_kms *mdp4_kms) { DBG(""); clk_disable_unprepare(mdp4_kms->clk); if (mdp4_kms->pclk) clk_disable_unprepare(mdp4_kms->pclk); clk_disable_unprepare(mdp4_kms->lut_clk); if (mdp4_kms->axi_clk) clk_disable_unprepare(mdp4_kms->axi_clk); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark58100.00%2100.00%
Total58100.00%2100.00%


int mdp4_enable(struct mdp4_kms *mdp4_kms) { DBG(""); clk_prepare_enable(mdp4_kms->clk); if (mdp4_kms->pclk) clk_prepare_enable(mdp4_kms->pclk); clk_prepare_enable(mdp4_kms->lut_clk); if (mdp4_kms->axi_clk) clk_prepare_enable(mdp4_kms->axi_clk); return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark58100.00%2100.00%
Total58100.00%2100.00%


static struct device_node *mdp4_detect_lcdc_panel(struct drm_device *dev) { struct device_node *endpoint, *panel_node; struct device_node *np = dev->dev->of_node; /* * LVDS/LCDC is the first port described in the list of ports in the * MDP4 DT node. */ endpoint = of_graph_get_endpoint_by_regs(np, 0, -1); if (!endpoint) { DBG("no LVDS remote endpoint\n"); return NULL; } panel_node = of_graph_get_remote_port_parent(endpoint); if (!panel_node) { DBG("no valid panel node in LVDS endpoint\n"); of_node_put(endpoint); return NULL; } of_node_put(endpoint); return panel_node; }

Contributors

PersonTokensPropCommitsCommitProp
Archit Taneja7174.74%375.00%
Rob Clark2425.26%125.00%
Total95100.00%4100.00%


static int mdp4_modeset_init_intf(struct mdp4_kms *mdp4_kms, int intf_type) { struct drm_device *dev = mdp4_kms->dev; struct msm_drm_private *priv = dev->dev_private; struct drm_encoder *encoder; struct drm_connector *connector; struct device_node *panel_node; int dsi_id; int ret; switch (intf_type) { case DRM_MODE_ENCODER_LVDS: /* * bail out early if there is no panel node (no need to * initialize LCDC encoder and LVDS connector) */ panel_node = mdp4_detect_lcdc_panel(dev); if (!panel_node) return 0; encoder = mdp4_lcdc_encoder_init(dev, panel_node); if (IS_ERR(encoder)) { dev_err(dev->dev, "failed to construct LCDC encoder\n"); return PTR_ERR(encoder); } /* LCDC can be hooked to DMA_P (TODO: Add DMA_S later?) */ encoder->possible_crtcs = 1 << DMA_P; connector = mdp4_lvds_connector_init(dev, panel_node, encoder); if (IS_ERR(connector)) { dev_err(dev->dev, "failed to initialize LVDS connector\n"); return PTR_ERR(connector); } priv->encoders[priv->num_encoders++] = encoder; priv->connectors[priv->num_connectors++] = connector; break; case DRM_MODE_ENCODER_TMDS: encoder = mdp4_dtv_encoder_init(dev); if (IS_ERR(encoder)) { dev_err(dev->dev, "failed to construct DTV encoder\n"); return PTR_ERR(encoder); } /* DTV can be hooked to DMA_E: */ encoder->possible_crtcs = 1 << 1; if (priv->hdmi) { /* Construct bridge/connector for HDMI: */ ret = msm_hdmi_modeset_init(priv->hdmi, dev, encoder); if (ret) { dev_err(dev->dev, "failed to initialize HDMI: %d\n", ret); return ret; } } priv->encoders[priv->num_encoders++] = encoder; break; case DRM_MODE_ENCODER_DSI: /* only DSI1 supported for now */ dsi_id = 0; if (!priv->dsi[dsi_id]) break; encoder = mdp4_dsi_encoder_init(dev); if (IS_ERR(encoder)) { ret = PTR_ERR(encoder); dev_err(dev->dev, "failed to construct DSI encoder: %d\n", ret); return ret; } /* TODO: Add DMA_S later? */ encoder->possible_crtcs = 1 << DMA_P; priv->encoders[priv->num_encoders++] = encoder; ret = msm_dsi_modeset_init(priv->dsi[dsi_id], dev, encoder); if (ret) { dev_err(dev->dev, "failed to initialize DSI: %d\n", ret); return ret; } break; default: dev_err(dev->dev, "Invalid or unsupported interface\n"); return -EINVAL; } return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Archit Taneja24760.39%550.00%
Rob Clark16139.36%440.00%
Arnd Bergmann10.24%110.00%
Total409100.00%10100.00%


static int modeset_init(struct mdp4_kms *mdp4_kms) { struct drm_device *dev = mdp4_kms->dev; struct msm_drm_private *priv = dev->dev_private; struct drm_plane *plane; struct drm_crtc *crtc; int i, ret; static const enum mdp4_pipe rgb_planes[] = { RGB1, RGB2, }; static const enum mdp4_pipe vg_planes[] = { VG1, VG2, }; static const enum mdp4_dma mdp4_crtcs[] = { DMA_P, DMA_E, }; static const char * const mdp4_crtc_names[] = { "DMA_P", "DMA_E", }; static const int mdp4_intfs[] = { DRM_MODE_ENCODER_LVDS, DRM_MODE_ENCODER_DSI, DRM_MODE_ENCODER_TMDS, }; /* construct non-private planes: */ for (i = 0; i < ARRAY_SIZE(vg_planes); i++) { plane = mdp4_plane_init(dev, vg_planes[i], false); if (IS_ERR(plane)) { dev_err(dev->dev, "failed to construct plane for VG%d\n", i + 1); ret = PTR_ERR(plane); goto fail; } priv->planes[priv->num_planes++] = plane; } for (i = 0; i < ARRAY_SIZE(mdp4_crtcs); i++) { plane = mdp4_plane_init(dev, rgb_planes[i], true); if (IS_ERR(plane)) { dev_err(dev->dev, "failed to construct plane for RGB%d\n", i + 1); ret = PTR_ERR(plane); goto fail; } crtc = mdp4_crtc_init(dev, plane, priv->num_crtcs, i, mdp4_crtcs[i]); if (IS_ERR(crtc)) { dev_err(dev->dev, "failed to construct crtc for %s\n", mdp4_crtc_names[i]); ret = PTR_ERR(crtc); goto fail; } priv->crtcs[priv->num_crtcs++] = crtc; } /* * we currently set up two relatively fixed paths: * * LCDC/LVDS path: RGB1 -> DMA_P -> LCDC -> LVDS * or * DSI path: RGB1 -> DMA_P -> DSI1 -> DSI Panel * * DTV/HDMI path: RGB2 -> DMA_E -> DTV -> HDMI */ for (i = 0; i < ARRAY_SIZE(mdp4_intfs); i++) { ret = mdp4_modeset_init_intf(mdp4_kms, mdp4_intfs[i]); if (ret) { dev_err(dev->dev, "failed to initialize intf: %d, %d\n", i, ret); goto fail; } } return 0; fail: return ret; }

Contributors

PersonTokensPropCommitsCommitProp
Archit Taneja21055.56%233.33%
Rob Clark16844.44%466.67%
Total378100.00%6100.00%


struct msm_kms *mdp4_kms_init(struct drm_device *dev) { struct platform_device *pdev = dev->platformdev; struct mdp4_platform_config *config = mdp4_get_config(pdev); struct mdp4_kms *mdp4_kms; struct msm_kms *kms = NULL; struct msm_gem_address_space *aspace; int irq, ret; mdp4_kms = kzalloc(sizeof(*mdp4_kms), GFP_KERNEL); if (!mdp4_kms) { dev_err(dev->dev, "failed to allocate kms\n"); ret = -ENOMEM; goto fail; } mdp_kms_init(&mdp4_kms->base, &kms_funcs); kms = &mdp4_kms->base.base; mdp4_kms->dev = dev; mdp4_kms->mmio = msm_ioremap(pdev, NULL, "MDP4"); if (IS_ERR(mdp4_kms->mmio)) { ret = PTR_ERR(mdp4_kms->mmio); goto fail; } irq = platform_get_irq(pdev, 0); if (irq < 0) { ret = irq; dev_err(dev->dev, "failed to get irq: %d\n", ret); goto fail; } kms->irq = irq; /* NOTE: driver for this regulator still missing upstream.. use * _get_exclusive() and ignore the error if it does not exist * (and hope that the bootloader left it on for us) */ mdp4_kms->vdd = devm_regulator_get_exclusive(&pdev->dev, "vdd"); if (IS_ERR(mdp4_kms->vdd)) mdp4_kms->vdd = NULL; if (mdp4_kms->vdd) { ret = regulator_enable(mdp4_kms->vdd); if (ret) { dev_err(dev->dev, "failed to enable regulator vdd: %d\n", ret); goto fail; } } mdp4_kms->clk = devm_clk_get(&pdev->dev, "core_clk"); if (IS_ERR(mdp4_kms->clk)) { dev_err(dev->dev, "failed to get core_clk\n"); ret = PTR_ERR(mdp4_kms->clk); goto fail; } mdp4_kms->pclk = devm_clk_get(&pdev->dev, "iface_clk"); if (IS_ERR(mdp4_kms->pclk)) mdp4_kms->pclk = NULL; // XXX if (rev >= MDP_REV_42) { ??? mdp4_kms->lut_clk = devm_clk_get(&pdev->dev, "lut_clk"); if (IS_ERR(mdp4_kms->lut_clk)) { dev_err(dev->dev, "failed to get lut_clk\n"); ret = PTR_ERR(mdp4_kms->lut_clk); goto fail; } mdp4_kms->axi_clk = devm_clk_get(&pdev->dev, "bus_clk"); if (IS_ERR(mdp4_kms->axi_clk)) { dev_err(dev->dev, "failed to get axi_clk\n"); ret = PTR_ERR(mdp4_kms->axi_clk); goto fail; } clk_set_rate(mdp4_kms->clk, config->max_clk); clk_set_rate(mdp4_kms->lut_clk, config->max_clk); pm_runtime_enable(dev->dev); mdp4_kms->rpm_enabled = true; /* make sure things are off before attaching iommu (bootloader could * have left things on, in which case we'll start getting faults if * we don't disable): */ mdp4_enable(mdp4_kms); mdp4_write(mdp4_kms, REG_MDP4_DTV_ENABLE, 0); mdp4_write(mdp4_kms, REG_MDP4_LCDC_ENABLE, 0); mdp4_write(mdp4_kms, REG_MDP4_DSI_ENABLE, 0); mdp4_disable(mdp4_kms); mdelay(16); if (config->iommu) { aspace = msm_gem_address_space_create(&pdev->dev, config->iommu, "mdp4"); if (IS_ERR(aspace)) { ret = PTR_ERR(aspace); goto fail; } mdp4_kms->aspace = aspace; ret = aspace->mmu->funcs->attach(aspace->mmu, iommu_ports, ARRAY_SIZE(iommu_ports)); if (ret) goto fail; } else { dev_info(dev->dev, "no iommu, fallback to phys " "contig buffers for scanout\n"); aspace = NULL; } mdp4_kms->id = msm_register_address_space(dev, aspace); if (mdp4_kms->id < 0) { ret = mdp4_kms->id; dev_err(dev->dev, "failed to register mdp4 iommu: %d\n", ret); goto fail; } ret = modeset_init(mdp4_kms); if (ret) { dev_err(dev->dev, "modeset_init failed: %d\n", ret); goto fail; } mutex_lock(&dev->struct_mutex); mdp4_kms->blank_cursor_bo = msm_gem_new(dev, SZ_16K, MSM_BO_WC); mutex_unlock(&dev->struct_mutex); if (IS_ERR(mdp4_kms->blank_cursor_bo)) { ret = PTR_ERR(mdp4_kms->blank_cursor_bo); dev_err(dev->dev, "could not allocate blank-cursor bo: %d\n", ret); mdp4_kms->blank_cursor_bo = NULL; goto fail; } ret = msm_gem_get_iova(mdp4_kms->blank_cursor_bo, mdp4_kms->id, &mdp4_kms->blank_cursor_iova); if (ret) { dev_err(dev->dev, "could not pin blank-cursor bo: %d\n", ret); goto fail; } dev->mode_config.min_width = 0; dev->mode_config.min_height = 0; dev->mode_config.max_width = 2048; dev->mode_config.max_height = 2048; return kms; fail: if (kms) mdp4_destroy(kms); return ERR_PTR(ret); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark73989.25%1071.43%
Archit Taneja576.88%321.43%
Hai Li323.86%17.14%
Total828100.00%14100.00%


static struct mdp4_platform_config *mdp4_get_config(struct platform_device *dev) { static struct mdp4_platform_config config = {}; /* TODO: Chips that aren't apq8064 have a 200 Mhz max_clk */ config.max_clk = 266667000; config.iommu = iommu_domain_alloc(&platform_bus_type); if (config.iommu) { config.iommu->geometry.aperture_start = 0x1000; config.iommu->geometry.aperture_end = 0xffffffff; } return &config; }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark6898.55%375.00%
Archit Taneja11.45%125.00%
Total69100.00%4100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Rob Clark203273.15%1954.29%
Archit Taneja62922.64%1131.43%
Hai Li582.09%25.71%
Daniel Vetter361.30%12.86%
R Sricharan220.79%12.86%
Arnd Bergmann10.04%12.86%
Total2778100.00%35100.00%
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.