cregit-Linux how code gets into the kernel

Release 4.11 drivers/gpu/drm/msm/hdmi/hdmi_bridge.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 "hdmi.h"


struct hdmi_bridge {
	
struct drm_bridge base;
	
struct hdmi *hdmi;
};

#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)


void msm_hdmi_bridge_destroy(struct drm_bridge *bridge) { }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark888.89%266.67%
Arnd Bergmann111.11%133.33%
Total9100.00%3100.00%


static void msm_hdmi_power_on(struct drm_bridge *bridge) { struct drm_device *dev = bridge->dev; struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); struct hdmi *hdmi = hdmi_bridge->hdmi; const struct hdmi_platform_config *config = hdmi->config; int i, ret; for (i = 0; i < config->pwr_reg_cnt; i++) { ret = regulator_enable(hdmi->pwr_regs[i]); if (ret) { dev_err(dev->dev, "failed to enable pwr regulator: %s (%d)\n", config->pwr_reg_names[i], ret); } } if (config->pwr_clk_cnt > 0) { DBG("pixclock: %lu", hdmi->pixclock); ret = clk_set_rate(hdmi->pwr_clks[0], hdmi->pixclock); if (ret) { dev_err(dev->dev, "failed to set pixel clk: %s (%d)\n", config->pwr_clk_names[0], ret); } } for (i = 0; i < config->pwr_clk_cnt; i++) { ret = clk_prepare_enable(hdmi->pwr_clks[i]); if (ret) { dev_err(dev->dev, "failed to enable pwr clk: %s (%d)\n", config->pwr_clk_names[i], ret); } } }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark21899.54%266.67%
Arnd Bergmann10.46%133.33%
Total219100.00%3100.00%


static void power_off(struct drm_bridge *bridge) { struct drm_device *dev = bridge->dev; struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); struct hdmi *hdmi = hdmi_bridge->hdmi; const struct hdmi_platform_config *config = hdmi->config; int i, ret; /* TODO do we need to wait for final vblank somewhere before * cutting the clocks? */ mdelay(16 + 4); for (i = 0; i < config->pwr_clk_cnt; i++) clk_disable_unprepare(hdmi->pwr_clks[i]); for (i = 0; i < config->pwr_reg_cnt; i++) { ret = regulator_disable(hdmi->pwr_regs[i]); if (ret) { dev_err(dev->dev, "failed to disable pwr regulator: %s (%d)\n", config->pwr_reg_names[i], ret); } } }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark140100.00%1100.00%
Total140100.00%1100.00%


static void msm_hdmi_bridge_pre_enable(struct drm_bridge *bridge) { struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); struct hdmi *hdmi = hdmi_bridge->hdmi; struct hdmi_phy *phy = hdmi->phy; DBG("power up"); if (!hdmi->power_on) { msm_hdmi_phy_resource_enable(phy); msm_hdmi_power_on(bridge); hdmi->power_on = true; msm_hdmi_audio_update(hdmi); } msm_hdmi_phy_powerup(phy, hdmi->pixclock); msm_hdmi_set_mode(hdmi, true); if (hdmi->hdcp_ctrl) msm_hdmi_hdcp_on(hdmi->hdcp_ctrl); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark8077.67%350.00%
Jilai Wang1211.65%116.67%
Arnd Bergmann76.80%116.67%
Archit Taneja43.88%116.67%
Total103100.00%6100.00%


static void msm_hdmi_bridge_enable(struct drm_bridge *bridge) { }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark990.00%150.00%
Arnd Bergmann110.00%150.00%
Total10100.00%2100.00%


static void msm_hdmi_bridge_disable(struct drm_bridge *bridge) { }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark990.00%150.00%
Arnd Bergmann110.00%150.00%
Total10100.00%2100.00%


static void msm_hdmi_bridge_post_disable(struct drm_bridge *bridge) { struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); struct hdmi *hdmi = hdmi_bridge->hdmi; struct hdmi_phy *phy = hdmi->phy; if (hdmi->hdcp_ctrl) msm_hdmi_hdcp_off(hdmi->hdcp_ctrl); DBG("power down"); msm_hdmi_set_mode(hdmi, false); msm_hdmi_phy_powerdown(phy); if (hdmi->power_on) { power_off(bridge); hdmi->power_on = false; msm_hdmi_audio_update(hdmi); msm_hdmi_phy_resource_disable(phy); } }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark7677.55%350.00%
Jilai Wang1212.24%116.67%
Arnd Bergmann66.12%116.67%
Archit Taneja44.08%116.67%
Total98100.00%6100.00%


static void msm_hdmi_bridge_mode_set(struct drm_bridge *bridge, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge); struct hdmi *hdmi = hdmi_bridge->hdmi; int hstart, hend, vstart, vend; uint32_t frame_ctrl; mode = adjusted_mode; hdmi->pixclock = mode->clock * 1000; hstart = mode->htotal - mode->hsync_start; hend = mode->htotal - mode->hsync_start + mode->hdisplay; vstart = mode->vtotal - mode->vsync_start - 1; vend = mode->vtotal - mode->vsync_start + mode->vdisplay - 1; DBG("htotal=%d, vtotal=%d, hstart=%d, hend=%d, vstart=%d, vend=%d", mode->htotal, mode->vtotal, hstart, hend, vstart, vend); hdmi_write(hdmi, REG_HDMI_TOTAL, HDMI_TOTAL_H_TOTAL(mode->htotal - 1) | HDMI_TOTAL_V_TOTAL(mode->vtotal - 1)); hdmi_write(hdmi, REG_HDMI_ACTIVE_HSYNC, HDMI_ACTIVE_HSYNC_START(hstart) | HDMI_ACTIVE_HSYNC_END(hend)); hdmi_write(hdmi, REG_HDMI_ACTIVE_VSYNC, HDMI_ACTIVE_VSYNC_START(vstart) | HDMI_ACTIVE_VSYNC_END(vend)); if (mode->flags & DRM_MODE_FLAG_INTERLACE) { hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2, HDMI_VSYNC_TOTAL_F2_V_TOTAL(mode->vtotal)); hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2, HDMI_VSYNC_ACTIVE_F2_START(vstart + 1) | HDMI_VSYNC_ACTIVE_F2_END(vend + 1)); } else { hdmi_write(hdmi, REG_HDMI_VSYNC_TOTAL_F2, HDMI_VSYNC_TOTAL_F2_V_TOTAL(0)); hdmi_write(hdmi, REG_HDMI_VSYNC_ACTIVE_F2, HDMI_VSYNC_ACTIVE_F2_START(0) | HDMI_VSYNC_ACTIVE_F2_END(0)); } frame_ctrl = 0; if (mode->flags & DRM_MODE_FLAG_NHSYNC) frame_ctrl |= HDMI_FRAME_CTRL_HSYNC_LOW; if (mode->flags & DRM_MODE_FLAG_NVSYNC) frame_ctrl |= HDMI_FRAME_CTRL_VSYNC_LOW; if (mode->flags & DRM_MODE_FLAG_INTERLACE) frame_ctrl |= HDMI_FRAME_CTRL_INTERLACED_EN; DBG("frame_ctrl=%08x", frame_ctrl); hdmi_write(hdmi, REG_HDMI_FRAME_CTRL, frame_ctrl); msm_hdmi_audio_update(hdmi); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark33499.40%266.67%
Arnd Bergmann20.60%133.33%
Total336100.00%3100.00%

static const struct drm_bridge_funcs msm_hdmi_bridge_funcs = { .pre_enable = msm_hdmi_bridge_pre_enable, .enable = msm_hdmi_bridge_enable, .disable = msm_hdmi_bridge_disable, .post_disable = msm_hdmi_bridge_post_disable, .mode_set = msm_hdmi_bridge_mode_set, }; /* initialize bridge */
struct drm_bridge *msm_hdmi_bridge_init(struct hdmi *hdmi) { struct drm_bridge *bridge = NULL; struct hdmi_bridge *hdmi_bridge; int ret; hdmi_bridge = devm_kzalloc(hdmi->dev->dev, sizeof(*hdmi_bridge), GFP_KERNEL); if (!hdmi_bridge) { ret = -ENOMEM; goto fail; } hdmi_bridge->hdmi = hdmi; bridge = &hdmi_bridge->base; bridge->funcs = &msm_hdmi_bridge_funcs; ret = drm_bridge_attach(hdmi->encoder, bridge, NULL); if (ret) goto fail; return bridge; fail: if (bridge) msm_hdmi_bridge_destroy(bridge); return ERR_PTR(ret); }

Contributors

PersonTokensPropCommitsCommitProp
Rob Clark10889.26%233.33%
Ajay Kumar75.79%233.33%
Arnd Bergmann32.48%116.67%
Laurent Pinchart32.48%116.67%
Total121100.00%6100.00%


Overall Contributors

PersonTokensPropCommitsCommitProp
Rob Clark103593.67%440.00%
Arnd Bergmann282.53%110.00%
Jilai Wang242.17%110.00%
Archit Taneja80.72%110.00%
Ajay Kumar70.63%220.00%
Laurent Pinchart30.27%110.00%
Total1105100.00%10100.00%
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