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/*
* 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;
bool power_on;
unsigned long int pixclock;
};
#define to_hdmi_bridge(x) container_of(x, struct hdmi_bridge, base)
static void hdmi_bridge_destroy(struct drm_bridge *bridge)
{
struct hdmi_bridge *hdmi_bridge = to_hdmi_bridge(bridge);
hdmi_unreference(hdmi_bridge->hdmi);
drm_bridge_cleanup(bridge);
kfree(hdmi_bridge);
}
static void 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_bridge->pixclock);
ret = clk_set_rate(hdmi->pwr_clks[0], hdmi_bridge->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);
}
}
}
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);
}
}
}
static void 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_bridge->power_on) {
power_on(bridge);
hdmi_bridge->power_on = true;
}
phy->funcs->powerup(phy, hdmi_bridge->pixclock);
hdmi_set_mode(hdmi, true);
}
static void hdmi_bridge_enable(struct drm_bridge *bridge)
{
}
static void hdmi_bridge_disable(struct drm_bridge *bridge)
{
}
static void 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;
DBG("power down");
hdmi_set_mode(hdmi, false);
phy->funcs->powerdown(phy);
if (hdmi_bridge->power_on) {
power_off(bridge);
hdmi_bridge->power_on = false;
}
}
static void 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_bridge->pixclock = mode->clock * 1000;
hdmi->hdmi_mode = drm_match_cea_mode(mode) > 1;
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);
// TODO until we have audio, this might be safest:
if (hdmi->hdmi_mode)
hdmi_write(hdmi, REG_HDMI_GC, HDMI_GC_MUTE);
}
static const struct drm_bridge_funcs hdmi_bridge_funcs = {
.pre_enable = hdmi_bridge_pre_enable,
.enable = hdmi_bridge_enable,
.disable = hdmi_bridge_disable,
.post_disable = hdmi_bridge_post_disable,
.mode_set = hdmi_bridge_mode_set,
.destroy = hdmi_bridge_destroy,
};
/* initialize bridge */
struct drm_bridge *hdmi_bridge_init(struct hdmi *hdmi)
{
struct drm_bridge *bridge = NULL;
struct hdmi_bridge *hdmi_bridge;
int ret;
hdmi_bridge = kzalloc(sizeof(*hdmi_bridge), GFP_KERNEL);
if (!hdmi_bridge) {
ret = -ENOMEM;
goto fail;
}
hdmi_bridge->hdmi = hdmi_reference(hdmi);
bridge = &hdmi_bridge->base;
drm_bridge_init(hdmi->dev, bridge, &hdmi_bridge_funcs);
return bridge;
fail:
if (bridge)
hdmi_bridge_destroy(bridge);
return ERR_PTR(ret);
}
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