static int exynos_dp_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct exynos_dp_platdata *pdata = pdev->dev.platform_data;
struct exynos_dp_device *dp = platform_get_drvdata(pdev);
if (pdata && pdata->phy_init)
pdata->phy_init();
clk_enable(dp->clock);
exynos_dp_init_dp(dp);
exynos_dp_detect_hpd(dp);
exynos_dp_handle_edid(dp);
exynos_dp_set_link_train(dp, dp->video_info->lane_count,
dp->video_info->link_rate);
exynos_dp_enable_scramble(dp, 1);
exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
exynos_dp_enable_enhanced_mode(dp, 1);
exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
exynos_dp_init_video(dp);
exynos_dp_config_video(dp, dp->video_info);
return 0;
}
static void exynos_dp_commit(struct drm_encoder *encoder)
{
struct exynos_dp_device *dp = encoder_to_dp(encoder);
int ret;
/* Keep the panel disabled while we configure video */
if (dp->panel) {
if (drm_panel_disable(dp->panel))
DRM_ERROR("failed to disable the panel\n");
}
ret = exynos_dp_detect_hpd(dp);
if (ret) {
/* Cable has been disconnected, we're done */
return;
}
ret = exynos_dp_handle_edid(dp);
if (ret) {
dev_err(dp->dev, "unable to handle edid\n");
return;
}
ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
dp->video_info->link_rate);
if (ret) {
dev_err(dp->dev, "unable to do link train\n");
return;
}
exynos_dp_enable_scramble(dp, 1);
exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
exynos_dp_enable_enhanced_mode(dp, 1);
exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
exynos_dp_init_video(dp);
ret = exynos_dp_config_video(dp);
if (ret)
dev_err(dp->dev, "unable to config video\n");
/* Safe to enable the panel now */
if (dp->panel) {
if (drm_panel_enable(dp->panel))
DRM_ERROR("failed to enable the panel\n");
}
/* Enable video */
exynos_dp_start_video(dp);
}
static void exynos_dp_hotplug(struct work_struct *work)
{
struct exynos_dp_device *dp;
int ret;
dp = container_of(work, struct exynos_dp_device, hotplug_work);
ret = exynos_dp_detect_hpd(dp);
if (ret) {
/* Cable has been disconnected, we're done */
//return;
}
ret = exynos_dp_handle_edid(dp);
if (ret) {
dev_err(dp->dev, "unable to handle edid\n");
//return;
}
ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
dp->video_info->link_rate);
if (ret) {
dev_err(dp->dev, "unable to do link train\n");
return;
}
exynos_dp_enable_scramble(dp, 1);
exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
exynos_dp_enable_enhanced_mode(dp, 1);
exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
exynos_dp_init_video(dp);
ret = exynos_dp_config_video(dp);
if (ret)
dev_err(dp->dev, "unable to config video\n");
}
static int __devinit exynos_dp_probe(struct platform_device *pdev)
{
struct resource *res;
struct exynos_dp_device *dp;
struct exynos_dp_platdata *pdata;
int ret = 0;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
dp = kzalloc(sizeof(struct exynos_dp_device), GFP_KERNEL);
if (!dp) {
dev_err(&pdev->dev, "no memory for device data\n");
return -ENOMEM;
}
dp->dev = &pdev->dev;
dp->clock = clk_get(&pdev->dev, "dp");
if (IS_ERR(dp->clock)) {
dev_err(&pdev->dev, "failed to get clock\n");
ret = PTR_ERR(dp->clock);
goto err_dp;
}
clk_enable(dp->clock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!res) {
dev_err(&pdev->dev, "failed to get registers\n");
ret = -EINVAL;
goto err_clock;
}
res = request_mem_region(res->start, resource_size(res),
dev_name(&pdev->dev));
if (!res) {
dev_err(&pdev->dev, "failed to request registers region\n");
ret = -EINVAL;
goto err_clock;
}
dp->res = res;
dp->reg_base = ioremap(res->start, resource_size(res));
if (!dp->reg_base) {
dev_err(&pdev->dev, "failed to ioremap\n");
ret = -ENOMEM;
goto err_req_region;
}
dp->irq = platform_get_irq(pdev, 0);
if (!dp->irq) {
dev_err(&pdev->dev, "failed to get irq\n");
ret = -ENODEV;
goto err_ioremap;
}
ret = request_irq(dp->irq, exynos_dp_irq_handler, 0,
"exynos-dp", dp);
if (ret) {
dev_err(&pdev->dev, "failed to request irq\n");
goto err_ioremap;
}
dp->video_info = pdata->video_info;
if (pdata->phy_init)
pdata->phy_init();
exynos_dp_init_dp(dp);
ret = exynos_dp_detect_hpd(dp);
if (ret) {
dev_err(&pdev->dev, "unable to detect hpd\n");
goto err_irq;
}
exynos_dp_handle_edid(dp);
ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
dp->video_info->link_rate);
if (ret) {
dev_err(&pdev->dev, "unable to do link train\n");
goto err_irq;
}
exynos_dp_enable_scramble(dp, 1);
exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
exynos_dp_enable_enhanced_mode(dp, 1);
exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
exynos_dp_init_video(dp);
ret = exynos_dp_config_video(dp, dp->video_info);
if (ret) {
dev_err(&pdev->dev, "unable to config video\n");
goto err_irq;
}
platform_set_drvdata(pdev, dp);
return 0;
err_irq:
free_irq(dp->irq, dp);
err_ioremap:
iounmap(dp->reg_base);
err_req_region:
release_mem_region(res->start, resource_size(res));
err_clock:
clk_put(dp->clock);
err_dp:
kfree(dp);
return ret;
}
static int __devinit exynos_dp_probe(struct platform_device *pdev)
{
struct resource *res;
struct exynos_dp_device *dp;
struct exynos_dp_platdata *pdata;
int ret = 0;
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device),
GFP_KERNEL);
if (!dp) {
dev_err(&pdev->dev, "no memory for device data\n");
return -ENOMEM;
}
dp->dev = &pdev->dev;
dp->clock = devm_clk_get(&pdev->dev, "dp");
if (IS_ERR(dp->clock)) {
dev_err(&pdev->dev, "failed to get clock\n");
return PTR_ERR(dp->clock);
}
clk_prepare_enable(dp->clock);
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
dp->reg_base = devm_request_and_ioremap(&pdev->dev, res);
if (!dp->reg_base) {
dev_err(&pdev->dev, "failed to ioremap\n");
return -ENOMEM;
}
dp->irq = platform_get_irq(pdev, 0);
if (!dp->irq) {
dev_err(&pdev->dev, "failed to get irq\n");
return -ENODEV;
}
ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler, 0,
"exynos-dp", dp);
if (ret) {
dev_err(&pdev->dev, "failed to request irq\n");
return ret;
}
dp->video_info = pdata->video_info;
if (pdata->phy_init)
pdata->phy_init();
exynos_dp_init_dp(dp);
ret = exynos_dp_detect_hpd(dp);
if (ret) {
dev_err(&pdev->dev, "unable to detect hpd\n");
return ret;
}
exynos_dp_handle_edid(dp);
ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count,
dp->video_info->link_rate);
if (ret) {
dev_err(&pdev->dev, "unable to do link train\n");
return ret;
}
exynos_dp_enable_scramble(dp, 1);
exynos_dp_enable_rx_to_enhanced_mode(dp, 1);
exynos_dp_enable_enhanced_mode(dp, 1);
exynos_dp_set_lane_count(dp, dp->video_info->lane_count);
exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate);
exynos_dp_init_video(dp);
ret = exynos_dp_config_video(dp, dp->video_info);
if (ret) {
dev_err(&pdev->dev, "unable to config video\n");
return ret;
}
platform_set_drvdata(pdev, dp);
return 0;
}