static void exynos_dp_poweron(struct exynos_drm_display *display)
{
struct exynos_dp_device *dp = display_to_dp(display);
if (dp->dpms_mode == DRM_MODE_DPMS_ON)
return;
if (dp->panel) {
if (drm_panel_prepare(dp->panel)) {
DRM_ERROR("failed to setup the panel\n");
return;
}
}
clk_prepare_enable(dp->clock);
exynos_dp_phy_init(dp);
exynos_dp_init_dp(dp);
enable_irq(dp->irq);
exynos_dp_commit(display);
}
static int exynos_dp_resume(struct device *dev)
{
struct exynos_dp_platdata *pdata = dev->platform_data;
struct exynos_dp_device *dp = dev_get_drvdata(dev);
if (dev->of_node) {
if (dp->phy_addr)
exynos_dp_phy_init(dp);
} else {
if (pdata->phy_init)
pdata->phy_init();
}
clk_prepare_enable(dp->clock);
exynos_dp_init_dp(dp);
enable_irq(dp->irq);
return 0;
}
static int exynos_dp_bind(struct device *dev, struct device *master, void *data)
{
struct exynos_dp_device *dp = dev_get_drvdata(dev);
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm_dev = data;
struct resource *res;
unsigned int irq_flags;
int ret = 0;
dp->dev = &pdev->dev;
dp->dpms_mode = DRM_MODE_DPMS_OFF;
dp->video_info = exynos_dp_dt_parse_pdata(&pdev->dev);
if (IS_ERR(dp->video_info))
return PTR_ERR(dp->video_info);
dp->phy = devm_phy_get(dp->dev, "dp");
if (IS_ERR(dp->phy)) {
dev_err(dp->dev, "no DP phy configured\n");
ret = PTR_ERR(dp->phy);
if (ret) {
/*
* phy itself is not enabled, so we can move forward
* assigning NULL to phy pointer.
*/
if (ret == -ENOSYS || ret == -ENODEV)
dp->phy = NULL;
else
return ret;
}
}
if (!dp->panel) {
ret = exynos_dp_dt_parse_panel(dp);
if (ret)
return ret;
}
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_ioremap_resource(&pdev->dev, res);
if (IS_ERR(dp->reg_base))
return PTR_ERR(dp->reg_base);
dp->hpd_gpio = of_get_named_gpio(dev->of_node, "samsung,hpd-gpio", 0);
if (gpio_is_valid(dp->hpd_gpio)) {
/*
* Set up the hotplug GPIO from the device tree as an interrupt.
* Simply specifying a different interrupt in the device tree
* doesn't work since we handle hotplug rather differently when
* using a GPIO. We also need the actual GPIO specifier so
* that we can get the current state of the GPIO.
*/
ret = devm_gpio_request_one(&pdev->dev, dp->hpd_gpio, GPIOF_IN,
"hpd_gpio");
if (ret) {
dev_err(&pdev->dev, "failed to get hpd gpio\n");
return ret;
}
dp->irq = gpio_to_irq(dp->hpd_gpio);
irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING;
} else {
dp->hpd_gpio = -ENODEV;
dp->irq = platform_get_irq(pdev, 0);
irq_flags = 0;
}
if (dp->irq == -ENXIO) {
dev_err(&pdev->dev, "failed to get irq\n");
return -ENODEV;
}
INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug);
exynos_dp_phy_init(dp);
exynos_dp_init_dp(dp);
ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler,
irq_flags, "exynos-dp", dp);
if (ret) {
dev_err(&pdev->dev, "failed to request irq\n");
return ret;
}
disable_irq(dp->irq);
dp->drm_dev = drm_dev;
return exynos_drm_create_enc_conn(drm_dev, &dp->display);
}
static int exynos_dp_probe(struct platform_device *pdev)
{
struct resource *res;
struct exynos_dp_device *dp;
struct exynos_dp_platdata *pdata;
int ret = 0;
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;
if (pdev->dev.of_node) {
pdata = exynos_dp_dt_parse_pdata(&pdev->dev);
if (IS_ERR(pdata))
return PTR_ERR(pdata);
ret = exynos_dp_dt_parse_phydata(dp);
if (ret)
return ret;
} else {
pdata = pdev->dev.platform_data;
if (!pdata) {
dev_err(&pdev->dev, "no platform data\n");
return -EINVAL;
}
}
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_ioremap_resource(&pdev->dev, res);
if (IS_ERR(dp->reg_base))
return PTR_ERR(dp->reg_base);
dp->irq = platform_get_irq(pdev, 0);
if (dp->irq == -ENXIO) {
dev_err(&pdev->dev, "failed to get irq\n");
return -ENODEV;
}
INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug);
dp->video_info = pdata->video_info;
if (pdev->dev.of_node) {
if (dp->phy_addr)
exynos_dp_phy_init(dp);
} else {
if (pdata->phy_init)
pdata->phy_init();
}
exynos_dp_init_dp(dp);
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;
}
platform_set_drvdata(pdev, dp);
schedule_work(&dp->hotplug_work);
return 0;
}