This patch adds runtime power management support for exynos drm
hdmi driver.
Signed-off-by: Rahul Sharma <rahul.sharma at samsung.com>
Signed-off-by: Shirish S <s.shirish at samsung.com>
---
drivers/gpu/drm/exynos/exynos_hdmi.c | 60 +++++++++++++++++++++++++++++----
1 files changed, 52 insertions(+), 8 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c
b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 59839cc..a85fc58 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -2064,8 +2064,6 @@ static void hdmi_poweron(struct hdmi_context *hdata)
mutex_unlock(&hdata->hdmi_mutex);
- pm_runtime_get_sync(hdata->dev);
-
regulator_bulk_enable(res->regul_count, res->regul_bulk);
clk_enable(res->hdmiphy);
clk_enable(res->hdmi);
@@ -2094,8 +2092,6 @@ static void hdmi_poweroff(struct hdmi_context *hdata)
clk_disable(res->hdmiphy);
regulator_bulk_disable(res->regul_count, res->regul_bulk);
- pm_runtime_put_sync(hdata->dev);
-
mutex_lock(&hdata->hdmi_mutex);
hdata->powered = false;
@@ -2108,16 +2104,18 @@ static void hdmi_dpms(void *ctx, int mode)
{
struct hdmi_context *hdata = ctx;
- DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+ DRM_DEBUG_KMS("[%d] %s mode %d\n", __LINE__, __func__, mode);
switch (mode) {
case DRM_MODE_DPMS_ON:
- hdmi_poweron(hdata);
+ if (pm_runtime_suspended(hdata->dev))
+ pm_runtime_get_sync(hdata->dev);
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_OFF:
- hdmi_poweroff(hdata);
+ if (!pm_runtime_suspended(hdata->dev))
+ pm_runtime_put_sync(hdata->dev);
break;
default:
DRM_DEBUG_KMS("unknown dpms mode: %d\n", mode);
@@ -2540,6 +2538,8 @@ static int hdmi_suspend(struct device *dev)
struct exynos_drm_hdmi_context *ctx = get_hdmi_context(dev);
struct hdmi_context *hdata = ctx->ctx;
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
disable_irq(hdata->internal_irq);
disable_irq(hdata->external_irq);
@@ -2547,6 +2547,11 @@ static int hdmi_suspend(struct device *dev)
if (ctx->drm_dev)
drm_helper_hpd_irq_event(ctx->drm_dev);
+ if (pm_runtime_suspended(dev)) {
+ DRM_DEBUG_KMS("%s : Already suspended\n", __func__);
+ return 0;
+ }
+
hdmi_poweroff(hdata);
return 0;
@@ -2557,13 +2562,52 @@ static int hdmi_resume(struct device *dev)
struct exynos_drm_hdmi_context *ctx = get_hdmi_context(dev);
struct hdmi_context *hdata = ctx->ctx;
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ hdata->hpd = gpio_get_value(hdata->hpd_gpio);
+
enable_irq(hdata->external_irq);
enable_irq(hdata->internal_irq);
+
+ if (!pm_runtime_suspended(dev)) {
+ DRM_DEBUG_KMS("%s : Already resumed\n", __func__);
+ return 0;
+ }
+
+ hdmi_poweron(hdata);
+
+ return 0;
+}
+#endif
+
+#ifdef CONFIG_PM_RUNTIME
+static int hdmi_runtime_suspend(struct device *dev)
+{
+ struct exynos_drm_hdmi_context *ctx = get_hdmi_context(dev);
+ struct hdmi_context *hdata = ctx->ctx;
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ hdmi_poweroff(hdata);
+
+ return 0;
+}
+
+static int hdmi_runtime_resume(struct device *dev)
+{
+ struct exynos_drm_hdmi_context *ctx = get_hdmi_context(dev);
+ struct hdmi_context *hdata = ctx->ctx;
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ hdmi_poweron(hdata);
+
return 0;
}
#endif
-static SIMPLE_DEV_PM_OPS(hdmi_pm_ops, hdmi_suspend, hdmi_resume);
+static const struct dev_pm_ops hdmi_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(hdmi_suspend, hdmi_resume)
+ SET_RUNTIME_PM_OPS(hdmi_runtime_suspend, hdmi_runtime_resume, NULL)
+};
struct platform_driver hdmi_driver = {
.probe = hdmi_probe,
--
1.7.0.4
