[PATCH 2/3] drm/exynos: add runtime pm support for mixer
Rahul Sharma
rahul.sharma at samsung.com
Tue Nov 27 22:00:24 PST 2012
This patch adds support for runtime power management for
drm mixer 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_mixer.c | 65 +++++++++++++++++++++++++++++----
1 files changed, 58 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 0d3ed28..b15b770 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -679,8 +679,6 @@ static void mixer_poweron(struct mixer_context *ctx)
ctx->powered = true;
mutex_unlock(&ctx->mixer_mutex);
- pm_runtime_get_sync(ctx->dev);
-
clk_enable(res->mixer);
if (ctx->vp_enabled) {
clk_enable(res->vp);
@@ -710,8 +708,6 @@ static void mixer_poweroff(struct mixer_context *ctx)
clk_disable(res->sclk_mixer);
}
- pm_runtime_put_sync(ctx->dev);
-
mutex_lock(&ctx->mixer_mutex);
ctx->powered = false;
@@ -754,12 +750,14 @@ static void mixer_dpms(void *ctx, int mode)
switch (mode) {
case DRM_MODE_DPMS_ON:
- mixer_poweron(mixer_ctx);
+ if (pm_runtime_suspended(mixer_ctx->dev))
+ pm_runtime_get_sync(mixer_ctx->dev);
break;
case DRM_MODE_DPMS_STANDBY:
case DRM_MODE_DPMS_SUSPEND:
case DRM_MODE_DPMS_OFF:
- mixer_poweroff(mixer_ctx);
+ if (!pm_runtime_suspended(mixer_ctx->dev))
+ pm_runtime_put_sync(mixer_ctx->dev);
break;
default:
DRM_DEBUG_KMS("unknown dpms mode: %d\n", mode);
@@ -1193,13 +1191,66 @@ static int mixer_suspend(struct device *dev)
struct exynos_drm_hdmi_context *drm_hdmi_ctx = get_mixer_context(dev);
struct mixer_context *ctx = drm_hdmi_ctx->ctx;
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ if (pm_runtime_suspended(dev)) {
+ DRM_DEBUG_KMS("%s : Already suspended\n", __func__);
+ return 0;
+ }
+
mixer_poweroff(ctx);
return 0;
}
+
+static int mixer_resume(struct device *dev)
+{
+ struct exynos_drm_hdmi_context *drm_hdmi_ctx = get_mixer_context(dev);
+ struct mixer_context *ctx = drm_hdmi_ctx->ctx;
+
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ if (!pm_runtime_suspended(dev)) {
+ DRM_DEBUG_KMS("%s : Already resumed\n", __func__);
+ return 0;
+ }
+
+ mixer_poweron(ctx);
+
+ return 0;
+}
#endif
-static SIMPLE_DEV_PM_OPS(mixer_pm_ops, mixer_suspend, NULL);
+#ifdef CONFIG_PM_RUNTIME
+static int mixer_runtime_suspend(struct device *dev)
+{
+ struct exynos_drm_hdmi_context *drm_hdmi_ctx = get_mixer_context(dev);
+ struct mixer_context *ctx = drm_hdmi_ctx->ctx;
+
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ mixer_poweroff(ctx);
+
+ return 0;
+}
+
+static int mixer_runtime_resume(struct device *dev)
+{
+ struct exynos_drm_hdmi_context *drm_hdmi_ctx = get_mixer_context(dev);
+ struct mixer_context *ctx = drm_hdmi_ctx->ctx;
+
+ DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
+
+ mixer_poweron(ctx);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops mixer_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(mixer_suspend, mixer_resume)
+ SET_RUNTIME_PM_OPS(mixer_runtime_suspend, mixer_runtime_resume, NULL)
+};
struct platform_driver mixer_driver = {
.driver = {
--
1.7.0.4
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