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drm/exynos: add runtime pm support for mixer

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This patch adds support for runtime power management for
drm mixer driver.

Signed-off-by: Rahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: Shirish S <s.shirish@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>
This commit is contained in:
Rahul Sharma 2012-11-28 11:30:24 +05:30 committed by Inki Dae
parent 64327cb35a
commit 000f13083d
1 changed files with 58 additions and 7 deletions
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65
drivers/gpu/drm/exynos/exynos_mixer.c
View file

@ -872,8 +872,6 @@ 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);
@ -907,8 +905,6 @@ 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;
@ -924,12 +920,14 @@ 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);
@ -1249,13 +1247,66 @@ 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 = {