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 --- 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 = {