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Commit 000f1308 authored by Rahul Sharma's avatar Rahul Sharma Committed by Inki Dae
Browse files

drm/exynos: add runtime pm support for mixer 



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

Signed-off-by: default avatarRahul Sharma <rahul.sharma@samsung.com>
Signed-off-by: default avatarShirish S <s.shirish@samsung.com>
Signed-off-by: default avatarInki Dae <inki.dae@samsung.com>
parent 64327cb3

drivers/gpu/drm/exynos/exynos_mixer.c

+58 −7
Original line number Diff line number Diff line
@@ -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 = {