[PATCH] drm/exynos: add check for the device power status

[Shirish S]

The hdmi and mixer win_commit calls currently are
not checking the status of IP before updating the
respective registers, this patch adds this check.

Signed-off-by: Shirish S <s.shirish at samsung.com>
---
 drivers/gpu/drm/exynos/exynos_hdmi.c  | 3 +++
 drivers/gpu/drm/exynos/exynos_mixer.c | 3 +++
 2 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
index 2c46b6c..ae79688 100644
--- a/drivers/gpu/drm/exynos/exynos_hdmi.c
+++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
@@ -2170,6 +2170,9 @@ static void hdmi_commit(void *ctx)
 
 	DRM_DEBUG_KMS("[%d] %s\n", __LINE__, __func__);
 
+	if (!hdata->powered)
+		return;
+
 	hdmi_conf_apply(hdata);
 }
 
diff --git a/drivers/gpu/drm/exynos/exynos_mixer.c b/drivers/gpu/drm/exynos/exynos_mixer.c
index 21db895..4f5433f 100644
--- a/drivers/gpu/drm/exynos/exynos_mixer.c
+++ b/drivers/gpu/drm/exynos/exynos_mixer.c
@@ -775,6 +775,9 @@ static void mixer_win_commit(void *ctx, int win)
 
 	DRM_DEBUG_KMS("[%d] %s, win: %d\n", __LINE__, __func__, win);
 
+	if (!mixer_ctx->powered)
+		return;
+
 	if (win > 1 && mixer_ctx->vp_enabled)
 		vp_video_buffer(mixer_ctx, win);
 	else
-- 
1.8.0