From: Inki Dae <inki.dae@samsung.com>
Date: Wed, 14 Nov 2012 11:41:35 +0000 (+0900)
Subject: drm/exynos: fix overlay updating issue
X-Git-Tag: firefly_0821_release~3680^2~1383^2~14^2~29
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=8e8755dd8f9ca8a0da4c4cbff164fc42b4456539;p=firefly-linux-kernel-4.4.55.git

drm/exynos: fix overlay updating issue

Chagelog v2:
Move encoder's dpms updating into exynos_drm_encoder_commit
function because when crtc's dpms is updated, encoder's dpms
is updated also. This would induce the issue that encoder
isn't disabled after crtc is disabled.

Changelog v1:
This patch fixes a issue that overlay data aren't applied
to real hardware when dpms off goes to on after setcrtc
was requested like below,
    dpms off -> setcrtc -> dpms off -> dpms on

For this, it makes encoder's dpms to be updated when
setcrtc is requested.

Signed-off-by: Inki Dae <inki.dae@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
---

diff --git a/drivers/gpu/drm/exynos/exynos_drm_encoder.c b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
index 241ad1eeec64..607231a71b2d 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_encoder.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_encoder.c
@@ -226,6 +226,12 @@ static void exynos_drm_encoder_commit(struct drm_encoder *encoder)
 	 * already updated or not by exynos_drm_encoder_dpms function.
 	 */
 	exynos_encoder->updated = true;
+
+	/*
+	 * In case of setcrtc, there is no way to update encoder's dpms
+	 * so update it here.
+	 */
+	exynos_encoder->dpms = DRM_MODE_DPMS_ON;
 }
 
 static void exynos_drm_encoder_disable(struct drm_encoder *encoder)