Patch "drm/exynos/decon5433: set STANDALONE_UPDATE_F also if planes are disabled" has been added to the 4.9-stable tree

This is a note to let you know that I've just added the patch titled

drm/exynos/decon5433: set STANDALONE_UPDATE_F also if planes are disabled

to the 4.9-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
drm-exynos-decon5433-set-standalone_update_f-also-if-planes-are-disabled.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree, please let <[email protected]> know about it.

From: Andrzej Hajda <[email protected]>
Date: Fri, 13 Jan 2017 10:20:58 +0100
Subject: drm/exynos/decon5433: set STANDALONE_UPDATE_F also if planes are disabled

From: Andrzej Hajda <[email protected]>

[ Upstream commit 821b40b79db7dedbfe15ab330dfd181e661a533f ]

STANDALONE_UPDATE_F should be set if something changed in plane configurations, including plane disable.
The patch fixes page-faults bugs, caused by decon still using framebuffers of disabled planes.

v2: fixed clear-bit code (Thx Marek)
v3: use test_and_clear_bit (Thx Joonyoung)

---
 drivers/gpu/drm/exynos/exynos5433_drm_decon.c |    8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

@@ -46,7 +46,8 @@ enum decon_flag_bits {
 	BIT_CLKS_ENABLED,
 	BIT_IRQS_ENABLED,
 	BIT_WIN_UPDATED,
-	BIT_SUSPENDED
+	BIT_SUSPENDED,
+	BIT_REQUEST_UPDATE
 };
 
 struct decon_context {

@@ -313,6 +314,7 @@ static void decon_update_plane(struct ex
 
 	/* window enable */
 	decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, ~0);
+	set_bit(BIT_REQUEST_UPDATE, &ctx->flags);
 }
 
 static void decon_disable_plane(struct exynos_drm_crtc *crtc,

@@ -325,6 +327,7 @@ static void decon_disable_plane(struct e
 		return;
 
 	decon_set_bits(ctx, DECON_WINCONx(win), WINCONx_ENWIN_F, 0);
+	set_bit(BIT_REQUEST_UPDATE, &ctx->flags);
 }
 
 static void decon_atomic_flush(struct exynos_drm_crtc *crtc)

@@ -338,8 +341,7 @@ static void decon_atomic_flush(struct ex
 	for (i = ctx->first_win; i < WINDOWS_NR; i++)
 		decon_shadow_protect_win(ctx, i, false);
 
-	/* update iff there are active windows */
-	if (crtc->base.state->plane_mask)
+	if (test_and_clear_bit(BIT_REQUEST_UPDATE, &ctx->flags))
 		decon_set_bits(ctx, DECON_UPDATE, STANDALONE_UPDATE_F, ~0);
 
 	if (ctx->out_type & IFTYPE_I80)

Patches currently in stable-queue which might be from [email protected] are

queue-4.9/drm-exynos-decon5433-set-standalone_update_f-also-if-planes-are-disabled.patch queue-4.9/drm-exynos-decon5433-update-shadow-registers-iff-there-are-active-windows.patch queue-4.9/drm-exynos-decon5433-set-standalone_update_f-on-output-enablement.patch