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%3Ba=su...

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 stable@vger.kernel.org know about it.

From foo@baz Wed Dec 6 17:39:55 CET 2017

From: Andrzej Hajda a.hajda@samsung.com 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 a.hajda@samsung.com

[ 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)

Signed-off-by: Andrzej Hajda a.hajda@samsung.com Tested-by: Joonyoung Shim jy0922.shim@samsung.com Signed-off-by: Inki Dae inki.dae@samsung.com Signed-off-by: Sasha Levin alexander.levin@verizon.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/exynos/exynos5433_drm_decon.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)

--- a/drivers/gpu/drm/exynos/exynos5433_drm_decon.c +++ b/drivers/gpu/drm/exynos/exynos5433_drm_decon.c @@ -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 a.hajda@samsung.com 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