[PATCH AUTOSEL 5.2 10/70] drm/stm: attach gem fence to atomic state

[Sasha Levin]

From: Ahmad Fatoum <a.fatoum at pengutronix.de>

[ Upstream commit 8fabc9c3109a71b3577959a05408153ae69ccd8d ]

To properly synchronize with other devices the fence from the GEM
object backing the framebuffer needs to be attached to the atomic
state, so the commit work can wait on fence signaling.

Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
Acked-by: Philippe Cornu <philippe.cornu at st.com>
Tested-by: Philippe Cornu <philippe.cornu at st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard at linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190712084228.8338-1-l.stach@pengutronix.de
Signed-off-by: Sasha Levin <sashal at kernel.org>
---
 drivers/gpu/drm/stm/ltdc.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 32fd6a3b37fb1..6f1fef76671c8 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -25,6 +25,7 @@
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_fourcc.h>
 #include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_plane_helper.h>
 #include <drm/drm_probe_helper.h>
@@ -875,6 +876,7 @@ static const struct drm_plane_funcs ltdc_plane_funcs = {
 };
 
 static const struct drm_plane_helper_funcs ltdc_plane_helper_funcs = {
+	.prepare_fb = drm_gem_fb_prepare_fb,
 	.atomic_check = ltdc_plane_atomic_check,
 	.atomic_update = ltdc_plane_atomic_update,
 	.atomic_disable = ltdc_plane_atomic_disable,
-- 
2.20.1