[PATCH 4.19 006/106] drm/stm: attach gem fence to atomic state

[Greg Kroah-Hartman]

From: Ahmad Fatoum <a.fatoum@xxxxxxxxxxxxxx>

[ 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@xxxxxxxxxxxxxx>
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>
Acked-by: Philippe Cornu <philippe.cornu@xxxxxx>
Tested-by: Philippe Cornu <philippe.cornu@xxxxxx>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20190712084228.8338-1-l.stach@xxxxxxxxxxxxxx
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 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 808d9fb627e97..477d0a27b9a5d 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -19,6 +19,7 @@
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_fb_cma_helper.h>
 #include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drm_of.h>
 #include <drm/drm_bridge.h>
 #include <drm/drm_plane_helper.h>
@@ -825,6 +826,7 @@ 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