[PATCH] drm/sun4i: wait on implicit fence before display

[Qiang Yu]

Render like lima will attach a fence to the framebuffer
dma_buf, display like sun4i should wait it finish before
show the framebuffer. Otherwise tearing will be observed.

Signed-off-by: Qiang Yu <yuq825@xxxxxxxxx>
---
 drivers/gpu/drm/sun4i/sun4i_layer.c    | 2 ++
 drivers/gpu/drm/sun4i/sun8i_ui_layer.c | 2 ++
 drivers/gpu/drm/sun4i/sun8i_vi_layer.c | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_layer.c b/drivers/gpu/drm/sun4i/sun4i_layer.c
index 750ad24de1d7..d68e663df9a0 100644
--- a/drivers/gpu/drm/sun4i/sun4i_layer.c
+++ b/drivers/gpu/drm/sun4i/sun4i_layer.c
@@ -12,6 +12,7 @@
 
 #include <drm/drm_atomic_helper.h>
 #include <drm/drm_plane_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
 #include <drm/drmP.h>
 
 #include "sun4i_backend.h"
@@ -114,6 +115,7 @@ static void sun4i_backend_layer_atomic_update(struct drm_plane *plane,
 }
 
 static const struct drm_plane_helper_funcs sun4i_backend_layer_helper_funcs = {
+	.prepare_fb	= drm_gem_fb_prepare_fb,
 	.atomic_disable	= sun4i_backend_layer_atomic_disable,
 	.atomic_update	= sun4i_backend_layer_atomic_update,
 };
diff --git a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c b/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
index 28c15c6ef1ef..7bc2ca2bd0c3 100644
--- a/drivers/gpu/drm/sun4i/sun8i_ui_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_ui_layer.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_plane_helper.h>
 #include <drm/drmP.h>
 
@@ -287,6 +288,7 @@ static void sun8i_ui_layer_atomic_update(struct drm_plane *plane,
 }
 
 static struct drm_plane_helper_funcs sun8i_ui_layer_helper_funcs = {
+	.prepare_fb	= drm_gem_fb_prepare_fb,
 	.atomic_check	= sun8i_ui_layer_atomic_check,
 	.atomic_disable	= sun8i_ui_layer_atomic_disable,
 	.atomic_update	= sun8i_ui_layer_atomic_update,
diff --git a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
index f4fe97813f94..815895795afd 100644
--- a/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
+++ b/drivers/gpu/drm/sun4i/sun8i_vi_layer.c
@@ -13,6 +13,7 @@
 #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_plane_helper.h>
 #include <drm/drmP.h>
 
@@ -315,6 +316,7 @@ static void sun8i_vi_layer_atomic_update(struct drm_plane *plane,
 }
 
 static struct drm_plane_helper_funcs sun8i_vi_layer_helper_funcs = {
+	.prepare_fb	= drm_gem_fb_prepare_fb,
 	.atomic_check	= sun8i_vi_layer_atomic_check,
 	.atomic_disable	= sun8i_vi_layer_atomic_disable,
 	.atomic_update	= sun8i_vi_layer_atomic_update,
-- 
2.17.1