1 files changed, 41 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0411-drm-amd-display-Fix-race.patch b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0411-drm-amd-display-Fix-race.patch
new file mode 100644
index 00000000..f6c4afc5
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux/linux-yocto-4.14.71/0411-drm-amd-display-Fix-race.patch
@@ -0,0 +1,41 @@
+From f64a2500a88d1ce8a257b26c07b809ef5c3cb4f6 Mon Sep 17 00:00:00 2001
+From: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
+Date: Fri, 5 May 2017 11:30:06 -0400
+Subject: [PATCH 0411/4131] drm/amd/display: Fix race.
+
+Problem :
+A race between two adjecent page flips makes the earlier one
+to release an alocated frame buffer for the subsequent one -
+since there are 2 frambuffer swapped back and forth between flips,
+the 'new' fb of the later flip is actually the 'previous' fb for the earlier flip.
+Fix:
+Don't set fb->address = 0 in cleanup hook, this is unnecessery and
+erases the newly cached adress that was set in prepare_fb of the second
+flip.
+
+Signed-off-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
+Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
+Acked-by: Harry Wentland <Harry.Wentland@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c | 4 +---
+ 1 file changed, 1 insertion(+), 3 deletions(-)
+
+diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+index a5218b6..00cc385 100644
+--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
+@@ -1793,9 +1793,7 @@ static void dm_plane_helper_cleanup_fb(
+ 		amdgpu_bo_unpin(rbo);
+ 		amdgpu_bo_unreserve(rbo);
+ 		amdgpu_bo_unref(&rbo);
+-	}
+-
+-	afb->address = 0;
++	};
+ }
+ 
+ int dm_create_validation_set_for_connector(struct drm_connector *connector,
+-- 
+2.7.4
+