1 files changed, 39 insertions, 0 deletions
diff --git a/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1141-drm-amd-display-Know-what-a-pageflip-is.patch b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1141-drm-amd-display-Know-what-a-pageflip-is.patch
new file mode 100644
index 00000000..bb26786f
--- /dev/null
+++ b/meta-amd-bsp/recipes-kernel/linux-4.19/linux-yocto-4.19.8/1141-drm-amd-display-Know-what-a-pageflip-is.patch
@@ -0,0 +1,39 @@
+From 079c9aaa26f89cf4a8cfcb0b6971a6fd0e09890c Mon Sep 17 00:00:00 2001
+From: David Francis <David.Francis@amd.com>
+Date: Wed, 12 Dec 2018 14:11:53 -0500
+Subject: [PATCH 1141/2940] drm/amd/display: Know what a pageflip is
+
+[Why]
+We were assuming that any commit with allow_modeset == false
+was a pageflip.  This was against drm intention and only
+worked by sheer luck
+
+[How]
+A pageflip is the change from one framebuffer to another
+
+Signed-off-by: David Francis <David.Francis@amd.com>
+Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
+Reviewed-by: Nicholas Kazlauskas <Nicholas.Kazlauskas@amd.com>
+Acked-by: Leo Li <sunpeng.li@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+---
+ drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 ++-
+ 1 file changed, 2 insertions(+), 1 deletion(-)
+
+diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+index 0c18b1e89b5d..dca90c2ad22b 100644
+--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
++++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+@@ -4714,7 +4714,8 @@ static void amdgpu_dm_commit_planes(struct drm_atomic_state *state,
+ 		if (!new_crtc_state->active)
+ 			continue;
+ 
+-		pflip_needed = !state->allow_modeset;
++		pflip_needed = old_plane_state->fb &&
++			old_plane_state->fb != new_plane_state->fb;
+ 
+ 		dc_plane = dm_new_plane_state->dc_state;
+ 
+-- 
+2.17.1
+