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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
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