It looks like we should be reducing the group size when we don't
have a plane rather than when we do.

Bug: https://gitlab.freedesktop.org/drm/amd/issues/781
Fixes: 5fc0cbfad45648 ("drm/amd/display: determine if a pipe is synced by plane 
state")
Signed-off-by: Alex Deucher <[email protected]>
---
 drivers/gpu/drm/amd/display/dc/core/dc.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc.c 
b/drivers/gpu/drm/amd/display/dc/core/dc.c
index 3d89904003f0..01b27726d9c5 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc.c
@@ -1003,9 +1003,9 @@ static void program_timing_sync(
                                status->timing_sync_info.master = false;
 
                }
-               /* remove any other pipes with plane as they have already been 
synced */
+               /* remove any other pipes without plane as they have already 
been synced */
                for (j = j + 1; j < group_size; j++) {
-                       if (pipe_set[j]->plane_state) {
+                       if (!pipe_set[j]->plane_state) {
                                group_size--;
                                pipe_set[j] = pipe_set[group_size];
                                j--;
-- 
2.24.1

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