From: Alvin Lee <alvin.l...@amd.com>
[why]
In pipe split issue occurs when we program immediate flip while vsync flip is
pending
[how]
Don't program immediate flip until flip is no longer pending
Signed-off-by: Alvin Lee <alvin.l...@amd.com>
Reviewed-by: Jaehyun Chung <jaehyun.ch...@amd.com>
Acked-by: Leo Li <sunpeng...@amd.com>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
index a918f2770c38..9c0a788fbb18 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1283,6 +1283,17 @@ void dcn20_pipe_control_lock(
if (pipe->plane_state != NULL)
flip_immediate = pipe->plane_state->flip_immediate;
+ if (flip_immediate && lock) {
+ while
(pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->plane_res.hubp)) {
+ udelay(1);
+ }
+
+ if (pipe->bottom_pipe != NULL)
+ while
(pipe->bottom_pipe->plane_res.hubp->funcs->hubp_is_flip_pending(pipe->bottom_pipe->plane_res.hubp))
{
+ udelay(1);
+ }
+ }
+
/* In flip immediate and pipe splitting case, we need to use GSL
* for synchronization. Only do setup on locking and on flip type
change.
*/
--
2.22.0
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