From: Jun Lei <Jun.Lei@xxxxxxx>
[why]
Previous workaround to prevent a vsync flip to be converted
to immediate flip is no longer needed, and is risky because
there are cases where it can result in infinite loop.
[how]
Remove wait loop (which is potentially infinite) before locking
pipe
Signed-off-by: Jun Lei <Jun.Lei@xxxxxxx>
Reviewed-by: Charlene Liu <Charlene.Liu@xxxxxxx>
Reviewed-by: Eric Yang <eric.yang2@xxxxxxx>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 11 -----------
1 file changed, 11 deletions(-)
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 fb7a244eafca..69d600183db8 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1107,17 +1107,6 @@ 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.
*/
--
2.17.1
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