From: Alvin Lee <Alvin.Lee2@xxxxxxx>
[Description]
- Wait for vblank during front end programming
for global sync to ensure all double buffer
updates take.
- This prevents underflow in some cases.
Reviewed-by: Martin Leung <Martin.Leung@xxxxxxx>
Acked-by: Alan Liu <HaoPing.Liu@xxxxxxx>
Signed-off-by: Alvin Lee <Alvin.Lee2@xxxxxxx>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 1 +
1 file changed, 1 insertion(+)
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 f3334f513eb4..b465a83bde6f 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1663,6 +1663,7 @@ static void dcn20_program_pipe(
pipe_ctx->pipe_dlg_param.vupdate_width);
if (pipe_ctx->stream->mall_stream_config.type != SUBVP_PHANTOM) {
+ pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VBLANK);
pipe_ctx->stream_res.tg->funcs->wait_for_state(pipe_ctx->stream_res.tg, CRTC_STATE_VACTIVE);
}
--
2.25.1
