From: Haiyi Zhou <[email protected]>
[WHY]
Skipping vblank during global sync update request can result in
underflow on certain displays.
[HOW]
Roll back to the previous behavior where DC waits for vblank during pipe
programming.
Fixes: 5d3e14421410 ("drm/amd/display: do not wait for vblank during pipe
programming")
Reviewed-by: Martin Leung <[email protected]>
Acked-by: Rodrigo Siqueira <[email protected]>
Signed-off-by: Haiyi Zhou <[email protected]>
---
drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 6 ++----
1 file changed, 2 insertions(+), 4 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 1ac0ed5be605..feff834d5410 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1640,10 +1640,8 @@ 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);
+
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);
}
pipe_ctx->stream_res.tg->funcs->set_vtg_params(
--
2.35.1
