[PATCH 23/87] drm/amd/display: wait for the whole frame after global unlock

[sunpeng.li at amd.com]

From: Wenjing Liu <Wenjing.Liu at amd.com>

[why]
The current code will not wait for the entire frame
 after global unlock.
This causes dsc dynamic target bpp update corruption when
there is a surface update immediately happens after this.

[how]
Wait for the entire whole frame after unlock before continuing
the rest of stream and surface update.

Signed-off-by: Wenjing Liu <Wenjing.Liu at amd.com>
Reviewed-by: Jun Lei <Jun.Lei at amd.com>
Acked-by: Leo Li <sunpeng.li at amd.com>
---
 drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c | 2 ++
 1 file changed, 2 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 f820e9667e3c..7c08f81000c5 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1256,6 +1256,8 @@ void dcn20_pipe_control_lock_global(
 				CRTC_STATE_VACTIVE);
 		pipe->stream_res.tg->funcs->wait_for_state(pipe->stream_res.tg,
 				CRTC_STATE_VBLANK);
+		pipe->stream_res.tg->funcs->wait_for_state(pipe->stream_res.tg,
+				CRTC_STATE_VACTIVE);
 		pipe->stream_res.tg->funcs->lock_doublebuffer_disable(
 				pipe->stream_res.tg);
 	}
-- 
2.22.0