From: Wenjing Liu <Wenjing.Liu@amd.com>
Date: Tue, 11 Jun 2019 22:18:36 +0000 (-0400)
Subject: drm/amd/display: wait for the whole frame after global unlock
X-Git-Tag: v5.3-rc2~20^2^2~20
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=dd5d9348da02dd83dbb235e55aa0acb3f48ccc95;p=thirdparty%2Fkernel%2Flinux.git

drm/amd/display: wait for the whole frame after global unlock

[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@amd.com>
Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

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 710727e5d0f88..e5e78aa930a67 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn20/dcn20_hwseq.c
@@ -1242,6 +1242,8 @@ 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);
 	}