From: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Date: Tue, 6 Dec 2022 16:10:22 -0500
Subject: [PATCH] drm/amd/display: Defer DIG FIFO disable after VID stream
enable
References: bsc#1012628
Patch-mainline: 6.2.3
Git-commit: 2d90a1c054831338d57b39aec4d273cf3e867590
[ Upstream commit 2d90a1c054831338d57b39aec4d273cf3e867590 ]
[Why]
On some monitors we see a brief flash of corruption during the
monitor disable sequence caused by FIFO being disabled in the middle
of an active DP stream.
[How]
Wait until DP vid stream is disabled before turning off the FIFO.
The FIFO reset on DP unblank should take care of clearing any FIFO
error, if any.
Acked-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Nicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Reviewed-by: Syed Hassan <Syed.Hassan@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
---
.../drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c
index 38842f93..0926db01 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn314/dcn314_dio_stream_encoder.c
@@ -278,10 +278,10 @@ static void enc314_stream_encoder_dp_blank(
struct dc_link *link,
struct stream_encoder *enc)
{
- /* New to DCN314 - disable the FIFO before VID stream disable. */
- enc314_disable_fifo(enc);
-
enc1_stream_encoder_dp_blank(link, enc);
+
+ /* Disable FIFO after the DP vid stream is disabled to avoid corruption. */
+ enc314_disable_fifo(enc);
}
static void enc314_stream_encoder_dp_unblank(
--
2.35.3