This is a note to let you know that I've just added the patch titled
drm/amd/display: polling vid stream status in hpo dp blank
to the 6.0-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amd-display-polling-vid-stream-status-in-hpo-dp-.patch
and it can be found in the queue-6.0 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d34aeb44fef901d6b41c1c1b1621f3e867253ac2
Author: Wenjing Liu <wenjing.liu@xxxxxxx>
Date: Thu Sep 15 15:23:38 2022 -0400
drm/amd/display: polling vid stream status in hpo dp blank
[ Upstream commit e32df0c7ecead95d70ca89f39b1b2b02a59ff691 ]
[why]
vid stream control is double bufferred, if we don't wait for video
stream enable set to 0, we may get temporary image corruption
showing on the stream when setting PIXEL_TO_SYMBOL_FIFO_ENABLE to 0.
Reviewed-by: Ariel Bernstein <Eric.Bernstein@xxxxxxx>
Acked-by: Jasdeep Dhillon <jdhillon@xxxxxxx>
Signed-off-by: Wenjing Liu <wenjing.liu@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c
index 23621ff08c90..52fb2bf3d578 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c
@@ -150,9 +150,9 @@ static void dcn31_hpo_dp_stream_enc_dp_blank(
* 10us*5000=50ms. This covers 41.7ms of minimum 24 Hz mode +
* a little more because we may not trust delay accuracy.
*/
- //REG_WAIT(DP_SYM32_ENC_VID_STREAM_CONTROL,
- // VID_STREAM_STATUS, 0,
- // 10, 5000);
+ REG_WAIT(DP_SYM32_ENC_VID_STREAM_CONTROL,
+ VID_STREAM_STATUS, 0,
+ 10, 5000);
/* Disable SDP tranmission */
REG_UPDATE(DP_SYM32_ENC_SDP_CONTROL,
