From: Wenjing Liu <wenjing.liu@xxxxxxx> [ 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> --- .../drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) 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, -- 2.35.1
