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drm/amd/display: polling vid stream status in hpo dp blank 

[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@amd.com>
Acked-by: Jasdeep Dhillon <jdhillon@amd.com>
Signed-off-by: Wenjing Liu <wenjing.liu@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Wenjing Liu 2022-09-15 15:23:38 -04:00 committed by Alex Deucher
parent 5caa63c7b7
commit e32df0c7ec
1 changed files with 3 additions and 3 deletions
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6
drivers/gpu/drm/amd/display/dc/dcn31/dcn31_hpo_dp_stream_encoder.c
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@ -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,