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drm/amd/display: Increase DP blank timeout from 30 ms to 50 ms

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[Why]
At 24 Hz, a frame is 41.7 ms, so a 30 ms wait can (and does often)
timeout.

[How]
Bump timeout from 30 ms to 50 ms.

Signed-off-by: Ken Chalmers <ken.chalmers@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Ken Chalmers 2019-02-15 09:31:52 -06:00 committed by Alex Deucher
parent 30eb85ff42
commit 3af91bb150
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c
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@ -797,10 +797,10 @@ void enc1_stream_encoder_dp_blank(
*/ */
REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_DIS_DEFER, 2); REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_DIS_DEFER, 2);
/* Larger delay to wait until VBLANK - use max retry of /* Larger delay to wait until VBLANK - use max retry of
* 10us*3000=30ms. This covers 16.6ms of typical 60 Hz mode + * 10us*5000=50ms. This covers 41.7ms of minimum 24 Hz mode +
* a little more because we may not trust delay accuracy. * a little more because we may not trust delay accuracy.
*/ */
max_retries = DP_BLANK_MAX_RETRY * 150; max_retries = DP_BLANK_MAX_RETRY * 250;
/* disable DP stream */ /* disable DP stream */
REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, 0); REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, 0);