From: Wesley Chalmers <Wesley.Chalmers@xxxxxxx> [WHY] When disabling DP video, the current REG_WAIT timeout of 50ms is too low for certain cases with very high VSYNC intervals. [HOW] Increase the timeout to 102ms, so that refresh rates as low as 10Hz can be handled properly. Signed-off-by: Wesley Chalmers <Wesley.Chalmers@xxxxxxx> Reviewed-by: Aric Cyr <Aric.Cyr@xxxxxxx> Acked-by: Qingqing Zhuo <qingqing.zhuo@xxxxxxx> Cc: <stable@xxxxxxxxxxxxxxx> --- drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c index 9cf139be3f40..f70fcadf1ee5 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c +++ b/drivers/gpu/drm/amd/display/dc/dcn10/dcn10_stream_encoder.c @@ -896,10 +896,10 @@ void enc1_stream_encoder_dp_blank( */ REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_DIS_DEFER, 2); /* Larger delay to wait until VBLANK - use max retry of - * 10us*5000=50ms. This covers 41.7ms of minimum 24 Hz mode + + * 10us*10200=102ms. This covers 100.0ms of minimum 10 Hz mode + * a little more because we may not trust delay accuracy. */ - max_retries = DP_BLANK_MAX_RETRY * 250; + max_retries = DP_BLANK_MAX_RETRY * 501; /* disable DP stream */ REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, 0); -- 2.17.1 _______________________________________________ amd-gfx mailing list amd-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/amd-gfx
