From 3af91bb15093dd2bf53114b74b333458a03de1c8 Mon Sep 17 00:00:00 2001 From: Ken Chalmers Date: Fri, 15 Feb 2019 09:31:52 -0600 Subject: [PATCH] drm/amd/display: Increase DP blank timeout from 30 ms to 50 ms [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 Reviewed-by: Tony Cheng Acked-by: Leo Li Signed-off-by: Alex Deucher --- 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 b082541..d370152 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 @@ -797,10 +797,10 @@ 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*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. */ - max_retries = DP_BLANK_MAX_RETRY * 150; + max_retries = DP_BLANK_MAX_RETRY * 250; /* disable DP stream */ REG_UPDATE(DP_VID_STREAM_CNTL, DP_VID_STREAM_ENABLE, 0); -- 2.7.4