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From dbd4525530fa2a01988823bc9c92e5e0fadce252 Mon Sep 17 00:00:00 2001
From: Ken Chalmers <ken.chalmers@amd.com>
Date: Fri, 15 Feb 2019 09:31:52 -0600
Subject: [PATCH 1588/2940] 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 <ken.chalmers@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
---
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 b08254121251..d370152018f8 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);
--
2.17.1
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