From: Wenjing Liu <Wenjing.Liu@amd.com>
Date: Mon, 21 Aug 2017 16:43:08 -0400
Subject: drm/amd/display: retry LT on failing LT in automated request
Git-commit: c25e2d1f8ff403fdb7a82a025ae492d167bbdb99
Patch-mainline: v4.15-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
[Description]
Link training is not retried in automated link training request.
In case link training is occasionally failing, there is not way to retry
so the requested lane settings will not set.
Signed-off-by: Wenjing Liu <Wenjing.Liu@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
@@ -299,10 +299,11 @@ void dp_retrain_link_dp_test(struct dc_l
dp_receiver_power_ctrl(link, true);
- dc_link_dp_perform_link_training(
+ perform_link_training_with_retries(
link,
link_setting,
- skip_video_pattern);
+ skip_video_pattern,
+ LINK_TRAINING_ATTEMPTS);
link->cur_link_settings = *link_setting;