From e75e56cc101bd95dca81513d0433f6f86f47e3b7 Mon Sep 17 00:00:00 2001
From: abdoulaye berthe <abdoulaye.berthe@amd.com>
Date: Tue, 12 Nov 2019 11:07:24 -0500
Subject: drm/amd/display: check for repeater when setting aux_rd_interval.
Git-commit: 5fd21b394cfec3611a4ddf49ec61c8920c001899
Patch-mainline: v5.6-rc1
References: jsc#SLE-12680, jsc#SLE-12880, jsc#SLE-12882, jsc#SLE-12883, jsc#SLE-13496, jsc#SLE-15322

[Why]
When training with repeater the aux read interval must be set to
repeater specific aux_red_interval. This value is always 100us for CR.

[How]
Check for repeater when setting the aux_rd_interval in channel
equalization.
Use the right offset in the aux_rd_interval array

Signed-off-by: abdoulaye berthe <abdoulaye.berthe@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: George Shen <George.Shen@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
index 015fa0c52746..dfcd6421ee01 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c
@@ -906,10 +906,10 @@ static enum link_training_result perform_channel_equalization_sequence(
 		/* 3. wait for receiver to lock-on*/
 		wait_time_microsec = lt_settings->eq_pattern_time;
 
-		if (!link->is_lttpr_mode_transparent)
+		if (is_repeater(link, offset))
 			wait_time_microsec =
 					translate_training_aux_read_interval(
-						link->dpcd_caps.lttpr_caps.aux_rd_interval[offset]);
+						link->dpcd_caps.lttpr_caps.aux_rd_interval[offset - 1]);
 
 		wait_for_training_aux_rd_interval(
 				link,
-- 
2.28.0