From b131932215c993ea5adf8192d1de2e8d6b23048d Mon Sep 17 00:00:00 2001
From: Jing Zhou <Jing.Zhou@amd.com>
Date: Thu, 22 Aug 2019 14:26:33 +0800
Subject: [PATCH] drm/amd/display: verify stream link before link test
Git-commit: b131932215c993ea5adf8192d1de2e8d6b23048d
Patch-mainline: v5.5-rc1
References: git-fixes
[Why]
DP1.2 LL CTS test failure.
[How]
The failure is caused by not verify stream link is equal
to link, only check stream and link is not null.
Signed-off-by: Jing Zhou <Jing.Zhou@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link_hwss.c
@@ -312,7 +312,8 @@ void dp_retrain_link_dp_test(struct dc_l
if (pipes[i].stream != NULL &&
!pipes[i].top_pipe &&
pipes[i].stream->link != NULL &&
- pipes[i].stream_res.stream_enc != NULL) {
+ pipes[i].stream_res.stream_enc != NULL &&
+ pipes[i].stream->link == link) {
udelay(100);
pipes[i].stream_res.stream_enc->funcs->dp_blank(