From 854d5faa50b76aa63c73d6d936fb0bbd248ed9ec Mon Sep 17 00:00:00 2001
From: Fangzhi Zuo <Jerry.Zuo@amd.com>
Date: Wed, 9 Feb 2022 16:43:45 -0500
Subject: drm/amd/display: Ignore Transitional Invalid Link Rate Error Message
Git-commit: 9ff28ab43af4cd9f1771779b502cac1bd0aa4264
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

[Why]
When hotplug or unplug happens, each stream disabled one by one, and then
enable any alived streams. Link phy and payload table is cleared when 1st
stream is disabled. That causes the error message pops up when disable 2nd
stream. There is no active stream after link_rate is cleared.
After all streams are disabled, link will be trained again and link rate is
assigned to any alived streams.

Therefore there is no harm for the error message that represents invalid
link rate value in the atomic reset transitional time period.

[How]
Downgrade the log level from ERROR to DEBUG.

Reviewed-by: Wayne Lin <Wayne.Lin@amd.com>
Acked-by: Solomon Chiu <solomon.chiu@amd.com>
Signed-off-by: Fangzhi Zuo <Jerry.Zuo@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/display/dc/core/dc_link.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_link.c b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
index 80c04ff5a764..e0d4d67f9314 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_link.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_link.c
@@ -3928,7 +3928,7 @@ static enum dc_status deallocate_mst_payload(struct pipe_ctx *pipe_ctx)
 				&link->mst_stream_alloc_table);
 		break;
 	case DP_UNKNOWN_ENCODING:
-		DC_LOG_ERROR("Failure: unknown encoding format\n");
+		DC_LOG_DEBUG("Unknown encoding format\n");
 		return DC_ERROR_UNEXPECTED;
 	}
 
-- 
2.38.1