From: Calvin Hou <Calvin.Hou@amd.com>
Date: Wed, 7 Apr 2021 19:07:45 +0000 (-0400)
Subject: drm/amd/display: remove checking sink in is_timing_changed
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=70c14a1d7ee4d25d2024967979c8ba618849af54;p=linux.git

drm/amd/display: remove checking sink in is_timing_changed

[Why]
Sometimes, such as sleep wake, the link->local sink pointer changed,
but the dc_stream_state->sink pointer is not changed. The checking
of timing_changed reports wrong result, lead to link tear down
unexpected wrongly.

[How]
SST compare local sink, MST compare proper remote link.

Signed-off-by: Calvin Hou <Calvin.Hou@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Wayne Lin <Wayne.Lin@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 8cb937c046aa0..9fb0930f977bc 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1706,12 +1706,6 @@ static bool is_timing_changed(struct dc_stream_state *cur_stream,
 	if (cur_stream == NULL)
 		return true;
 
-	/* If sink pointer changed, it means this is a hotplug, we should do
-	 * full hw setting.
-	 */
-	if (cur_stream->sink != new_stream->sink)
-		return true;
-
 	/* If output color space is changed, need to reprogram info frames */
 	if (cur_stream->output_color_space != new_stream->output_color_space)
 		return true;