Commit 8fc2f28e authored Nov 15, 2021 by Mustapha Ghaddar Committed by Greg Kroah-Hartman Dec 17, 2021

drm/amd/display: Fix for the no Audio bug with Tiled Displays



[ Upstream commit 5ceaebcda9061c04f439c93961f0819878365c0f ]

[WHY]
It seems like after a series of plug/unplugs we end up in a situation
where tiled display doesnt support Audio.

[HOW]
The issue seems to be related to when we check streams changed after an
HPD, we should be checking the audio_struct as well to see if any of its
values changed.

Reviewed-by: Jun Lei <Jun.Lei@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Mustapha Ghaddar <mustapha.ghaddar@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

parent c0315e93

drivers/gpu/drm/amd/display/dc/core/dc_resource.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -1546,6 +1546,10 @@ bool dc_is_stream_unchanged(
		if (old_stream->ignore_msa_timing_param != stream->ignore_msa_timing_param)
		return false;

		// Only Have Audio left to check whether it is same or not. This is a corner case for Tiled sinks
		if (old_stream->audio_info.mode_count != stream->audio_info.mode_count)
		return false;

		return true;
		}