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

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[ Upstream commit 5ceaebcda9 ]

[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>
This commit is contained in:
Mustapha Ghaddar 2021-11-15 17:56:42 -05:00 • committed by Greg Kroah-Hartman
commit dd3cea3425
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/dc/core/dc_resource.c
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@ -1698,6 +1698,10 @@ 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;
}