| From 328db4fdfb5f617513e3fa55c03ab3cdb0269d6f Mon Sep 17 00:00:00 2001 |
| From: Sasha Levin <sashal@kernel.org> |
| Date: Mon, 15 Nov 2021 17:56:42 -0500 |
| Subject: drm/amd/display: Fix for the no Audio bug with Tiled Displays |
| |
| From: Mustapha Ghaddar <mghaddar@amd.com> |
| |
| [ 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> |
| --- |
| drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 ++++ |
| 1 file changed, 4 insertions(+) |
| |
| 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 f25ac17f47fa9..95a5310e9e661 100644 |
| --- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c |
| +++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c |
| @@ -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; |
| } |
| |
| -- |
| 2.33.0 |
| |
