linux-kernel - [PATCH AUTOSEL 5.15 06/41] drm/amd/display: fix audio format not updated after edid updated

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Message-Id: <20220412004656.350101-6-sashal@kernel.org>
Date:   Mon, 11 Apr 2022 20:46:18 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Charlene Liu <Charlene.Liu@....com>,
        Alvin Lee <Alvin.Lee2@....com>, Aric Cyr <Aric.Cyr@....com>,
        Alex Hung <alex.hung@....com>,
        Daniel Wheeler <daniel.wheeler@....com>,
        Alex Deucher <alexander.deucher@....com>,
        Sasha Levin <sashal@...nel.org>, harry.wentland@....com,
        sunpeng.li@....com, Rodrigo.Siqueira@....com,
        christian.koenig@....com, Xinhui.Pan@....com, airlied@...ux.ie,
        daniel@...ll.ch, Jun.Lei@....com, aric.cyr@....com,
        Jimmy.Kizito@....com, wenjing.liu@....com,
        nicholas.kazlauskas@....com, mario.kleiner.de@...il.com,
        Dmytro.Laktyushkin@....com, Jerry.Zuo@....com,
        meenakshikumar.somasundaram@....com, eric.bernstein@....com,
        Martin.Leung@....com, amd-gfx@...ts.freedesktop.org,
        dri-devel@...ts.freedesktop.org
Subject: [PATCH AUTOSEL 5.15 06/41] drm/amd/display: fix audio format not updated after edid updated

From: Charlene Liu <Charlene.Liu@....com>

[ Upstream commit 5e8a71cf13bc9184fee915b2220be71b4c6cac74 ]

[why]
for the case edid change only changed audio format.
driver still need to update stream.

Reviewed-by: Alvin Lee <Alvin.Lee2@....com>
Reviewed-by: Aric Cyr <Aric.Cyr@....com>
Acked-by: Alex Hung <alex.hung@....com>
Signed-off-by: Charlene Liu <Charlene.Liu@....com>
Tested-by: Daniel Wheeler <daniel.wheeler@....com>
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/gpu/drm/amd/display/dc/core/dc_resource.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

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 7ae409f7dcf8..8c285d585249 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1623,8 +1623,8 @@ 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)
+	/*compare audio info*/
+	if (memcmp(&old_stream->audio_info, &stream->audio_info, sizeof(stream->audio_info)) != 0)
 		return false;
 
 	return true;
-- 
2.35.1