This is a note to let you know that I've just added the patch titled
drm/edid: check basic audio support on CEA extension block
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-edid-check-basic-audio-support-on-cea-extension-block.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <sta...@vger.kernel.org> know about it.
>From 5662abf6e21338be6d085d6375d3732ac6147fd2 Mon Sep 17 00:00:00 2001
From: Cooper Chiou <cooper.ch...@intel.com>
Date: Thu, 24 Mar 2022 14:12:18 +0800
Subject: drm/edid: check basic audio support on CEA extension block
From: Cooper Chiou <cooper.ch...@intel.com>
commit 5662abf6e21338be6d085d6375d3732ac6147fd2 upstream.
Tag code stored in bit7:5 for CTA block byte[3] is not the same as
CEA extension block definition. Only check CEA block has
basic audio support.
v3: update commit message.
Cc: sta...@vger.kernel.org
Cc: Jani Nikula <jani.nik...@intel.com>
Cc: Shawn C Lee <shawn.c....@intel.com>
Cc: intel-gfx <intel-gfx@lists.freedesktop.org>
Signed-off-by: Cooper Chiou <cooper.ch...@intel.com>
Signed-off-by: Lee Shawn C <shawn.c....@intel.com>
Fixes: e28ad544f462 ("drm/edid: parse CEA blocks embedded in DisplayID")
Reviewed-by: Jani Nikula <jani.nik...@intel.com>
Signed-off-by: Jani Nikula <jani.nik...@intel.com>
Link:
https://patchwork.freedesktop.org/patch/msgid/20220324061218.32739-1-shawn.c....@intel.com
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/gpu/drm/drm_edid.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -4776,7 +4776,8 @@ bool drm_detect_monitor_audio(struct edi
if (!edid_ext)
goto end;
- has_audio = ((edid_ext[3] & EDID_BASIC_AUDIO) != 0);
+ has_audio = (edid_ext[0] == CEA_EXT &&
+ (edid_ext[3] & EDID_BASIC_AUDIO) != 0);
if (has_audio) {
DRM_DEBUG_KMS("Monitor has basic audio support\n");
Patches currently in stable-queue which might be from cooper.ch...@intel.com are
queue-5.15/drm-edid-check-basic-audio-support-on-cea-extension-block.patch
