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drm/edid: no CEA v3 extension is not an error

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It is fine for displays without audio functionality to not implement
CEA v3 extension in their EDID. Do not return an error in that case,
instead return 0 as if there was a CEA v3 extension with no audio or
speaker block.

This fixes the second half of bug fdo#107825:
https://bugs.freedesktop.org/show_bug.cgi?id=107825

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Maxime Ripard <maxime.ripard@bootlin.com>
Cc: Sean Paul <sean@poorly.run>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191115170736.7d88593d@endymion
This commit is contained in:
Jean Delvare 2019-11-15 17:07:36 +01:00 committed by Ville Syrjälä
parent 834c43a97f
commit 42908007a6
1 changed files with 4 additions and 4 deletions
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8
drivers/gpu/drm/drm_edid.c
View file

@ -4279,12 +4279,12 @@ int drm_edid_to_sad(struct edid *edid, struct cea_sad **sads)
cea = drm_find_cea_extension(edid);
if (!cea) {
DRM_DEBUG_KMS("SAD: no CEA Extension found\n");
return -ENOENT;
return 0;
}
if (cea_revision(cea) < 3) {
DRM_DEBUG_KMS("SAD: wrong CEA revision\n");
return -EOPNOTSUPP;
return 0;
}
if (cea_db_offsets(cea, &start, &end)) {
@ -4340,12 +4340,12 @@ int drm_edid_to_speaker_allocation(struct edid *edid, u8 **sadb)
cea = drm_find_cea_extension(edid);
if (!cea) {
DRM_DEBUG_KMS("SAD: no CEA Extension found\n");
return -ENOENT;
return 0;
}
if (cea_revision(cea) < 3) {
DRM_DEBUG_KMS("SAD: wrong CEA revision\n");
return -EOPNOTSUPP;
return 0;
}
if (cea_db_offsets(cea, &start, &end)) {