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drm/edid: detect basic audio in all CEA extensions

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Convert drm_find_cea_extension() to EDID block iterator in basic audio
detection. Detect basic audio in all CEA extensions.

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/59481d0397de4b91b3e6ea665882334e92538f40.1651569697.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula
2022-05-03 12:24:02 +03:00
parent 49a62a2923
commit 705bec3eca
1 changed files with 10 additions and 6 deletions
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16
drivers/gpu/drm/drm_edid.c
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@@ -5112,17 +5112,21 @@ EXPORT_SYMBOL(drm_detect_hdmi_monitor);
*/
bool drm_detect_monitor_audio(const struct edid *edid)
{
struct drm_edid_iter edid_iter;
const struct cea_db *db;
struct cea_db_iter iter;
const u8 *edid_ext;
bool has_audio = false;
edid_ext = drm_find_cea_extension(edid);
if (!edid_ext)
goto end;
has_audio = (edid_ext[0] == CEA_EXT &&
(edid_ext[3] & EDID_BASIC_AUDIO) != 0);
drm_edid_iter_begin(edid, &edid_iter);
drm_edid_iter_for_each(edid_ext, &edid_iter) {
if (edid_ext[0] == CEA_EXT) {
has_audio = edid_ext[3] & EDID_BASIC_AUDIO;
if (has_audio)
break;
}
}
drm_edid_iter_end(&edid_iter);
if (has_audio) {
DRM_DEBUG_KMS("Monitor has basic audio support\n");