Commit 705bec3e authored by Jani Nikula's avatar Jani Nikula
Browse files

drm/edid: detect basic audio in all CEA extensions 



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: default avatarJani Nikula <jani.nikula@intel.com>
Reviewed-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/59481d0397de4b91b3e6ea665882334e92538f40.1651569697.git.jani.nikula@intel.com
parent 49a62a29

drivers/gpu/drm/drm_edid.c

+10 −6
Original line number Diff line number Diff line
@@ -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");