drivers/gpu/drm/bridge/lontium-lt9611uxc.c:438:undefined reference to `drm_connector_hdmi_audio_plugged_notify'

drivers/gpu/drm/bridge/lontium-lt9611uxc.c:438:undefined reference to `drm_connector_hdmi_audio_plugged_notify'

[kernel test robot]

Hi Dmitry,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9a9c8ce300cd3859cc87b408ef552cd697cc2ab7
commit: c08c123d4cd6ec3ee482d607e29388d0db2d3f1d drm/bridge: lontium-lt9611uxc: switch to HDMI audio helpers
date:   4 months ago
config: x86_64-randconfig-004-20260410 (https://download.01.org/0day-ci/archive/20260410/202604101732.SBQWKwtT-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260410/202604101732.SBQWKwtT-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Fixes: c08c123d4cd6 ("drm/bridge: lontium-lt9611uxc: switch to HDMI audio helpers")
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202604101732.SBQWKwtT-lkp@intel.com/

All errors (new ones prefixed by >>):

   ld: vmlinux.o: in function `lt9611uxc_bridge_hpd_notify':
>> drivers/gpu/drm/bridge/lontium-lt9611uxc.c:438:(.text+0xd9d6cb): undefined reference to `drm_connector_hdmi_audio_plugged_notify'
>> ld: drivers/gpu/drm/bridge/lontium-lt9611uxc.c:448:(.text+0xd9d70a): undefined reference to `drm_connector_hdmi_audio_plugged_notify'


vim +438 drivers/gpu/drm/bridge/lontium-lt9611uxc.c

   430	
   431	static void lt9611uxc_bridge_hpd_notify(struct drm_bridge *bridge,
   432						struct drm_connector *connector,
   433						enum drm_connector_status status)
   434	{
   435		const struct drm_edid *drm_edid;
   436	
   437		if (status == connector_status_disconnected) {
 > 438			drm_connector_hdmi_audio_plugged_notify(connector, false);
   439			drm_edid_connector_update(connector, NULL);
   440			return;
   441		}
   442	
   443		drm_edid = lt9611uxc_bridge_edid_read(bridge, connector);
   444		drm_edid_connector_update(connector, drm_edid);
   445		drm_edid_free(drm_edid);
   446	
   447		if (status == connector_status_connected)
 > 448			drm_connector_hdmi_audio_plugged_notify(connector, true);
   449	}
   450	

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https://github.com/intel/lkp-tests/wiki