drm/i915: Add audio pin sense / ELD callback
drm/i915: Add audio pin sense / ELD callback

This callback will be called by the i915 driver to notify the hda
driver that its HDMI information needs to be refreshed, i e,
that audio output is now available (or unavailable) - usually as a
result of a monitor being plugged in (or unplugged).

Signed-off-by: David Henningsson <9fb354e0a5603a0331399c18f4aa5aab2f9d9c5b@canonical.com>
Reviewed-by: Jani Nikula <ba783f3beccaedfda693f41a15407d612a629408@intel.com>
Acked-by: Daniel Vetter <3d0f3b9ddcacec30c4008c5e030e6c13a478cb4f@ffwll.ch>
Signed-off-by: Takashi Iwai <4596b3305151c7ee743192a95d394341e3d3b644@suse.de>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs