AC_VERB_GET_VOLUME_KNOB_CONTROL  346 sound/pci/hda/hda_proc.c 				 AC_VERB_GET_VOLUME_KNOB_CONTROL, 0);
AC_VERB_GET_VOLUME_KNOB_CONTROL 1990 sound/pci/hda/patch_realtek.c 				     AC_VERB_GET_VOLUME_KNOB_CONTROL, 0);