1 files changed, 18 insertions, 0 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index b34d78b88a85..61996a2f45df 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -4413,6 +4413,24 @@ static void stac92xx_unsol_event(struct hda_codec *codec, unsigned int res)
                 if (spec->num_pwrs > 0)
                         stac92xx_pin_sense(codec, event->nid);
                 stac92xx_report_jack(codec, event->nid);
+
+                switch (codec->subsystem_id) {
+                case 0x103c308f:
+                        if (event->nid == 0xb) {
+                                int pin = AC_PINCTL_IN_EN;
+
+                                if (get_pin_presence(codec, 0xa)
+                                                && get_pin_presence(codec, 0xb))
+                                        pin |= AC_PINCTL_VREF_80;
+                                if (!get_pin_presence(codec, 0xb))
+                                        pin |= AC_PINCTL_VREF_80;
+
+                                /* toggle VREF state based on mic + hp pin
+                                 * status
+                                 */
+                                stac92xx_auto_set_pinctl(codec, 0x0a, pin);
+                        }
+                }
                 break;
         case STAC_VREF_EVENT:
                 data = snd_hda_codec_read(codec, codec->afg, 0,