ALSA: hda: VREF powerdown for headphones

Add support for powering down VREF on standard headphone insertion, also
powers up the VREF on a headset insertion.

Signed-off-by: Matthew Ranostay <mranostay@embeddedalley.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

1 files changed, 22 insertions, 1 deletions

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 5c65f7d4606f..c461baa83c2a 100644
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -38,6 +38,7 @@
 #define NUM_CONTROL_ALLOC       32
 #define STAC_PWR_EVENT          0x20
 #define STAC_HP_EVENT           0x30
+#define STAC_VREF_EVENT         0x40
 
 enum {
         STAC_REF,
@@ -3854,13 +3855,22 @@ static void stac92xx_unsol_event(struct hda_codec *codec, unsigned int res)
         struct sigmatel_spec *spec = codec->spec;
         int idx = res >> 26 & 0x0f;
 
-        switch ((res >> 26) & 0x30) {
+        switch ((res >> 26) & 0x70) {
         case STAC_HP_EVENT:
                 stac92xx_hp_detect(codec, res);
                 /* fallthru */
         case STAC_PWR_EVENT:
                 if (spec->num_pwrs > 0)
                         stac92xx_pin_sense(codec, idx);
+                break;
+        case STAC_VREF_EVENT: {
+                int data = snd_hda_codec_read(codec, codec->afg, 0,
+                        AC_VERB_GET_GPIO_DATA, 0);
+                /* toggle VREF state based on GPIOx status */
+                snd_hda_codec_write(codec, codec->afg, 0, 0x7e0,
+                        !!(data & (1 << idx)));
+                break;
+                }
         }
 }
 
@@ -4360,6 +4370,17 @@ again:
                 codec->slave_dig_outs = stac92hd71bxx_slave_dig_outs;
                 break;
         case 0x111d7608: /* 5 Port with Analog Mixer */
+                switch (codec->subsystem_id) {
+                case 0x103c361a:
+                        /* Enable VREF power saving on GPIO1 detect */
+                        snd_hda_codec_write(codec, codec->afg, 0,
+                                AC_VERB_SET_GPIO_UNSOLICITED_RSP_MASK, 0x02);
+                        snd_hda_codec_write_cache(codec, codec->afg, 0,
+                                        AC_VERB_SET_UNSOLICITED_ENABLE,
+                                        (AC_USRSP_EN | STAC_VREF_EVENT | 0x01));
+                        spec->gpio_mask |= 0x02;
+                        break;
+                }
                 if ((codec->revision_id & 0xf) == 0 ||
                                 (codec->revision_id & 0xf) == 1) {
 #ifdef SND_HDA_NEEDS_RESUME