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>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index 5c65f7d4606faa92077426d6405d6ee62434b107..c461baa83c2a9ead2c669bc86460215340bbe4aa 100644 (file)
--- 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