[ALSA] hda-codec - Fix VREF level of Mic inputs on STAC92xx codecs

Fixed VREF level of Mic inputs on STAC92xx codecs (ALSA bug#1953).

Signed-off-by: Takashi Iwai <tiwai@suse.de>

diff --git a/sound/pci/hda/patch_sigmatel.c b/sound/pci/hda/patch_sigmatel.c
index b56ca4019392254801fefffa2818e1e9cbd5af0e..e5fdb64eb02c5ec6f61d1792d7dbf6934eac1555 100644 (file)
--- a/sound/pci/hda/patch_sigmatel.c
+++ b/sound/pci/hda/patch_sigmatel.c
@@ -534,6 +534,22 @@ static int stac92xx_build_pcms(struct hda_codec *codec)
        return 0;
 }
 
+static unsigned int stac92xx_get_vref(struct hda_codec *codec, hda_nid_t nid)
+{
+       unsigned int pincap = snd_hda_param_read(codec, nid,
+                                                AC_PAR_PIN_CAP);
+       pincap = (pincap & AC_PINCAP_VREF) >> AC_PINCAP_VREF_SHIFT;
+       if (pincap & AC_PINCAP_VREF_100)
+               return AC_PINCTL_VREF_100;
+       if (pincap & AC_PINCAP_VREF_80)
+               return AC_PINCTL_VREF_80;
+       if (pincap & AC_PINCAP_VREF_50)
+               return AC_PINCTL_VREF_50;
+       if (pincap & AC_PINCAP_VREF_GRD)
+               return AC_PINCTL_VREF_GRD;
+       return 0;
+}
+
 static void stac92xx_auto_set_pinctl(struct hda_codec *codec, hda_nid_t nid, int pin_type)
 
 {
@@ -571,9 +587,12 @@ static int stac92xx_io_switch_put(struct snd_kcontrol *kcontrol, struct snd_ctl_
 
        if (val)
                stac92xx_auto_set_pinctl(codec, nid, AC_PINCTL_OUT_EN);
-       else
-               stac92xx_auto_set_pinctl(codec, nid, AC_PINCTL_IN_EN);
-
+       else {
+               unsigned int pinctl = AC_PINCTL_IN_EN;
+               if (io_idx) /* set VREF for mic */
+                       pinctl |= stac92xx_get_vref(codec, nid);
+               stac92xx_auto_set_pinctl(codec, nid, pinctl);
+       }
         return 1;
 }
 
@@ -951,9 +970,13 @@ static int stac92xx_init(struct hda_codec *codec)
                stac92xx_auto_init_hp_out(codec);
        }
        for (i = 0; i < AUTO_PIN_LAST; i++) {
-               if (cfg->input_pins[i])
-                       stac92xx_auto_set_pinctl(codec, cfg->input_pins[i],
-                                                AC_PINCTL_IN_EN);
+               hda_nid_t nid = cfg->input_pins[i];
+               if (nid) {
+                       unsigned int pinctl = AC_PINCTL_IN_EN;
+                       if (i == AUTO_PIN_MIC || i == AUTO_PIN_FRONT_MIC)
+                               pinctl |= stac92xx_get_vref(codec, nid);
+                       stac92xx_auto_set_pinctl(codec, nid, pinctl);
+               }
        }
        if (cfg->dig_out_pin)
                stac92xx_auto_set_pinctl(codec, cfg->dig_out_pin,