ALSA: hda - Add snd_hda_get_default_vref() helper function

Add a new helper function to guess the default VREF pin control bits
for mic in.  This can be used to set the pin control value safely
matching with the actual pin capabilities.

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

1 files changed, 2 insertions, 6 deletions

diff --git a/sound/pci/hda/patch_cirrus.c b/sound/pci/hda/patch_cirrus.c
index 778e4b9dd88c..48c6d8186e90 100644
--- a/sound/pci/hda/patch_cirrus.c
+++ b/sound/pci/hda/patch_cirrus.c
@@ -1057,12 +1057,8 @@ static void init_input(struct hda_codec *codec)
                         continue;
                 /* set appropriate pin control and mute first */
                 ctl = PIN_IN;
-                if (cfg->inputs[i].type == AUTO_PIN_MIC) {
-                        unsigned int caps = snd_hda_query_pin_caps(codec, pin);
-                        caps >>= AC_PINCAP_VREF_SHIFT;
-                        if (caps & AC_PINCAP_VREF_80)
-                                ctl = PIN_VREF80;
-                }
+                if (cfg->inputs[i].type == AUTO_PIN_MIC)
+                        ctl |= snd_hda_get_default_vref(codec, pin);
                 snd_hda_set_pin_ctl(codec, pin, ctl);
                 snd_hda_codec_write(codec, spec->adc_nid[i], 0,
                                     AC_VERB_SET_AMP_GAIN_MUTE,