diff options
Diffstat (limited to 'sound/pci/hda/hda_codec.c')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 841475cc13b6..393a3043a46e 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -4795,6 +4795,59 @@ int snd_hda_multi_out_analog_cleanup(struct hda_codec *codec, } EXPORT_SYMBOL_HDA(snd_hda_multi_out_analog_cleanup); +/** + * snd_hda_get_default_vref - Get the default (mic) VREF pin bits + * + * Guess the suitable VREF pin bits to be set as the pin-control value. + * Note: the function doesn't set the AC_PINCTL_IN_EN bit. + */ +unsigned int snd_hda_get_default_vref(struct hda_codec *codec, hda_nid_t pin) +{ + unsigned int pincap; + unsigned int oldval; + oldval = snd_hda_codec_read(codec, pin, 0, + AC_VERB_GET_PIN_WIDGET_CONTROL, 0); + pincap = snd_hda_query_pin_caps(codec, pin); + pincap = (pincap & AC_PINCAP_VREF) >> AC_PINCAP_VREF_SHIFT; + /* Exception: if the default pin setup is vref50, we give it priority */ + if ((pincap & AC_PINCAP_VREF_80) && oldval != PIN_VREF50) + return AC_PINCTL_VREF_80; + else if (pincap & AC_PINCAP_VREF_50) + return AC_PINCTL_VREF_50; + else if (pincap & AC_PINCAP_VREF_100) + return AC_PINCTL_VREF_100; + else if (pincap & AC_PINCAP_VREF_GRD) + return AC_PINCTL_VREF_GRD; + return AC_PINCTL_VREF_HIZ; +} +EXPORT_SYMBOL_HDA(snd_hda_get_default_vref); + +int _snd_hda_set_pin_ctl(struct hda_codec *codec, hda_nid_t pin, + unsigned int val, bool cached) +{ + if (val) { + unsigned int cap = snd_hda_query_pin_caps(codec, pin); + if (cap && (val & AC_PINCTL_OUT_EN)) { + if (!(cap & AC_PINCAP_OUT)) + val &= ~(AC_PINCTL_OUT_EN | AC_PINCTL_HP_EN); + else if ((val & AC_PINCTL_HP_EN) && + !(cap & AC_PINCAP_HP_DRV)) + val &= ~AC_PINCTL_HP_EN; + } + if (cap && (val & AC_PINCTL_IN_EN)) { + if (!(cap & AC_PINCAP_IN)) + val &= ~(AC_PINCTL_IN_EN | AC_PINCTL_VREFEN); + } + } + if (cached) + return snd_hda_codec_update_cache(codec, pin, 0, + AC_VERB_SET_PIN_WIDGET_CONTROL, val); + else + return snd_hda_codec_write(codec, pin, 0, + AC_VERB_SET_PIN_WIDGET_CONTROL, val); +} +EXPORT_SYMBOL_HDA(_snd_hda_set_pin_ctl); + /* * Helper for automatic pin configuration */ |