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ALSA: hda - Add the generic Headphone Mic feature

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This patch improves the generic parser code to allow to set up the
headphone jack as a mic input.  User can enable this feature by giving
hp_mic hint string.

The former shared hp/mic feature for the single built-in mic is still
retained.  This detection can be disabled now via hp_mic_detect hint
string, too.

Signed-off-by: Takashi Iwai <[email protected]>
This commit is contained in:
Takashi Iwai 2013-02-19 17:12:42 +01:00
commit 967303dabc
3 changed files with 97 additions and 55 deletions
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3
Documentation/sound/alsa/HD-Audio.txt
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@ -466,6 +466,9 @@ The generic parser supports the following hints:
- add_in_jack_modes (bool): add "xxx Jack Mode" enum controls to each
input jack for allowing to change the mic bias vref
- power_down_unused (bool): power down the unused widgets
- add_hp_mic (bool): add the headphone to capture source if possible
- hp_mic_detect (bool): enable/disable the hp/mic shared input for a
single built-in mic case; default true
- mixer_nid (int): specifies the widget NID of the analog-loopback
mixer