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ALSA: hda - Add snd_hda_get_default_vref() helper function

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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>
This commit is contained in:
Takashi Iwai 2012-04-20 13:06:53 +02:00
commit 4740860b53
10 changed files with 56 additions and 58 deletions
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