sound: virtuoso: add headphone impedance control

Add a mixer control to adjust the headphone amplifier output for
headphones with different impedances.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Clemens Ladisch 2009-09-28 11:19:19 +02:00 • committed by Takashi Iwai
commit a361e247b4