At Tue, 1 Sep 2009 14:59:13 +0200,
Jure Koren wrote:
>
> Hi!
>
> I've received a Vaio P netbook recently, which contains an ALC262 of an
> unknown model. Playback generally works out of the box, but I haven't yet
> managed to raise the capture level for the internal microphone (though it's
> easy to rev up the passthrough channel which makes a nice white noise without
> any feedback).
>
> What I'd like to know is how difficult would it be for me to actually get test
> out more channels than are available with any particular model= parameter
> setting. Some other chipsets include model=test or model=debug, but not this
> one. Also, is there a tool that could help me probe around the chipset to
> properly identify available mixer channels?
You can reassign pins via sysfs and let the driver reconfigure.
See $LINUX/Documentation/sound/alsa/HD-Audio.txt for details. The
latest version is found at below, too:
http://ftp.kernel.org/pub/linux/kernel/people/tiwai/docs/
But, I guess there is no any other channels (if you are speaking about
PCM). ALC262 barely supports multi channels. Or, if you are looking
for other active I/O pins, then you can poke with hda-verb, too.
Takashi
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