[alsa-devel] Where is simple mixer control "Surround" defined for ac97 or via82xx? I cant find it anywhere in ac97....

[John L. Utz III]

Tnx Clemens!

On Fri, 10 Aug 2007 09:33:46 +0200
"Clemens Ladisch" <cladisch at fastmail.net> wrote:

> John L. Utz III wrote:
> > amixer controls | grep Surround
> > numid=20,iface=MIXER,name='Surround Playback Switch'
> > numid=21,iface=MIXER,name='Surround Playback Volume'
> > 
> > But for the life of me, i cant find the code that implements it!
> 
> Around line 1350 in ac97_codec.c:
> 
> 	/* build surround controls */
> 	if ((snd_ac97_try_volume_mix(ac97, AC97_SURROUND_MASTER))
> 		&& !(ac97->flags & AC97_AD_MULTI)) {
> 		/* Surround Master (0x38) is with stereo mutes */
> 		if ((err = snd_ac97_cmix_new_stereo(card, "Surround
> Playback", AC97_SURROUND_MASTER, 1, 0,
> 						    ac97)) < 0)
> 			return err;
> 	}
> 
> HTH

It does, i think that i'll try to use snd_ac97_rename_vol_ctl() in
patch_vt1618() to make Surround the Rear control.

Hopefully, i'll have a usable patch to submit for vt1618 next week,
woohoo!

> Clemens
>