On Mon, Aug 19, 2019 at 04:45:14PM +0100, Mark Brown wrote:
> On Mon, Aug 19, 2019 at 10:41:41AM +0200, Maxime Ripard wrote:
> > On Wed, Aug 14, 2019 at 05:02:34PM +0100, Mark Brown wrote:
>
> > > OK, in that case I'd recommend providing them to userspace as a single
> > > four channel stream - keeping everything bundled together as long as
> > > possible to make it easier to keep the processing synced up.
>
> > Ok, that's what I had in mind as well :)
>
> > However, it looks like we can only capture as many channels as the max
> > being exposed by the codec on the link?
>
> > Any attempt at capturing something with 4 channels here using arecord
> > was either reduced to two channels (the amount of channels provided by
> > the adau7002 driver), or just refused by the ALSA core.
>
> > Is there anything that we need to configure / work on to enable this?
>
> I'd expect there's some issue in the capability/constraint matching code
> that needs fixing - that should work but I can totally see it not
> working unless someone goes in and does something to fix it.

Ok, I'll have a look, thanks!
Maxime


--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com