[alsa-devel] Alsa soc UDA1380 - no duplex

[Jarek]

Dnia 2012-04-03, wto o godzinie 18:09 +0300, Vasily Khoruzhick pisze:

> Probably it's lpc313x limitation (CPU DAI does not support duplex?)

Do you know how to check if this is hardware limitation ? I have
reviewed documentation and from my point of view it should work.
http://ics.nxp.com/products/lpc3000/datasheet/lpc3130.lpc3131.pdf

> Anyway, looks like its code is not upstreamed.

Yes, I didn't notice before, that all code comes from this patch (for
kernel 3.2):

http://www.lpclinux.com/pub/Forums/ForumLPC313x0055/lpc.tar.gz
> 
> >        The other question is why there are two drivers to the same device.
> 
> AFAIK there's only one driver for uda1380 codec.

I've found separete folders for samsung and lpc in sound/soc/ and I
suspected that there are two separate drivers. As I understand now,
there is only separate intermediary layer. The files in those folders
are quite different, so I don't know how to compare them, to find the
difference.
In mean time. I have received the following respone from lpclinux:
=====
As I understand,it is the SW limitation limitation because of which we
can not use playback & capture feature simultaneously. The audio driver
code is based on ALSA framework available in sound/soc/lpc313x. Please
give it a try & let us know about the results
=====
I'll be glad, if can take a look at this code.
 or just give me some direction.