[alsa-devel] Connecting two Codecs to the same CPU DAI

Daniel Mack zonque at gmail.com
Tue Jul 16 18:33:39 CEST 2013

On 16.07.2013 18:20, Mark Brown wrote:
> On Tue, Jul 16, 2013 at 04:31:01PM +0200, Daniel Mack wrote:
>> This is cumbersome of course, and I wonder how the core could be
>> augmented in order to handle such cases correctly. Ideally, it should
>> only expose one PCM interface and handle a list of Codecs in the back.
>> Or am I unaware of an existing feature?
> No, no feature here.  Off the top of my head I'd suggest soc-pcm plus a
> virtual DAI for the second link.

That would still require userspace to open and configure both
subdevices, right?

Do you think it's a good idea to teach DAI links support for more than
one codec? At a glance, it seems quite possible: the modes and rates
would be limited down to the intersection of those of each codec, and
the PCM callbacks would be relayed to all codecs in the list.


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