[alsa-devel] Store codec capabilites in alsa

Patrick Lai plai at codeaurora.org
Mon Oct 29 02:13:08 CET 2012

On 10/26/2012 3:45 AM, Liam Girdwood wrote:
Hi Liam,

> The codec DAI driver does register some of it's capabilities with the core.
The CODEC Bharath and I are working with has hardware providing 
information back to CPU so post processing modules running on CPU can 
fine tune things on the CODEC continuously.

So, the information need to exposed to CPU is more than supported rates, 
format, and channels but very CODEC specific.

I doubt that ASoC has mechanism for vendor's own CODEC driver to 
advertise CODEC specific information. However, we would like to check 
ahead of time before coming up with something on our own.


>> The BE CPU dai driver can then read the capabilities of the codec and talk
>> to the DSP.
> You should be able to do this by looking at the RTD codec->driver pointer to get supported rates, formats and channels.
> Regards
> Liam
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