[alsa-devel] [RFC] [PATCH] ASoC: OMAP: full duplex mode fix

Janusz Krzysztofik jkrzyszt at tis.icnet.pl
Wed Aug 5 15:26:47 CEST 2009

Jarkko Nikula wrote:
> On Wed, 5 Aug 2009 10:21:49 +0300
> Jarkko Nikula <jhnikula at gmail.com> wrote:
>>> If my analysis is correct, the best solution I can see would be starting McBSP 
>>> transfer for one direction only, not both, so the opposite direction can be 
>>> started when needed. That requires deeper and wider OMAP knowledge and a 
>>> change in omap_mcbsp_start() API though. I am not in a position to deal with 
>>> this myself, I'm afraid.
>> I favor this change. Actually I remember I was thinking shortly to
>> change API of omap_mcbsp_start and _stop more than year back or so but
>> didn't find it necessary back then.
>> I think change will be trivial. Basically two new arguments indicating
>> are the TX/RX active and let the first/last caller to deal with
>> sample-rate generator and frame sync activation/de-activation.
> I hacked a patch below. Can you test does it help?

Will do tonight (CET).

Now seeing how easy it was (for you ;), I think I could try to follow 
that way an modify omap_mcbsp_config() in the same spirit, if you find 
it of any use.


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