Wednesday 05 August 2009 10:42:54 Jarkko Nikula wrote:

On Wed, 5 Aug 2009 10:21:49 +0300 Jarkko Nikula <jhnikula@gmail.com> wrote:

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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?

Yes, it does. Works as expected in all possible combinations I have tried: start recording while playing, start playing while recording, start recording and playing simultaneously. Thanks. Tested-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>