[alsa-devel] Channel swapping issue on TI OMAP3/TWL4030
peter.ujfalusi at nokia.com
Wed Feb 16 08:20:21 CET 2011
On 02/15/11 18:23, ext ylin at mail.com wrote:
>> I forgot to ask:
>> what mode you are using the McBSP?
>> Is it in element, or threshold mode?
>> You can check/change the McBSP mode in:
> It is in threshold mode, with max threshold 1023. I will try other
This sounds safe, give the fact that the McBSP2 FIFO is 1280 word long.
The McBSP FIFO configuration has been corrected in newer kernels.
One thing that I would try is to synchronize the McBSP2 FIFO
configuration with the period size you use:
48KHz/stereo/16bit 10ms = 480 samples,
so configure the McBSP2 FIFO to 960 (for both tx, and rx threshold).
Might not help, but it worth a try...
>>> For playing, the left and right are the same data, we could not
> tell if
>>> the channel switch happens to playback as well.
>> I see. Is there a way for you to run your application to capture only,
>> and from a separate app (aplay?) play a sample, which has audio only
>> one channel?
> I can fill zero to one of the play channel in our app to test it.
Let's see, if the swap also happens in the playback path as well.
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