[alsa-devel] [PATCH v2] davinci-mcasp: Add support for multichannel playback

Michal Bachraty michal.bachraty at streamunlimited.com
Tue Mar 5 13:24:05 CET 2013

On Tuesday, March 05, 2013 12:03:45 Bedia, Vaibhav wrote:
> I just had a look at it and most the comments that I have on v2 are still
> applicable and IMO need to be addressed before getting merged. You also
> don't have a change-log in v3 so I don't understand why you made some
> changes.

I found that, there is need to upgrade for other TDM slots configs.

> > I tested driver with 2 - 4 - 6 - 8 channnels I2S (2 slots TDM) with using
> > 1 -2 -3 -4 serializers. and S16_LE (will do S24_3LE) audio.
> Did you use aplay for this? If so, what were the parameters used. If not,
> can you describe how the userspace needs to manage the audio buffer? For
> anyone looking at leveraging the multi-serializer feature this information
> is important to highlight.

Yes aplay  -D "hw:1,0" -r48000 -fS16_LE -c6 < sine16_6ch.txt or similar. I 
hear 6ch audio on TAS5086. Also I had generated data and I saw data on 
This patch only exteds driver for using more serializers. When you run 2ch. or 
one serializer), there is same configuration  as was in previous driver 


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