[Cbe-oss-dev] snd_ps3pf: PS3 ALSA Sound Driver, Support for AC3/DTS Passthrough

Geoff Levand geoffrey.levand at am.sony.com
Tue Mar 20 01:40:32 EST 2007

Marc Bevand wrote:
> According to the very limited public documentation about the sound
> chip available on [2], it looks like it probably supports AC3/DTS
> passthrough however [1] does not implement this feature. I have
> looked at the source code and am not very familiar with the ALSA API
> but it seems that adding support for this feature would just require
> the implementation of a new snd_kcontrol_new named "IEC958
> Playback Default" whose purpose would be to set some control bits
> in the frames sent over the S/PDIF output. This can probably be done
> in only 100-200 lines of code.
> I have 2 questions:
> o Does Sony plan to add support for AC3/DTS passthrough in the near
>   future ? It doesn't look like a complex task.

There is no plan to do this at the moment, and I don't know if it
possible.  I will inquire if it is.  Please feel free to submit 
patches against ps3-linux.git after the sound driver is released.
I will not consider patches against the legacy 2.6.16 kernel.

> o When will snd_ps3pf be ported to the git tree [3] ?

It is in progress, but not ready to commit yet.  Maybe in a few


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