[alsa-devel] PS3 - Surround sound on SPDIF set-up

Takashi Iwai tiwai at suse.de
Fri Jul 6 11:26:52 CEST 2007

At Thu, 5 Jul 2007 15:37:48 -0700,
gt bradley wrote:
> Crud   :(
>  I had asked them and they said that the hypervisor should allow for AC3
> pass-through.  In my inital review of the snd_ps3.c code, it looked like it
> was basically a data-pump, handling the DMA & interupts to move data from
> the passed in stream to the h/w (via the hypervisor).  I also assumed that
> the iec bits (in headers in the SPDIF frames) were being set by higher
> levels in the software stack.
> If the bits are being set by the hardware and/or hypervisor then I'll have
> to fall back to plan "B".
> I've been programming for 20+ years, and have put kernel mods into
> production, but the last kernel hacking/device driver I did was in SYSV.  I
> can forward changes/fixes to Geoff, for inclusion rolling things
> "upstream".  I don't have direct access to inside information other than the
> source-code, but can forward the requests for more detailed info.

I have a contact with the driver author, and he seems to have little
time right now because of the rewrite of PS3 network driver as a
higher priority, unfortunately.


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