At Mon, 03 Feb 2003 11:36:30 +0100,
David Björkevik wrote:
>
> Takashi Iwai wrote:
> >
> > At Sun, 02 Feb 2003 07:03:02 -0500,
> > [EMAIL PROTECTED] wrote:
> > >
> > > In message <[EMAIL PROTECTED]>, [EMAIL PROTECTED]
> > > om writes:
> > >
> > > >I have produced a minimal patch based upon your work in CVS to get the SPDIF
> > > >port going on A7V8X motherboards with 0.9.0rc6 until 0.9.0rc7 is released:
> > >
> > > I'm not sure what went wrong with 0.9.0rc7, but SPDIF output still doesn't
> > > work with my chipset. The patch only had cosmetic changes in the 0.9.0rc7
> > > release, so something must have been broken between the CVS tree as of December
> > > 30th and the 0.9.0rc7 release.
> >
> > on rc7, you don't need a patch. try to use "spdif" pcm for the spdif
> > output. it uses the SDX3 channel as described in the data sheet.
> >
> > playing through the spdif-out on the multi-channel is still posstible,
> > too. but you need to reset "IEC958 AC97-SPSA" to 0, which corresponds
> > to the slot 3/4, while the slot 10/11 is used as default on via823x.
>
> This did not work for me. Using rc7 my DAC does not lock to a signal
> using any combination of spdif/default output or AC97-SPSA setting.
>
> When applying jgotts patch to rc6 I managed to get lock on some
> combinations, but the signal still seemed strange and my DAC did not
> produce any sound.
hmm.
the behavior of via82xx driver depends on the chip model.
hence, first, please check your chip model listed on
/proc/asound/cards.
if it's a VIA8233A, you need to set
- "IEC958 Output" to true
- "IEC958 Playback" to true
- "IEC958 SPSA" to 0
i'm not sure whether "IEC958 Output" can be false.
this register bit controls the DSX3 channel spdif output.
the playback on the DSX3 channel is implemented as hw:1 but i don't
know whether this channel is available on VIA8233A.
if you have VIA8233A, please check whether playback on hw:1 does work
(regardless whether the sound comes out or not).
% aplay -Dhw:1 foo.wav
if you have another VIA823x, namely, 8233, 8233C and 8235 chips, you
must have valid DSX channels.
Takashi
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