sound not working on ppc

[Martin Pitt]

The sound card in ppc is on the ADB bus which is not currently supported by
hotplug. Therefore a sane solution would be to either put the modules into
/etc/modules on ppc or introduce a fake dependency of a mac-specific module to
the sound modules.

Specifically, the following modules should be loaded:

snd-powermac
snd-pcm-oss
snd-mixer-oss

[Colin Watson (cjwatson)]

This depends on the powerpc system, of course.

Can we detect this by looking around the mac-io bus? hw-detect already does that
for some Mac hardware. I would very strongly prefer not to just hardcode this.

[Colin Watson (cjwatson)]

A tarball of /proc/device-tree`cat /proc/device-tree/aliases/mac-io` would
probably be useful in investigating this.

[Martin Pitt (pitti)]

I put the tarball on http://www.piware.de/macio-dev-tree.tar.gz.

[Colin Watson (cjwatson)]

Thanks for that. i2s@10000/i2s-a@10000/sound seems to be the relevant node.
sound/ppc/pmac.c:snd_pmac_detect() in the kernel looks for this, and we can
duplicate its logic in shell.

(Of course, in the long run it would be better if this were discoverable or
hotpluggable.)

[Colin Watson (cjwatson)]

I've implemented this in debian-installer upstream, since mac-io bus hardware
detection really needed a bit of a reorganization. I'll grind the wheels to get
that change into Warty.

[Colin Watson (cjwatson)]

Fixed in warty a while ago, but I forgot to close this bug.

ddetect (1.03ubuntu1) warty; urgency=low

  * Merge from Debian to get mac-io detection improvements.

 -- Colin Watson <email address hidden> Thu, 2 Sep 2004 14:51:54 +0100

  * Colin Watson
    - Detect dmasound_pmac/snd-powermac (depending on kernel version) on
      PowerMacs.