powerpc and snd-powermac mixer

powerpc and snd-powermac mixer

[Rene Rebe]

Hi,

the powermac driver has some problems on my (three weeks old) iBook
(800Mhz).

PCM access is useable (and I hear the sound very quietly) - but the
mixer is not doing anything noticeable with the hardware (i.e. no
volume change).

The in-kernel oss driver does not even load - only the updated one
from the -benh kernel tree is loadable and does indeed work correctly.

So I guess the als-driver needs some cut'n paste of register tables or
so.

- René

--  
René Rebe - Europe/Germany/Berlin
e-mail:   rene@rocklinux.org, rene.rebe@gmx.net
web:      http://www.rocklinux.org/people/rene http://gsmp.tfh-berlin.de/rene/

Anyone sending unwanted advertising e-mail to this address will be
charged $25 for network traffic and computing time. By extracting my
address from this message or its header, you agree to these terms.


-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

Re: powerpc and snd-powermac mixer

[Takashi Iwai]

At Sun, 11 May 2003 12:47:56 +0200 (CEST),
Rene Rebe wrote:
> 
> Hi,
> 
> the powermac driver has some problems on my (three weeks old) iBook
> (800Mhz).
> 
> PCM access is useable (and I hear the sound very quietly) - but the
> mixer is not doing anything noticeable with the hardware (i.e. no
> volume change).
 
could you tell me the chip model (shown in /proc/asound/cards)?
there are many different models supported by this driver.

> The in-kernel oss driver does not even load - only the updated one
> from the -benh kernel tree is loadable and does indeed work correctly.

ok, at least there is something to refer...


thanks,

Takashi


-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

Re: powerpc and snd-powermac mixer

[Rene Rebe]

Hi,

On: Mon, 12 May 2003 14:57:33 +0200,
    Takashi Iwai <tiwai@suse.de> wrote:

> At Sun, 11 May 2003 12:47:56 +0200 (CEST),
> Rene Rebe wrote:
> > 
> > Hi,
> > 
> > the powermac driver has some problems on my (three weeks old) iBook
> > (800Mhz).
> > 
> > PCM access is useable (and I hear the sound very quietly) - but the
> > mixer is not doing anything noticeable with the hardware (i.e. no
> > volume change).
>  
> could you tell me the chip model (shown in /proc/asound/cards)?
> there are many different models supported by this driver.

Hm. The strange thing is that it works now ... But in the effort of
completing our PowerPC port I already updated to the -benh10 kernel
and from alsa-driver-0.9.2 to 0.9.3a ... so some change made it work
...

0 [Snapper        ]: PMac Snapper - PowerMac Snapper
                     PowerMac Snapper (Dev 28) Sub-frame 0

When the mixer doesn't work again I'll contact you ...

Looking forward to meet you at the Linux Tag in Karlsruhe again ;-)

> > The in-kernel oss driver does not even load - only the updated one
> > from the -benh kernel tree is loadable and does indeed work correctly.
> 
> ok, at least there is something to refer...
> 
> 
> thanks,
> 
> Takashi

- René
    / ROCK Linux stable release maintainer

--  
René Rebe - Europe/Germany/Berlin
  rene@rocklinux.org rene.rebe@gmx.net
http://gsmp.tfh-berlin.de/gsmp http://www.rocklinux.org
http://www.rocklinux.org/people/rene http://gsmp.tfh-berlin.de/rene/



-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

Re: powerpc and snd-powermac mixer

[Rene Rebe]

Hi,

On: Mon, 12 May 2003 15:58:40 +0200 (CEST),
    Rene Rebe <rene.rebe@gmx.net> wrote:

> Hm. The strange thing is that it works now ... But in the effort of
> completing our PowerPC port I already updated to the -benh10 kernel
> and from alsa-driver-0.9.2 to 0.9.3a ... so some change made it work
> ...

Hm. After a reboot into the same kernel it doesn't work anymore - so
this seems to be quite random when the mixer is funtional :-(

I'll try to find a reproduceable way for working sound ...

> 0 [Snapper        ]: PMac Snapper - PowerMac Snapper
>                      PowerMac Snapper (Dev 28) Sub-frame 0
> 
> When the mixer doesn't work again I'll contact you ...
> 
> Looking forward to meet you at the Linux Tag in Karlsruhe again ;-)

Sincerely,
  René Rebe
    - ROCK Linux stable release maintainer

--  
René Rebe - Europe/Germany/Berlin
  rene@rocklinux.org rene.rebe@gmx.net
http://www.rocklinux.org http://www.rocklinux.org/people/rene       
http://gsmp.tfh-berlin.de/gsmp http://gsmp.tfh-berlin.de/rene


-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

Re: powerpc and snd-powermac mixer

[Rene Rebe]

Hi,

On: Wed, 14 May 2003 11:31:27 +0200 (CEST),
    Rene Rebe <rene.rebe@gmx.net> wrote:
> Hi,
> 
> On: Mon, 12 May 2003 15:58:40 +0200 (CEST),
>     Rene Rebe <rene.rebe@gmx.net> wrote:
> 
> > Hm. The strange thing is that it works now ... But in the effort of
> > completing our PowerPC port I already updated to the -benh10 kernel
> > and from alsa-driver-0.9.2 to 0.9.3a ... so some change made it work
> > ...
> 
> Hm. After a reboot into the same kernel it doesn't work anymore - so
> this seems to be quite random when the mixer is funtional :-(
> 
> I'll try to find a reproduceable way for working sound ...

Loading and unloading the dmasound_pmac driver first helps. After that
procedure the snd-powermac can control the mixer correctly.

One other strange thing: When the dmasound_pmac driver was used for
"initilizing" the mixer is not muted (as in the other ALSA PCI
drivers) and the mixer values are quite random (output in the speakers
...) although the alsamixer shows they are all muted and 0. The mixer
hardware gets the value shown in alsamixer on the first value change.

> > 0 [Snapper        ]: PMac Snapper - PowerMac Snapper
> >                      PowerMac Snapper (Dev 28) Sub-frame 0
> > 
> > When the mixer doesn't work again I'll contact you ...
> > 
> > Looking forward to meet you at the Linux Tag in Karlsruhe again ;-)

Sincerely,
  René Rebe
    - ROCK Linux stable release maintainer

--  
René Rebe - Europe/Germany/Berlin
  rene@rocklinux.org rene.rebe@gmx.net
http://www.rocklinux.org http://www.rocklinux.org/people/rene       
http://gsmp.tfh-berlin.de/gsmp http://gsmp.tfh-berlin.de/rene


-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

Re: powerpc and snd-powermac mixer

[Rene Rebe]

Hi,

sorry for mail-bombing ...

On: Wed, 14 May 2003 11:40:43 +0200 (CEST),
    Rene Rebe <rene.rebe@gmx.net> wrote:

> Loading and unloading the dmasound_pmac driver first helps. After that
> procedure the snd-powermac can control the mixer correctly.
> 
> One other strange thing: When the dmasound_pmac driver was used for
> "initilizing" the mixer is not muted (as in the other ALSA PCI
> drivers) and the mixer values are quite random (output in the speakers
> ...) although the alsamixer shows they are all muted and 0. The mixer
> hardware gets the value shown in alsamixer on the first value change.

One more odd thing:

Normally sleep does work excellent on the PowerPC architecture - but
the snd-powermac ALSA driver doesn't like a resume that much. PCM
"seems" to work ok, but the mixer is muted, and when the slider are
touched the valume changes quite randomly ... :-(

I know that the suspend stuff for ppc in 2.4 is rather hacked (given
that no sysfs is available ...) but IMHO this should behave better ;)

Sincerely,
  René Rebe
    - ROCK Linux stable release maintainer

--  
René Rebe - Europe/Germany/Berlin
  rene@rocklinux.org rene.rebe@gmx.net
http://www.rocklinux.org http://www.rocklinux.org/people/rene       
http://gsmp.tfh-berlin.de/gsmp http://gsmp.tfh-berlin.de/rene


-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com

Re: Re: powerpc and snd-powermac mixer

[Takashi Iwai]

At Wed, 14 May 2003 11:48:18 +0200 (CEST),
Rene Rebe wrote:
> 
> Hi,
> 
> sorry for mail-bombing ...
> 
> On: Wed, 14 May 2003 11:40:43 +0200 (CEST),
>     Rene Rebe <rene.rebe@gmx.net> wrote:
> 
> > Loading and unloading the dmasound_pmac driver first helps. After that
> > procedure the snd-powermac can control the mixer correctly.
> > 
> > One other strange thing: When the dmasound_pmac driver was used for
> > "initilizing" the mixer is not muted (as in the other ALSA PCI
> > drivers) and the mixer values are quite random (output in the speakers
> > ...) although the alsamixer shows they are all muted and 0. The mixer
> > hardware gets the value shown in alsamixer on the first value change.
> 
> One more odd thing:
> 
> Normally sleep does work excellent on the PowerPC architecture - but
> the snd-powermac ALSA driver doesn't like a resume that much. PCM
> "seems" to work ok, but the mixer is muted, and when the slider are
> touched the valume changes quite randomly ... :-(

perhaps it's the same reason that the ALSA driver works only after
dmasound_pmac.

the tumbler/slapper is connected via i2c, and the initialization (and
the mixer access) is done over i2c commands.
the chip doesn't provide the read function.  so the driver caches the
latest values.  that's why you get all volumes muted but in fact they
not.

anyway, i've changed a bit powermac driver on cvs.
please give a try.


ciao,

Takashi


-------------------------------------------------------
Enterprise Linux Forum Conference & Expo, June 4-6, 2003, Santa Clara
The only event dedicated to issues related to Linux enterprise solutions
www.enterpriselinuxforum.com