iMac: sound?

iMac: sound?

[Gerd Knorr]

  Hi !

Is the existing Amiga/PowerMac DMAsound driver supported to work on the
iMac too?  Simply insmoding it seems not to work, I get these messages in
the syslog:

	AWACS: error, status = 4f00d0
	DMA sound driver: Interrupt initialization failed

In /proc/device-tree/pci/mac-io/davbus/sound I've found:

$ for a in *; do echo "$a: `cat $a`"; done | tee ~/y
#input-channels: 
#output-channels: 
compatible: burgundy
device-id: 
device_type: sound
input-encoding-types: 16bit-BE-signed-linear
input-frame-rates: 
model: 343S0177
name: sound
output-encoding-types: 16bit-BE-signed-linear
output-frame-rates: 
sample-frame-size: 
sample-precisions: 
sub-frame: 
vendor-id: 

Any hints?  Is there a change to make sound work with some tweaking in 
dmasound.c or this something completely different?

  Gerd


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Re: iMac: sound?

[Geert Uytterhoeven]

On Sat, 30 Jan 1999, Gerd Knorr wrote:
> Is the existing Amiga/PowerMac DMAsound driver supported to work on the
> iMac too?  Simply insmoding it seems not to work, I get these messages in
> the syslog:
> 
> 	AWACS: error, status = 4f00d0
> 	DMA sound driver: Interrupt initialization failed
> 
> In /proc/device-tree/pci/mac-io/davbus/sound I've found:
> 
> $ for a in *; do echo "$a: `cat $a`"; done | tee ~/y
> #input-channels: 
> #output-channels: 
> compatible: burgundy
              ^^^^^^^^
Some time ago I read about a patch to make dmasound work on the burgundy.

<searching>

Posted to this list by Brian Foley <brianfoley@tinet.ie> on Jan 18, 1999.

Greetings,

						Geert

--
Geert Uytterhoeven                     Geert.Uytterhoeven@cs.kuleuven.ac.be
Wavelets, Linux/{m68k~Amiga,PPC~CHRP}  http://www.cs.kuleuven.ac.be/~geert/
Department of Computer Science -- Katholieke Universiteit Leuven -- Belgium


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Re: iMac: sound?

[Paul Mackerras]

Gerd Knorr <kraxel@goldbach.in-berlin.de> wrote:

> Is the existing Amiga/PowerMac DMAsound driver supported to work on the
> iMac too?  Simply insmoding it seems not to work, I get these messages in
> the syslog:
> 
> 	AWACS: error, status = 4f00d0
> 	DMA sound driver: Interrupt initialization failed

That's a symptom of macos having shut down the awacs chip.  I haven't
found any way short of a hard reset to start it up again.

The dmasound.c in my anon rsync tree (samba.anu.edu.au::linux-pmac-devel)
has very minimal burgundy support already.  I (and Peter Barker here)
are working on it now.

Paul.

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