Re: More CS4630, secondary CODEC output.

[Takashi Iwai <tiwai@suse.de>]

Hi Benny,

At Sat, 27 Jul 2002 01:01:48 +0200,
Benny Sjostrand wrote:
> 
> Hi again!
> 
> Seems there's quite big interest in the cs46xx stuff. Finally i've been 
> able to have output from
> the rear channel on the secondary CODEC. For the moment the output are 
> same on both
> rear and front channels, but it's possible to create a secondary .WAV 
> device and
> transfer two independent DMA channels to front and rear, and I believe 
> that I know
> how to do that, but that will require some more work and some drastic 
> changes in cs46xx_lib.c.
> 
> It was not easy to find out how to probe and speak to the secondary CODEC,
> it has to be done different with AC97 2.0 and AC97 1.03 codecs, on AC97 1.03
> I believe that codec_write && codec_read fucntions cant be the same so 
> for the moment
> (probably) only cards with AC97  2.0 codecs will work. I've only tested 
> this with "Hercules Game Theater",
> probably there will be a lot of strange behaviours with other soundcards.
> 
> Now the "Game Theater XP" got two CS294 codecs, and now the ALSA mixer 
> got two elements
> of almost everything, where about a 70% of all controls in the mixer are 
> probably totally meaningless,
> controlling stuffs that are not conected to CODEC any suggestions about 
> what to do with this ???
> It dont not feel necesary to have two Master volumes ...
> 
> Heres my new snaphot, you are welcome to test it out:
> http://www.cucumelo.org/~gorm/alsa-driver-0.9.0rc2-bs20020727.tar.gz
> http://www.cucumelo.org/~gorm/alsa-driver-0.9.0rc2-bs20020727.diff.gz

I merged your codes into the cvs.
The codes are almost identical except for small bugfixes,
re-indentation, and replacement of debug printing.

To be sure, the old dsp image is still chosen unless
CONFIG_SND_CS46XX_NEW_DSP is set to yes.
For compiling the new dsp image, please remove the comments in
alsa-driver/pci/cs46xx/Makefile.

The driver seems working on TerraTec DMX XFire.  The status is:
- OK: The first codec
- OK: SPDIF playback (audio)
- NG: SPDIF AC3 (non-audio)
- NG: The secondary codec, not detected.


Anyway, thanks for your work!

Please send patches againt cvs if you modify the driver more, so that
I can commit it soon.


ciao,

Takashi


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