Re: intel8x0 has stopped working.

[Takashi Iwai <tiwai@suse.de>]

At Fri, 06 Feb 2004 20:05:42 +0000,
James Courtier-Dutton wrote:
> 
> Takashi Iwai wrote:
> > At Thu, 05 Feb 2004 22:28:03 +0000,
> > James Courtier-Dutton wrote:
> > 
> >>I checked out a new anonymouse cvs of alsa-driver/alsa-kernel, applied 
> >>your patch, and attach the output from doing modprobe snd-intel8x0.
> >>
> >>I can only see printf's in the patch, so I don't see how it could have 
> >>fixes the VRA.
> > 
> > 
> > no, it doesn't fix yet.
> > 
> > 
> >>Feb  5 22:22:53 new kernel: determined VRA rates: 0xfe
> >>Feb  5 22:22:53 new kernel: determined VRA rates: 0xfe
> >>Feb  5 22:22:53 new kernel: determined SPDIF rates: 0xe0
> >>Feb  5 22:22:53 new kernel: determined SDAC rates: 0x80
> >>Feb  5 22:22:53 new kernel: determined LDAC rates: 0x80
> > 
> > 
> > here's the problem.  surround and LFE DAC sample rates are not
> > detected properly.
> > i don't figure out yet why...
> > 
> > does the attached patch have influence?  check the messages above.
> > (it doesn't contain the patch to ac97_pcm.c.  it's not needed now.)
> > 
> > 
> > Takashi
> > 
> > 
> I checked out a new cvs of alsa-driver, alsa-kernel
> Added your patch, and the rates are detected correctly now, and the 
> rates change on the hardware correctly now.
> Thanks

thanks for the confirmation.  i'll apply the patch to cvs.

> By looking at your code, it looks like you are making sure the rate for 
> the Front, Surround and Center/LFE all change together, which seems to 
> work, although, the alc650 datasheet spec does not seem to mention that 
> this has to happen. Why have 3 ac97 registers, if they all have to 
> change together?

we're fooled :)

sometime it is explicitly written that the surround and LFE rates are
simply the mirror of the front/center rate.
that's why the fix came into my mind.


Takashi


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