Re: nvram polling for hardware mixer

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On Tue, 29 May 2007, Bastien Nocera wrote:
> > I've been hacking to make the nvram hardware buttons on thinkpad exposed
> > as a hardware mixer device. This requires the nvram to be polled in
> > kernel space, and then examined to see if the volume and mute status has
> > changed. I have attached code to export a simple mono tuner, but this
> > needs further testing and integration. I've also prepared a preliminary
> > patch to add the polling to the thinkpad_acpi driver.
> > 
> > Please review, and make sure I'm on the right lines. I also can't see
> > the input patches in the ibm-acpi-2.6 tree, so I've done this against
> > linus. This isn't for merging, it's just a preview for comments.
> 
> I'm thinking.
> 
> Why is defining a _new_ device with its own mixer a good idea? Isn't it
> actually supposed to be a track in the builtin ALSA device instead? And
> then we'd get feedback from that one...

See thread in alsa-devel about it.

It should be a separate device, a mono mixer with a mute control.

-- 
  "One disk to rule them all, One disk to find them. One disk to bring
  them all and in the darkness grind them. In the Land of Redmond
  where the shadows lie." -- The Silicon Valley Tarot
  Henrique Holschuh

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