Re: [PATCH] save sound mixer state over suspend

Jeff Garzik (jgarzik@mandrakesoft.com)
Mon, 12 Nov 2001 01:03:00 -0500

Pete Zaitcev wrote:
>
> > Date: Sun, 11 Nov 2001 21:42:27 +0100 (CET)
> > From: Kai Germaschewski <kai@tp1.ruhr-uni-bochum.de>
> > To: <linux-kernel@vger.kernel.org>
> > cc: Linus Torvalds <torvalds@transmeta.com>, Pete Zaitcev <zaitcev@redhat.com>
>
> > The appended patch introduces two new functions to the ac97_codec
> > handling: ac97_save_state() and ac97_restore_state().
> > These functions save/restore the mixer state over suspend. (So after
> > resume the volume is the same it was before)
>
> The patch itself looks ok, but I am wondering what is
> the difference between your ac97_restore_state and ac97_reset.
> I think you may be reinventing the wheel here.

As we mentioned on IRC, ymfpci uses ac97_codec, which does not contain
the ac97_reset function.

> I cannot test the patch because my suspend/resume cycle
> retains mixer levels without it (2.2.14 stock, PCG-Z505JE),
> so I would not see any difference.

2.2.14? Is that a typo? His was patch for 2.4.15-pre2...

Anyway, my comments per request:
The patch looks ok, but I wonder about the order in ymfpci_resume. You
load the mixer values -then- call ymfpci_download_image and
ymfpci_memload. It seems for the purposes of general sanity and
stability you would want to load the mixer values after doing those two
operations.

Jeff

-- 
Jeff Garzik      | Only so many songs can be sung
Building 1024    | with two lips, two lungs, and one tongue.
MandrakeSoft     |         - nomeansno


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