Re: [PATCH] i810 audio fixes for 2.4.0-test13-pre5

From: Alan Cox (
Date: Fri Dec 29 2000 - 20:36:22 EST

> This patch addresses three problems in the i810-audio driver for
> 2.4.0-test13-pre5. I will be happy to split it if someone doesn't like
> part of it. (I see pre6 just popped out, there are no changes to this
> driver in pre6.)

> 1) "DMA overrun on send" - this contains a patch from Tjeerd Mulder that
> prevents almost all of this. I still get an occasional one during
> heavy video activity, the driver was unusable before. (This is a smaller
> patch than the previous flamed patch, it does no format conversion.)

Yeah I have Tjeerd's patches and no quibbles with them

> 3) Add a module parameter to supress powercycling the DACs on rate change -
> This causes a big pop on the outputs at least for the CS4299 codec in
> the emachines etower 700, probably others. I honestly can't find a
> reason to power cycle the DACs. There's nothing in the AC97 spec
> that suggests it should be done. The code is common to OSS and ALSA.
> I left the old behavior as the default. Maybe later the default should
> change if it turns out that everyone wants to force the parameter to
> zero.

What I would love someone to do (hint ;)) is to move the


type stuff into the ac97_codec - actually have a codec_ops in the AC97
for each type.

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