[alsa-devel] PXA27x and AC97 reset bug

Dmitry Baryshkov dbaryshkov at gmail.com
Thu Feb 7 02:10:55 CET 2008


Robert Jarzmik wrote:

> I hope this subject wasn't previously discussed, as I couldn't find a
> trace ...
> The basic question is : why can't the PXA27x reset the AC97 bus in front
> of an wm9713 ?

I have nearly the same problem here: pxa255, wm9712, sharp SL-6000 (tosa).
However resetting the codec in a loop sometime helps.

Any info would be appreciated.

> And more precisely, I'd like to know :
>  - are there any references to this bug (Intel note, mailing list ref,
>  ...) - is it a hardware bug on PXA27x side ? - is it a hardware bug on
>  wm9713 side ? - is there a known generic workaround (assuming GPIO113
>  is connected to wm9713
> reset line is not generic for me) ?
>  - is there a known platform where this bug does not happen ?

With best wishes

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