[alsa-devel] AC97 reset fail after suspend

[Marek Vasut]

On Friday 08 of May 2009 01:48:19 Tomas 'Sleep_Walker' Cech wrote:
> Hi,
>
> I've got following error on Palm LifeDrive and PalmTX after suspend &
> resume:
>
> pxa2xx_ac97_try_warm_reset: warm reset timeout (GSR=0x0)
> pxa2xx_ac97_read: read error (ac97_reg=0 GSR=0x0)
> pxa2xx_ac97_try_cold_reset: cold reset timeout (GSR=0x44)
> pxa2xx_ac97_read: read error (ac97_reg=0 GSR=0x44)
> WM9712 AC97 reset failed
> could not reset AC97 codec
>
> That completely disable whole AC97 communication, so touchscreen, sound and
> battery doesn't work any longer.
>
> I also tried this with Treo680 (code will be sent soon). HW is very
> similar, only codec is different - LD/T5/TX use WM9712, Treo680 use WM9713.
> On Treo680 there is no problem with that.
>
> Thanks for any hint about that.
>
> Tomas 'Sleep_Walker' Cech
>
> Attaching config for LD/TX and dmesg output.

The following patch fixes the issue and should be correct. It's indeed a 
regression that's not in wm9713, but is in wm9712. Please consider applying.
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