[alsa-devel] [RFC][PATCH] pxa2xx-ac97: switch AC unit to correct state before probing

Dmitry Baryshkov dbaryshkov at gmail.com
Tue Nov 11 12:51:47 CET 2008

Mark Brown wrote:
> On Mon, Nov 10, 2008 at 10:11:24PM +0300, Dmitry Baryshkov wrote:
>> AC97 irq, I see a unending storm of irq requests. I've come with the
>> following patch (against 2.6.27, if the idea is OK, I'll rebase against
>> 2.6.28-rc).
> That's going to cause the pxa25x to use the full timeout for the reset
> since it uses the interrupt to detect completion.  This should just
> introduce a delay (which we shouldn't do) and may break something.  I'd
> expect that simply switching pxa25x to polling GSR for completion like
> everything else does would deal with it but testing would be nice if
> anyone has a board...

I'll check on tosa (pxa255). However I didn't notice any additional 
delay during startup.

> Otherwise it looks OK - we're not using the interrupt for anything else
> until after we've reset things so it's a sensible solution.

With best wishes

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