Re: [PATCH] ASoC: MPC5200: Support for buffer wrap around

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On Sat, Aug 01, 2009 at 08:04:56AM -0700, John Bonesio wrote:

> When I umuted the PCM mixer setting, this printk text did not appear,
> yet when I read the mixer register setting for the headphone, it was set
> back to mute.

Like I said before, exactly which control are you adjusting here?

> If there is code in software doing this, it's very subtle.

My money would be on the AC97 controller having problems; the quality of
SoC AC97 controllers is variable.  It certainly doesn't sound like a
WM9712 issue; as I say I'd be very surprised if such an issue hadn't
come up before given how widely deployed the part is.
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