[alsa-devel] Broken headphone and speaker amplifier suppliesforthe rt5640 driver

[Mark Brown]

On Mon, Jul 29, 2013 at 08:14:51AM +0200, Lars-Peter Clausen wrote:

> Yea, so the stuff I was working on while I stumbled upon this was more or
> less that. Support for letting DAPM mute controls, which are also exposed to
> userspace, if necessary in order to avoid clicks and pops. Once muted by
> DAPM userspace will only see a cached value of the controls state and once
> DAPM unmutes the control the userspace state will be restored.

Oh, cool.  That's not really been an issue with most ground referenced
hardware (at least not normally) but it'd really useful for a large
proportion of VMID based devices.
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