[alsa-devel] [PATCH 2/8] ASoC: Add support for virtual switch controls

Mark Brown broonie at opensource.wolfsonmicro.com
Fri Jan 11 17:24:03 CET 2013

On Thu, Jan 10, 2013 at 05:06:11PM +0100, Lars-Peter Clausen wrote:
> Virtual switches are similar to virtual MUX controls. It does not have a
> representation in the actual hardware but allows to control the DAPM routing by
> enabling or disabling a input path into the mixer. This is useful if we want to
> present a way to the user to for example mute a path despite the absence of a
> separate mute control in hardware.

So, following IRC discussion it seems like the main issue here is that
the changelog is the main issue here - this is actually for moving the
writes done when controlling a DAPM mixer input rather than adding new
widgets to control power on/off of paths.
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