[alsa-devel] [PATCH 1/4] ASoC: DAPM: Allow multiple mixer sources to be routed via the same switch

[Lars-Peter Clausen]

On 08/11/2011 11:31 AM, Mark Brown wrote:
> On Wed, Aug 10, 2011 at 05:52:41AM +0200, Lars-Peter Clausen wrote:
>> Currently it is only possible to route one source per switch into a mixer.
>> This patch modifies the code, so that it is possible to route multiple sources
>> into a mixer via the same switch. One use-case for this is routing a stereo
>> channel pair into a mono-mixer via the same switch.
>
> I'd have thought the dapm_is_shared_control() stuff should handle this?


The dapm_is_shared_control() stuff is about sharing kcontrols between multiple
muxes. This is about sharing the same kcontrol between multiple paths of the
same mixer.

i.e

{ "Mono Mixer", "DAC", "Left DAC" },
{ "Mono Mixer", "DAC", "Right DAC" },

doesn't work without this patch.