[alsa-devel] [PATCH 14/14] ASoC: wm9712/wm9713: Use shared controls

[Lars-Peter Clausen]

On 10/31/2014 06:40 PM, Mark Brown wrote:
> On Thu, Oct 30, 2014 at 09:01:11PM +0100, Lars-Peter Clausen wrote:
>
>> Note: This changes the exposed controls, instead of having one "Left HP
>> Mixer ..." and one "Right HP Mixer ..." control for each input there will
>> only be a single "HP Mixer ..." control.
>
> This change would be a win except for the above - these devices were
> very widely deployed in fairly popular devices like the Sharp Zaurus
> devices so there's quite a bit of deployed distro config in things like
> Angstrom which would get broken if we updated, and some user community
> remaining too.  On balance I'd say that the cleanup to use the new
> feature isn't worth the disruption it'd cause to userspace.

It was worth a try ;) We can still clean this up using custom put/get 
handlers instead of virtual registers.