[alsa-devel] [PATCH v3 0/2] UAC2 jack detection and clock validity

[Takashi Iwai]

On Sat, 24 Mar 2018 03:25:22 +0100,
Andrew Chant wrote:
> 
> These patches implement UAC2 jack detection.
> 
> This allows USB-to-3.5mm adapters and similar USB devices
> to report jack state via alsa control, using the reporting
> provided by the UAC2 connector control.
> 
> The second patch updates the clock validity control so
> it doesn't show up in mixer UIs.
> 
> I declined to mark the controls as VOLATILE since clients
> should always be notified of changes, since UAC devices
> are expected to generate interrupt messages when a control
> value changes.

Right, after consideration, I concluded that, too.
Sorry for confusion.


Takashi