[alsa-devel] [PATCH v3 1/2] ALSA: jack: create jack kcontrols for every jack input device

[Mark Brown]

On Mon, Mar 23, 2015 at 12:57:02PM +0100, Takashi Iwai wrote:

> It's a good point.  The notification via kctl can't follow the
> complete state changes since it's nothing but a notification telling
> "something changed".  So, events like buttons that need the complete
> state change history, the current implementation isn't appropriate.
> For things like jacks, we usually care only about the final state, and
> the state change is much less frequent, so kctl notification works
> well.

I'd expect the buttons to be going through only as input devices, not as
kcontrols at all.
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