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SubjectRe: [alsa-devel] [PATCH] ALSA: SoC: Added jack detection kcontrol support
On 07/24/2013 02:13 AM, Mark Brown wrote:
> On Tue, Jul 23, 2013 at 05:10:29PM -0700, Felipe Tonello wrote:
>> On Tue, Jul 23, 2013 at 5:40 AM, Mark Brown <broonie@kernel.org> wrote:
>
>>> This was the existing kernel API at the time that the code was added -
>>> I beleive people had been doing that for simple switches that detect the
>>> physical presence of a jack since it looks exactly like a button from a
>>> hardware point of view. See the original commit adding the code.
>
>> I saw it. I don't know what you think is the best way to go. I'm not
>> sure if someone is using this input event API, since even PulseAudio
>> even declined that implementation due KControl implementation.
>
> It's used quite a bit in embedded systems, there are actually patches
> for PulseAudio which were deployed for a while- I guess they might have
> been removed or something.

The input event implementation was only in Ubuntu (for a release or
two), and was never merged in upstream PA. (I guess one could find them
by looking in the Ubuntu archives.)

--
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic


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