[alsa-devel] A question about the soc jack status
broonie at opensource.wolfsonmicro.com
Wed Oct 28 11:21:41 CET 2009
On Wed, Oct 28, 2009 at 04:16:49PM +0900, Joonyoung Shim wrote:
> I have a question about soc jack. I know the soc jack reports the jack
> status when the jack status is change only. For example when the jack
> is inserted or released, the soc jack reports the jack status to user
> via input subsystem.
> But i want to know the jack status always regardless of the event to
> insert or release a jack. For example we can check the jack status
> always if the jack status is reported via sysfs file.
> So, is there how to know the jack status always the currently?
You can query this with an ioctl() on the input device - EVIOCGSW()
should do the trick, evtest.c has some example code I believe. Adding
this information to sysfs would be nice if someone has the time to look
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