On Tue, Aug 19, 2014 at 09:57:11AM +0530, Subhransu S. Prusty wrote:

On Mon, Aug 18, 2014 at 08:56:33AM -0500, Mark Brown wrote:

...

The problem is that it looks like you are reading the value from the control, treating it as a boolean and discarding it.

Well the mixer input is on/off, so it should be treated as boolean. How will it have any other value.

OK, so you're trying to read a boolean value. Perhaps what you need here is some comments then - the way you fiddle about with the bitmasks afterwards doesn't make it sufficient obvious.