On Tue, Feb 08, 2011 at 12:34:09PM -0800, Stephen Warren wrote:
Maybe I should just not implement mic detection for Harmony due to these issues? In which case, I'd just let mic bias be enabled whenever capture was active, just like the speaker enable GPIO.
It certainly seems way more trouble than it's worth: as soon as the on board mic is used the jack detection will get confused as it'll see it. Of course, the internal mic is actually plugged in to a header on the main board so it may be absent too (I believe a lot of units were shipped without a case...) which means detecting the internal mic might actually be useful :)
Either way, I suppose I should add two explicit mic widgets, each directly driving the appropriate GPIO, so that the user can select which mic(s) actually get used for capture.
Does that sound reasonable?
I think that's the best approach. If someone wants to do mic detection they can always add it later.