On Thu, May 10, 2012 at 10:45:08AM +0100, Mark Brown wrote:

On Thu, May 10, 2012 at 05:41:15PM +0800, Shawn Guo wrote:

quoted

The "Mic Bias" here is really a SGTL5000 internal supply.

If it is then what's providing the bias to the mic?  It's common for
chips to have a micbias supply which comes out of the chip and is used
by mics, this is my understanding of what this circuit is.

+1