[alsa-devel] AIC3106 problem with driver (MIC BIAS)

Hello, I'm using linux 3.12 kernel for TI SITARA ARM (am335x) with TI AIC3106 codec ( tlv320aic3x.c driver). There is a mic bias support through device tree option aic3x-micbias-vg. But in fact it's not working correctly. During kernel booting it's setting (after 2-3 seconds) but after finish booting it's cleared. Even if I change the default regs values in aic3x_reg, it's cleared after booting. Could somebody point me to solution? Another thing I need to do is to get mic/headset detection in mixer. There is some code in driver ("Detection" output) but actually I don't understand right way of using it.

Best regards, Tim Karaldin