I am running linaro (not android). Version details -
Linux linaro-developer 4.4.9-linaro-lt-qcom #1 SMP PREEMPT Thu Jun 30 21:34:48 UTC 2016 aarch64 GNU/Linux
What is the procedure to get the analog mic input working. I just need one microphone to work to begin with. I don’t have any preference between Mic1/2/3. I tried connecting an analog mic as follows -
- CDC_MIC3_P connected to analog output of the mic (pin 7 on J7)
- GND_FILT connected to the mic’s ground (pin 5 on J7)
- CDC_MIC_BIAS1 connected to mic’s power (pin 12 of J7).
I see that the voltage on CDC_MIC_BIAS1 is 0V. That is surprising as some of the android counterparts on other forums seem to be reporting about 1.7V. Is the analog mic interface not supported on the regular linaro distribution?
Any help would be greatly appreciated!.