Rock pi s V13 acodec issue MIC Channels seems not to be working

#1

Rock Pi S : V13 - Analog Microphone Not working
We want to connect an Elecret Mic to MIC-P7, MIC-N7 and MIC_BIAS1.
Alsa Utils is installed and speaker is working.
However, we have been unable to get the microphone working.
The hardware circuit is tested and working OK.
We have also tried with the sample Debian image released by Radxa. MIC 1,2,7 and 8 all are not working.
We found a document stating a patch file was released by Radxa which includes correction for acodec.

We’re unable to find the patch. Where can we get it?
Or if there is something else we’re missing.

#2

Hi ccl

Can you tell me exactly which pins your microphone device is using on the PI-S? And what version of the system image are you using?

#3

Hi Mtchell,

We have tried the following pins:

With MIC Channel 1 : MICP7,MICN7, Mic Bias 1

With MIC Channel 2 : MIC P2,MICN2, Mic Bias 2

Kernel Version:-stable-4.4-rockpis

Acodec version: b

We have tried with 2 images :

  1. We created an image using yocto-dunfell and meta-radxa dunfell branches

  2. Radxa image : https://github.com/radxa/rock-pi-s-images-released/releases/download/rock-pi-s-v20210924/rockpis_debian_buster_server_arm64_20210924_0412-gpt.img.gz