Hello all,
I've been using i.MX8 QuadMax MEK in an infotainment-related project for a while now. I am trying to implement HFP-based telephony application which requires a mic on board. However, mic does not seem to work at all for me on our i.MX8.
To capture the audio, simply I use:
arecord -f dat -d 10 -D hw:0,1 test.wav
To play the audio, I use:
aplay -f dat test.wav
Following is the list of sound devices:
root@imx8qmmek: ~# aplay -l
**** List of PLAYBACK Hardware Devices ****
card 0: wm8960audio [wm8960-audio], device 0: HiFi wm8960-hifi-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: wm8960audio [wm8960-audio], device 1: HiFi-ASRC-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
card 1: imxaudiohdmi [imx-audio-hdmi], device 0: imx8 hdmi snd-soc-dummy-dai-0 []
Subdevices: 1/1
Subdevice #0: subdevice #0
Steps to reproduce/debug the problem:
- Different mics are used (Philips, JBL) -> no audio
- When JBL's mic button is pressed, playback has some noise at the times I press the button, no sound still
- iMX Linux Release Note states that WM8962 is for record and playback for i.MX8 QuadMax -> However, with the fsl-imx-wayland distro, we get the firmware for wm8960 I think.
- In iMX Linux Reference Manual (Sect 7.1.5.1. and following sections), there seems to be information to activate microphone/audio recording in other boards such as i.MX6 / i.MX7, but there is no information for i.MX8.
- I tried the section for i.MX7, which also has wm8960, but it did not work.
It would be a great help if I could understand if i.MX8 really supports microphone through its J15 MP-MIC connector, with the latest available fsl-imx-wayland BSP with Linux version 4.9.51.
Thanks for the help in advance.
Note; I'm willing to post more logs upon your request
Greetings
