Using VIM3 I2S as slave clock

E_H11 · January 27, 2022, 11:42am

Hello,
Is there any possiblity to put the Khadas vim3 as a i2s slave and use the clocks provided by the i2s device attached to it?

Best regards

jasonl · February 11, 2022, 8:59am

yes ,if you are using android ,you can modify the dts file arch/arm/boot/dts/amlogic/kvim3.dts as following

E_H11 · February 16, 2022, 3:35pm

Thanks @jasonl !
I’m using linux, so I’ll try to modify the kvim3_linux.dts and see what happens. It looks that on linux the first chunk of your diff is specified in the overlays/kvim3/i2s.dts
Thanks again!

Nil001 · March 21, 2022, 7:32am

Hello!
Is it possible to make an i2s MCLK signal as an input to apply an external clock from the DAC to it? I use Linux (Coreelec) on Khadas Vim 3. Thanks!

jasonl · March 22, 2022, 1:04am

@Nil001 you can ask @Frank for help

Frank · March 22, 2022, 2:20am

@E_H11 Hello, if you need, we can do a test with Ubuntu. But if you need to use Coreelec, you must test by yourself. Kernel with Coreelec is different with us Ubuntu kernel.

Nil001 · March 22, 2022, 7:11am

Many thanks for answers!

Frank · March 22, 2022, 10:28am

@Nil001 OK, I add it to my next week plan.

Nil001 · March 23, 2022, 9:05am

Thank you very much, Frank! I will be very happy about it.

wealas · March 30, 2022, 12:35pm

I would like to know the answer for Linux mainline kernel as well.

wealas · May 17, 2022, 11:20am

Hi @Frank did you get a chance to look into this?
Thanks!

JamesK · July 6, 2023, 7:37pm

How do we do this with the I2C port on Ubuntu? What would the DTS changes be?