Is there any I2S driver implementation in this kernel for esp32s3?

[sidianneng]

Hello,
I am working with this kernel on esp32s3. And I am trying to make it work with codec chip es8311. The I2C bus of this kernel works fine the my codec chip.
Here is the i2cdetect output of I2C bus:

~ # i2cdetect -y -r 0
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- -- -- -- -- -- -- -- -- -- -- -- --
10: -- -- -- -- -- -- -- -- 18 -- -- -- -- -- -- --
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --
70: -- -- -- -- -- -- -- --

But when I tried to make the I2S bus work. I found that there is no relative code in both device tree and I2S bus drvier.
So I want to know if there is any support for I2S bus? If not, do you have any plan to support it?

Looking forward to your reply~

[jcmvbkbc]

ATM there's no native I2S bus driver for esp32s3. And making it would require a DMA driver, which I started a while ago, but haven't completed. I haven't made any progress with this project in the last couple years and am not sure I'll get to it any time soon.

[sidianneng]

I see. I'd like to have a try to make it work on esp32s3. Do you have any suggesstion to achieve this?

[jcmvbkbc]

Depending on how deeply you'd like to get involved, you may either start with an existing drivers for other OSes, e.g. zephyr, and try to port it to linux, or you may start with the documentation and write it from scratch, taking an existing linux driver as an example. I have an impression that I2S controller itself is rather simple and that the DMA is the harder part.

[sidianneng]

Thank you. I will try your suggesstions and I hope I can make it.