Hello! I am porting audio driver for jetson nx emmc module. My own customized carrier board has a wm8731 audio codec. I didn’t find dma.c. Did the 4.9.10 kernel make changes to the audio driver framework? I have referred to the developer guide, but did not get help. Can you give me a successful case of successfully transplanting audio drivers to the same series of chips? Or you can give me the framework diagram of the new audio driver software. That would be greatly appreciated.
An additional question is which series of Tegra20 and Tegra30 is nx?