Hi Jon,
Another question . In the older forum post. it is known issue that DTB change will not enable the I2S4 change. and we have to patch the u-boot and reflash the u-boot . I2S audio output not working - #16 by mkumard . and you were on that thread as well.
Does that mean with Jetpack I can change DTB to enable the I2S ? if yes I still need your help to figure out how to use PINMUX spreadsheet.
Thanks