- On the imx8 mini, what are the best alternatives to get early print logs from the A53 and/or M4?
...all 4 UART's are taken for other things, so can't use these.
The most convenient would be to run it over a composite usb with cdc
Jtag would also be a good option since it doesn't eat any valuable gpio's...
- Is there any activity or prints on the two uarts during cold-boot / ROM (Serial Downloader)?
or is all of this explicitly activated in u-boot?