iMX8MM support for HAB and encrypted image in the mainline

Hello everybody,

I have a board with iMX8MM that needs to have HAB and encryption of the U-Boot and kernel image active. OP-TEE is a nice to have, but no hard requirement and there is absolutely no need for any multimedia features (for all is needed the related blocks cold remain "dark").

I knew of course of the NXP fork used allover, that is mutilated beyond recognition IMHO, but I was wondering if the above needed features are supported in the mainline and if there is even a scrap of documentation/tutorial regarding implementing this on the mainlime.

Thanks and best regards,

Mircea