u-boot rk356х (rockchip repository)

[dieselnutjob]

I had already done that step.
Before I noticed your reply I tried something else.
I bitwise copied (with dd) partition 2 and 3 from one of your SLARM64 images (so the EFI partition and rootlinux partition) onto the SDCard, but didn't touch the partition table nor partition 1.
It worked fine and booted up so I going say that it works.
I have copied the code here https://github.com/dieselnutjob/u-boot
With a readme here https://github.com/dieselnutjob/u-boot/b...4-a/README

hopefully in a way that's easy for less experienced people

Thanks for your efforts with this board.