I am not sure if it impacts non rk3399 devices or not, but on at least rk3399 devices after https://source.denx.de/u-boot/u-boot/-/commit/346df7d4fa62afc578d820b3a18815... was applied installing u-boot into SPI flash results in an unbootable system. SPL loads and runs, u-boot.itb is not found and the boot hangs. I am looking into it but would appreciate more eyes on it.

Dennis