> Is it my fault that we are using bl1+fip on RPi3? I don't remember, but
> I suppose we could easily switch to BL31 only like we have on RPI4

AFAIK, Andre P. was looking at unifying the pi3 tf-a target with pi 4 long term. I might end up proposing something there because after I fix DT handling in RPi3 (in the same way it's fixed for Pi 4 now), we're going to end up with a fairly obtuse-looking memory map. A bl31-only TF-A will mean simpler (and unified) memory map handling for Pi3/4.