[Pkg-raspi-maintainers] Bug#989838: needs adaptation to EFI-booted Debian on Raspberry Pi 4

[Aaron Rainbolt]

I created an MR for raspi-firmware that takes some of these concerns
into account:
https://salsa.debian.org/debian/raspi-firmware/-/merge_requests/40
It's mostly intended to make U-Boot's EFI implementation easier to
manage, but I assume it would be applicable here too.

The firmware is loaded from the /firmware directory before Linux is
started. It's actually loaded by some component of the Raspberry Pi
firmware before even the bootloader / UEFI binary I believe, since
U-Boot somehow has the needed device trees already in memory when it
goes to boot an OS. I have been able to get a GUI on a U-Boot EFI +
GRUB-booted Debian Forky installation on an RPi 4.

--
Aaron
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