[QUESTION] CM5 / BCM2712: RP1 UART console support in U-Boot

[Chris Punt]

Hi,

I'm working with a Raspberry Pi Compute Module 5 and trying to expose a
debug UART via GPIO 8/9 (UART3 on RP1).

In Linux this works using:
  dtoverlay=uart3-pi5
  dtoverlay=stdout-uart3

However I cannot get U-Boot console output on these pins.

My understanding is that access to these UARTs requires RP1 support
through the BCM2712 PCIe root complex, which does not yet appear to be
implemented in U-Boot.

Is it currently expected that RP1 UARTs cannot be used for the U-Boot
console on Pi5 / CM5?

Thanks