[RPi5] HiFiBerry Amp4 Pro

I've not seen a specific success report, but LE12 runs great on RPi5 and since RPi5 uses the identical HAT spec as all Pi boards, it's not something I would expect issues from.

This is an exotic HAT, so we don't have any proof here on the forum. Just give it a shot.

LieberBieber

because the RPi5 is powered from the backside via GPIO, maybe with the Amp4 Pro you are now in the same situation like the Argon ONE V3 users and needs to tell the RPi5 that the used power supply is strong enough. Especially if you have attached additional USB devices.

Try to get it stable with these configuration changes:

Add these lines to bootloader config/EEPROM:
PSU_MAX_CURRENT=5000

and to your config.txt:
usb_max_current_enable=1

Regarding documentation here is a (maybe outdated) one:
LibreELEC installation and configuration | HiFiBerry
Test the new Amp4 Pro | HiFiBerry

Because of the information in the linked blog, I assume you should use this configuration line for the Amp4 Pro
dtoverlay=hifiberry-amp4pro

I copy the solution from another thread, just in case. This is the current workaround from HiFiBerry:

Changes in HiFiBerry drivers | HiFiBerry