[Star64] UART activity stopped

[yogo1212]

I was working on https://github.com/yogo1212/arch-linux-star64 when I realized I was no longer getting any UART activity from my Star64.
I've tried multiple adapters but had no success.
It was working when I tested my OpenSBI build.

Is there anything that might disable the UART functionality?
Fishwaldo's image still boots and works - just no UART output.

regards :-)