I finally managed to get panel working on the Xiaomi 12. I would like to curse at Qualcomm for the mistake I had in my panel driver for the last year, because it was not obvious at all. Anyways, time to get SM8450 working in all its glory from here! So much is already done :D
I made #PostmarketOS boot on PowerPC! And discovered a bunch of bugs in pmb v3 and a circular dependency on the way here. If it weren't so late I'd build some GUI as well, but that's for another day.
Xiaomi Mi Smart Clock (x04g) bootloader unlocking, UART soldering and mainline boot attempts :D
Credits to:
@npub19wj8...g8gs for soldering the UART
@npub164g6...k0lj for fighting mediatek's bootloader