re: kern/56677: radeon firmware cannot load with root on zfs

[matthew green <mrg%eterna.com.au@localhost>]

this is an entirely separate issue.  can you file a new PR?  thanks.

> When not booting to the ifs root, the card works, but without acceleration.  
> kern info: [drm] ring test on 0 succeeded in 1 usecs
> kern error: [drm:(/hurz/src/sys/external/bsd/drm2/dist/drm/radeon/radeon_r600_dma.c:274)r600_dma_ring_test] *ERROR* radeon: ring 3 test failed (0xCAFEDEAD)
> radeon0: autoconfiguration error: error: disabling GPU acceleration

i see this on a radeon 5450 on a ryzen 5600G system.  fortunately
the CPU is fast enough that mostly i don't notice/care but i've
not figured out what is going wrong -- the test is waiting for a
different value to come from the write, and it never doesn't, but
i don't know anything about how this ring is supposed to work.

what is your CPU/mb/etc?


.mrg.