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

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

The following reply was made to PR kern/56677; it has been noted by GNATS.

From: matthew green <mrg%eterna.com.au@localhost>
To: gnats-bugs%netbsd.org@localhost, oskar%fessel.org@localhost
Cc: kern-bug-people%netbsd.org@localhost, gnats-admin%netbsd.org@localhost,
    netbsd-bugs%netbsd.org@localhost
Subject: re: kern/56677: radeon firmware cannot load with root on zfs 
Date: Sun, 30 Jan 2022 12:27:17 +1100

 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 accelerati=
 on.  =
 
 > 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 (0x=
 CAFEDEAD)
 > 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.