pp reset timeout with runtime pm enabled

On s905 platform (odroid-c2) with the runtime pm patchset applied (linux 5.8.0-rc5), I'm hitting this while attempting to run anything, like kmscube:

[  140.276781] lima d00c0000.gpu: pp pp0 reset time out
[  140.277003] lima d00c0000.gpu: pp pp1 reset time out
[  140.281227] lima d00c0000.gpu: pp pp2 reset time out

I bisected it to 50de2e9ebbc0 drm/lima: enable runtime pm.

Despite the log, I don't notice graphical glitches.

Disabling it with:

# echo -1 > /sys/devices/platform/soc/d0000000.apb/d00c0000.gpu/power/autosuspend_delay_ms

also works around the issue.