Hi,
I'm observing nouveau not initializing recently on linux-next on my Tegra186 Jetson TX2 board. Specifically it looks like BO allocation is failing when initializing the sync subsystem:
[ 21.858149] nouveau 17000000.gpu: DRM: failed to initialise sync subsystem, -28
I have been bisecting and I have found two patches that affect this. Firstly, things first break on
d02117f8efaa drm/ttm: remove special handling for non GEM drivers
starting to return error code -12. Then, at
d79025c7f5e3 drm/ttm: always initialize the full ttm_resource v2
the error code changes to the above -28.
If I checkout one commit prior to d79025c7f5e3 and revert d02117f8efaa, things work again. There are a bunch of other TTM commits between this and HEAD, so reverting these on top of HEAD doesn't work. However, I checked that both yesterday's and today's nexts are also broken.
Thank you, Mikko