Here's a series to re-add GPU reset, which I cut out of the driver in 8483d152db61c5baf5452b844ef65b96ee9a6cfb to deal with a build regression. Along the way, I found a bug in hang detection that seemed to be exacerbated by runtime PM.
My preference would be to get this in -fixes, since without GPU reset we can end up with a totally wedged desktop (and we do still have some known GPU hangs). If not, I'm fine with the first patch to -fixes and the other two to -next.
Eric Anholt (3): drm/vc4: Fix spurious GPU resets due to BO reuse. drm/vc4: Enable runtime PM. drm/vc4: Use runtime PM to power cycle the device when the GPU hangs.
drivers/gpu/drm/vc4/vc4_drv.h | 13 +++++++++-- drivers/gpu/drm/vc4/vc4_gem.c | 51 ++++++++++++++++++++++++++++++++++++------- drivers/gpu/drm/vc4/vc4_v3d.c | 48 ++++++++++++++++++++++++++++++---------- 3 files changed, 90 insertions(+), 22 deletions(-)