[Intel-gfx] [PATCH 3/3] drm/i915: Pipeline PDP updates for Braswell

[Chris Wilson]

Quoting Tvrtko Ursulin (2018-12-07 10:30:53)
> Is BSW fixed now? Or just a tiny bit better?

For some value of a lot better. gem_concurrent_blit is still getting the
odd false-positive missed-breadcrumb report, the occasional incoherency
(I think is insufficient mb around fence register changes) and a rare
invalid TLB GPU hang (EMIT_INVALIDATE harder?).

On the positive side, the machine hasn't died for a few days (the
LRI forcewake errors kill the machine), and at its worst
gem_concurrent_blit could GPU hang within a few seconds. However, not
once have I been able to reproduce the GPU hangs with gem_ctx_create and
friends as seen by CI, so more than likely we are looking at more than
one problem. Fingers crossed this is sufficient to shut CI up (with the
exception of those rare gem_mmap_gtt incoherency failures).
-Chris