[PATCH 00/10] Semaphores again. Needs shepherd.

[Ben Widawsky <benjamin.widawsky@intel.com>]

The series is mostly done, but it needs a few last tweaks to make it acceptable
for merge.

Chris noticed that the series doesn't properly work with the new VCS2 code that
Daniel merged a couple of weeks ago. I too noticed this, but was remaining
silent in the hopes that we could actually try to make progress. I raised
concerns about this during the VCS2 merge on IRC. I only took a quick look, and
it seems it's not too bad to implement, but it requires a bit of brain power to
make sure it's correct.

The series is broken in another way because the new semaphore decoding which
Daniel added. Ville posted a fix that looked sane to me, but I haven't a
machine to test with. I'd recommend someone try to beat that into shape and
test it. The series should be /okay/ without that though.

So here are the latest patches that I have. I just don't have enough time
before my vacation to get these things done. They've gone through 5 rounds of
rebase since the first series was posted on 12/13/13. They get the first thumbs
up from Ville on Mar 5 (a couple of minor tweaks were required and could have
been easily done by the maintainer). I've fixed everything I am aware. If
someone could take over the patches, and get them merged, I think it'd really
help in getting this useful feature added to our driver for gen8.

* The last two patches aren't needed, but are here for posterity.

If nobody has taken this over when I return I will see if I can complete it.

Ben Widawsky (10):
  drm/i915: Make semaphore updates more precise
  drm/i915: gen specific ring init
  drm/i915/bdw: implement semaphore signal
  drm/i915/bdw: implement semaphore wait
  drm/i915: Implement MI decode for gen8
  drm/i915: Extract semaphore error collection
  drm/i915/bdw: collect semaphore error state
  drm/i915: semaphore debugfs
  drm/i915/bdw: poll semaphores
  DONT_MERGE drm/i915: FORCE_RESTORE for gen8 semaphores

 drivers/gpu/drm/i915/i915_debugfs.c     |  70 +++++++
 drivers/gpu/drm/i915/i915_drv.h         |   2 +
 drivers/gpu/drm/i915/i915_gem_context.c |   7 +
 drivers/gpu/drm/i915/i915_gpu_error.c   |  79 ++++++--
 drivers/gpu/drm/i915/i915_irq.c         |  11 +-
 drivers/gpu/drm/i915/i915_reg.h         |   8 +-
 drivers/gpu/drm/i915/intel_ringbuffer.c | 342 +++++++++++++++++++++++---------
 drivers/gpu/drm/i915/intel_ringbuffer.h |  78 +++++++-
 8 files changed, 474 insertions(+), 123 deletions(-)

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1.9.2