[git pull] i915 fixes

[Chris Wilson <chris@chris-wilson.co.uk>]

Dave, hopefully this completes the regression fixes for .38. There is
still some doubt over eDP, with 011b9910bdaf failing for Jim Gettys but
seeming required for other (currently working in .37) machines. And
despite Linus's intervention, backlight controls are still broken for some
users.

I've taken the conservative approach and disabled GPU semaphores by
default since that prevents one cause of hangs, even though I think it is
fixed by the earlier patch to prevent the FIFO overflow. The other patch
addresses a bug introduced by the combination of relaxed fencing and fence
pipelining infrastructure where to forgot to teardown a bound buffer if it
invalidated its new alignment constraints. Hopefully this will fix the
reported corruption for gen2/3 devices, though there is the possibility of
further underlying bugs.
-Chris

The following changes since commit fb62c00a6d8942775abc23d1621db1252e2d93d1:

  Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client (2011-03-05 10:43:22 -0800)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git drm-intel-fixes

Chris Wilson (4):
      Revert "drm/i915: fix corruptions on i8xx due to relaxed fencing"
      drm/i915: Do not overflow the MMADDR write FIFO
      drm/i915: Disable GPU semaphores by default
      drm/i915: Rebind the buffer if its alignment constraints changes with tiling

 drivers/gpu/drm/i915/i915_debugfs.c        |    4 +-
 drivers/gpu/drm/i915/i915_drv.c            |   17 +++++++++++-
 drivers/gpu/drm/i915/i915_drv.h            |   24 ++++++++++++++----
 drivers/gpu/drm/i915/i915_gem.c            |    2 +-
 drivers/gpu/drm/i915/i915_gem_execbuffer.c |    4 +-
 drivers/gpu/drm/i915/i915_gem_tiling.c     |   37 +++++++++++++--------------
 drivers/gpu/drm/i915/i915_reg.h            |    2 +
 drivers/gpu/drm/i915/intel_display.c       |    8 +++---
 drivers/gpu/drm/i915/intel_ringbuffer.h    |   13 +++++----
 9 files changed, 70 insertions(+), 41 deletions(-)

-- 
Chris Wilson, Intel Open Source Technology Centre