[PATCH 0/1] [Jaunty] LP#314928 -- AGP aperture MTRR for Intel i915 family

[Andy Whitcroft]

We have been seeing a number of bugs relating to Intel graphics
performance.  Rather than being one single bug this seems to be a slew
of little problems each chipping away at the overall speed.  One such
problem is the MTRR marking the AGP aperture as write-combining is missing.
Particularly when tiling is enabled, this has a significant performance
impact.  Noticible visually in combiz effects, and even causing tearing on
video playback for some users.

Fixes things up for me, and reported to fix testers on the bug.

Proposing for SRU to Jaunty.

-apw

Eric Anholt (1):
  UBUNTU: SAUCE: drm/i915: Set up an MTRR covering the GTT at driver
    load.

 drivers/gpu/drm/i915/i915_dma.c |   24 ++++++++++++++++++++++++
 drivers/gpu/drm/i915/i915_drv.h |    1 +
 drivers/gpu/drm/i915/i915_gem.c |    6 ------
 3 files changed, 25 insertions(+), 6 deletions(-)