drm/i915: Don't do MTRR setup if PAT is enabled

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Some newer BIOSes are shipping with all MTRRs already populated.  These
BIOSes are all on machines with sufficiently new CPUs that the
referenced errata doesn't apply anyway, so just don't try to claim the
MTRR.

Signed-off-by: Adam Jackson <ajax@redhat.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=41648
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Adam Jackson 2012-03-14 11:22:11 -04:00 • committed by Daniel Vetter

parent e2b665c480

commit 9e984bc1df

1 changed files with 6 additions and 0 deletions

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drivers/gpu/drm/i915/i915_dma.c

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