drm/i915/gem: Almagamate clflushes on suspend

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When flushing objects larger than the CPU cache it is preferrable to use
a single wbinvd() rather than overlapping clflush(). At runtime, we
avoid wbinvd() due to its system-wide latencies, but during
singlethreaded suspend, no one will observe the imposed latency and we
can opt for the faster wbinvd to clear all objects in a single hit.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210119214336.1463-1-chris@chris-wilson.co.uk

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Chris Wilson 2021-01-19 21:43:31 +00:00

parent 95b98f004f

commit ac05a22cd0

1 changed files with 14 additions and 27 deletions

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drivers/gpu/drm/i915/gem/i915_gem_pm.c

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