drm/i915/gt: Use caller provided forcewake for intel_mocs_init_engine
authorChris Wilson <chris@chris-wilson.co.uk>
Wed, 3 Jul 2019 15:52:23 +0000 (16:52 +0100)
committerChris Wilson <chris@chris-wilson.co.uk>
Thu, 4 Jul 2019 13:42:38 +0000 (14:42 +0100)
commit56e0f78e47e47795873acbabab443029aa30bcb4
tree461b8e4a1d95084763c921116c74071246fc617b
parentb7dc9395c5db2748aac24704d3f2d96f34f90f07
drm/i915/gt: Use caller provided forcewake for intel_mocs_init_engine

During post-reset resume, we call intel_mocs_init_engine to reinitialise
the MOCS registers. Suprisingly, especially when enhanced by lockdep,
the acquisition of the forcewake lock around each register write takes a
substantial portion of the reset time. We don't need to use the
individual forcewake here as we can assume that the caller is holding a
blanket forcewake for the reset&resume and the resume is serialised.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190703155225.9501-2-chris@chris-wilson.co.uk
drivers/gpu/drm/i915/gt/intel_mocs.c