drm/i915: Extend intel_wakeref to support delayed puts

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In some cases we want to hold onto the wakeref for a little after the
last user so that we can avoid having to drop and then immediately
reacquire it. Allow the last user to specify if they would like to keep
the wakeref alive for a short hysteresis.

v2: Embrace bitfield.h for adjustable flags.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200323103221.14444-1-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2020-03-23 10:32:21 +00:00

parent 45d4173994

commit e9037e7f9a

4 changed files with 33 additions and 9 deletions

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6

drivers/gpu/drm/i915/gt/intel_engine_pm.h

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2

drivers/gpu/drm/i915/gt/intel_gt_requests.c

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12

drivers/gpu/drm/i915/intel_wakeref.c

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22

drivers/gpu/drm/i915/intel_wakeref.h

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