drm/i915: Hold rpm wakeref for printing the engine's register state

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When dumping the engine, we print out the current register values. This
requires the rpm wakeref. If the device is alseep, we can assume the
engine is asleep (and the register state is uninteresting) so skip and
only acquire the rpm wakeref if the device is already awake.

Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180212102415.24246-1-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2018-02-12 10:24:15 +00:00

parent 74d00d28a1

commit 3ceda3a4a8

2 changed files with 94 additions and 74 deletions

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162

drivers/gpu/drm/i915/intel_engine_cs.c

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6

drivers/gpu/drm/i915/intel_ringbuffer.h

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