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drm/i915: Check the execlist queue for pending requests before declaring idle 

Including a check against the execlist queue before calling the engine
idle and passing hangcheck.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20170721123238.16428-6-chris@chris-wilson.co.uk
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Chris Wilson 2017-07-21 13:32:24 +01:00 committed by Daniel Vetter
parent 5cce5e31a7
commit d6edb6e3b6
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/i915/intel_engine_cs.c
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@ -1283,6 +1283,10 @@ bool intel_engine_is_idle(struct intel_engine_cs *engine)
if (port_request(&engine->execlist_port[0]))
return false;
/* ELSP is empty, but there are ready requests? */
if (READ_ONCE(engine->execlist_first))
return false;
/* Ring stopped? */
if (!ring_is_idle(engine))
return false;