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drm/i915: Wait for engines to idle before retiring

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In the next^W forthcoming patch, we will start to defer retiring the
request from the engine list if it is still active on the submission
backend. To preserve the semantics that after wait-for-idle completes
the system is idle and fully retired, we need to therefore wait for the
backends to idle before calling i915_retire_requests().

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/20180627115334.16282-1-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2018-06-27 12:53:34 +01:00
parent 67ca07e7ac
commit a61b47f672
1 changed files with 7 additions and 4 deletions
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11
drivers/gpu/drm/i915/i915_gem.c
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@ -3810,10 +3810,13 @@ int i915_gem_wait_for_idle(struct drm_i915_private *i915, unsigned int flags)
if (err) if (err)
return err; return err;
} }
err = wait_for_engines(i915);
if (err)
return err;
i915_retire_requests(i915); i915_retire_requests(i915);
GEM_BUG_ON(i915->gt.active_requests); GEM_BUG_ON(i915->gt.active_requests);
return wait_for_engines(i915);
} else { } else {
struct intel_engine_cs *engine; struct intel_engine_cs *engine;
enum intel_engine_id id; enum intel_engine_id id;
@ -3824,9 +3827,9 @@ int i915_gem_wait_for_idle(struct drm_i915_private *i915, unsigned int flags)
if (err) if (err)
return err; return err;
} }
return 0;
} }
return 0;
} }
static void __i915_gem_object_flush_for_display(struct drm_i915_gem_object *obj) static void __i915_gem_object_flush_for_display(struct drm_i915_gem_object *obj)