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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2018-02-12 12:39:28 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2018-02-12 13:59:01 +0300 |
| commit | 74d00d28a15c8452f65de0a9477b52d95639cc63 (patch) | |
| tree | c62b04e9873b34c1e93bc72a07e2091f467a1ff8 /drivers/gpu | |
| parent | ad5169070713cee0be9f533a8f39b2903b7833d8 (diff) | |
| download | linux-74d00d28a15c8452f65de0a9477b52d95639cc63.tar.xz | |
drm/i915: Don't wake the device up to check if the engine is asleep
If the entire device is powered off, we can safely assume that the
engine is also asleep (and idle).
Reported-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Fixes: a091d4ee931b ("drm/i915: Hold a wakeref for probing the ring registers")
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/20180212093928.6005-1-chris@chris-wilson.co.uk
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_engine_cs.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/intel_engine_cs.c b/drivers/gpu/drm/i915/intel_engine_cs.c index 0ad9184eba97..3efc589a7f37 100644 --- a/drivers/gpu/drm/i915/intel_engine_cs.c +++ b/drivers/gpu/drm/i915/intel_engine_cs.c @@ -1464,7 +1464,9 @@ static bool ring_is_idle(struct intel_engine_cs *engine) struct drm_i915_private *dev_priv = engine->i915; bool idle = true; - intel_runtime_pm_get(dev_priv); + /* If the whole device is asleep, the engine must be idle */ + if (!intel_runtime_pm_get_if_in_use(dev_priv)) + return true; /* First check that no commands are left in the ring */ if ((I915_READ_HEAD(engine) & HEAD_ADDR) != |