diff options
| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-06-26 18:45:47 +0300 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-06-26 20:01:01 +0300 |
| commit | de5147b8ce6d51f634661d7c531385371485cec6 (patch) | |
| tree | bda808e8a9e1a3617f4252556629346f024ea083 | |
| parent | 7d23e59376039d08728444cf05b2db6f7b86ff22 (diff) | |
| download | linux-de5147b8ce6d51f634661d7c531385371485cec6.tar.xz | |
drm/i915: Add a wakeref getter for iff the wakeref is already active
For use in the next patch, we want to acquire a wakeref without having
to wake the device up -- i.e. only acquire the engine wakeref if the
engine is already active.
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190626154549.10066-1-chris@chris-wilson.co.uk
| -rw-r--r-- | drivers/gpu/drm/i915/gt/intel_engine_pm.h | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_wakeref.h | 15 |
2 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/i915/gt/intel_engine_pm.h b/drivers/gpu/drm/i915/gt/intel_engine_pm.h index f3f5b031b4a1..7d057cdcd919 100644 --- a/drivers/gpu/drm/i915/gt/intel_engine_pm.h +++ b/drivers/gpu/drm/i915/gt/intel_engine_pm.h @@ -11,7 +11,6 @@ #include "intel_wakeref.h" struct drm_i915_private; -struct intel_engine_cs; void intel_engine_pm_get(struct intel_engine_cs *engine); void intel_engine_pm_put(struct intel_engine_cs *engine); @@ -22,6 +21,12 @@ intel_engine_pm_is_awake(const struct intel_engine_cs *engine) return intel_wakeref_is_active(&engine->wakeref); } +static inline bool +intel_engine_pm_get_if_awake(struct intel_engine_cs *engine) +{ + return intel_wakeref_get_if_active(&engine->wakeref); +} + void intel_engine_park(struct intel_engine_cs *engine); void intel_engine_init__pm(struct intel_engine_cs *engine); diff --git a/drivers/gpu/drm/i915/intel_wakeref.h b/drivers/gpu/drm/i915/intel_wakeref.h index f74272770a5c..1d6f5986e4e5 100644 --- a/drivers/gpu/drm/i915/intel_wakeref.h +++ b/drivers/gpu/drm/i915/intel_wakeref.h @@ -72,6 +72,21 @@ intel_wakeref_get(struct intel_runtime_pm *rpm, } /** + * intel_wakeref_get_if_in_use: Acquire the wakeref + * @wf: the wakeref + * + * Acquire a hold on the wakeref, but only if the wakeref is already + * active. + * + * Returns: true if the wakeref was acquired, false otherwise. + */ +static inline bool +intel_wakeref_get_if_active(struct intel_wakeref *wf) +{ + return atomic_inc_not_zero(&wf->count); +} + +/** * intel_wakeref_put: Release the wakeref * @i915: the drm_i915_private device * @wf: the wakeref |