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| author | Chris Wilson <chris@chris-wilson.co.uk> | 2019-06-26 16:45:47 +0100 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2019-06-26 18:01:01 +0100 |
| commit | de5147b8ce6d51f634661d7c531385371485cec6 (patch) | |
| tree | bda808e8a9e1a3617f4252556629346f024ea083 /drivers/gpu/drm/i915/intel_wakeref.h | |
| parent | 7d23e59376039d08728444cf05b2db6f7b86ff22 (diff) | |
| download | linux-de5147b8ce6d51f634661d7c531385371485cec6.tar.gz | |
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
Diffstat (limited to 'drivers/gpu/drm/i915/intel_wakeref.h')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_wakeref.h | 15 |
1 files changed, 15 insertions, 0 deletions
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 |