drm/i915/intel_wakeref.h

2  * SPDX-License-Identifier: MIT
74  * Note that @fn is allowed to fail, in which case the runtime-pm wakeref
84 	if (unlikely(!atomic_inc_not_zero(&wf->count)))  in intel_wakeref_get()
102 	INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0);  in __intel_wakeref_get()
103 	atomic_inc(&wf->count);  in __intel_wakeref_get()
118 	return atomic_inc_not_zero(&wf->count);  in intel_wakeref_get_if_active()
135  * Note that @fn is allowed to fail, in which case the runtime-pm wakeref
145 	GENMASK(BITS_PER_LONG - 1, __INTEL_WAKEREF_PUT_LAST_BIT__)  in __intel_wakeref_put()
147 	INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count) <= 0);  in __intel_wakeref_put()
148 	if (unlikely(!atomic_add_unless(&wf->count, -1, 1)))  in __intel_wakeref_put()
166 intel_wakeref_put_delay(struct intel_wakeref *wf, unsigned long delay)  in intel_wakeref_put_delay()  argument
170 			    FIELD_PREP(INTEL_WAKEREF_PUT_DELAY, delay));  in intel_wakeref_put_delay()
183 	__acquires(wf->mutex)  in intel_wakeref_lock()
185 	mutex_lock(&wf->mutex);  in intel_wakeref_lock()
196 	__releases(wf->mutex)  in intel_wakeref_unlock()
198 	mutex_unlock(&wf->mutex);  in intel_wakeref_unlock()
205  * Waits for the active callback (under the @wf->mutex or another CPU) is
211 	mutex_lock(&wf->mutex);  in intel_wakeref_unlock_wait()
212 	mutex_unlock(&wf->mutex);  in intel_wakeref_unlock_wait()
213 	flush_delayed_work(&wf->work);  in intel_wakeref_unlock_wait()
225 	return READ_ONCE(wf->wakeref);  in intel_wakeref_is_active()
235 	lockdep_assert_held(&wf->mutex);  in __intel_wakeref_defer_park()
236 	INTEL_WAKEREF_BUG_ON(atomic_read(&wf->count));  in __intel_wakeref_defer_park()
237 	atomic_set_release(&wf->count, 1);  in __intel_wakeref_defer_park()
262  * intel_wakeref_auto: Delay the runtime-pm autosuspend
266  * The runtime-pm core uses a suspend delay after the last wakeref
268  * delay is configurable via sysfs with little regard to the device
269  * characteristics. Instead, we want to tune the autosuspend based on our
273  * Pass @timeout = 0 to cancel a previous autosuspend by executing the