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- /* SPDX-License-Identifier: MIT */
- #ifndef _DRM_VBLANK_WORK_H_
- #define _DRM_VBLANK_WORK_H_
- #include <linux/kthread.h>
- struct drm_crtc;
- /**
- * struct drm_vblank_work - A delayed work item which delays until a target
- * vblank passes, and then executes at realtime priority outside of IRQ
- * context.
- *
- * See also:
- * drm_vblank_work_schedule()
- * drm_vblank_work_init()
- * drm_vblank_work_cancel_sync()
- * drm_vblank_work_flush()
- */
- struct drm_vblank_work {
- /**
- * @base: The base &kthread_work item which will be executed by
- * &drm_vblank_crtc.worker. Drivers should not interact with this
- * directly, and instead rely on drm_vblank_work_init() to initialize
- * this.
- */
- struct kthread_work base;
- /**
- * @vblank: A pointer to &drm_vblank_crtc this work item belongs to.
- */
- struct drm_vblank_crtc *vblank;
- /**
- * @count: The target vblank this work will execute on. Drivers should
- * not modify this value directly, and instead use
- * drm_vblank_work_schedule()
- */
- u64 count;
- /**
- * @cancelling: The number of drm_vblank_work_cancel_sync() calls that
- * are currently running. A work item cannot be rescheduled until all
- * calls have finished.
- */
- int cancelling;
- /**
- * @node: The position of this work item in
- * &drm_vblank_crtc.pending_work.
- */
- struct list_head node;
- };
- /**
- * to_drm_vblank_work - Retrieve the respective &drm_vblank_work item from a
- * &kthread_work
- * @_work: The &kthread_work embedded inside a &drm_vblank_work
- */
- #define to_drm_vblank_work(_work) \
- container_of((_work), struct drm_vblank_work, base)
- int drm_vblank_work_schedule(struct drm_vblank_work *work,
- u64 count, bool nextonmiss);
- void drm_vblank_work_init(struct drm_vblank_work *work, struct drm_crtc *crtc,
- void (*func)(struct kthread_work *work));
- bool drm_vblank_work_cancel_sync(struct drm_vblank_work *work);
- void drm_vblank_work_flush(struct drm_vblank_work *work);
- #endif /* !_DRM_VBLANK_WORK_H_ */
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