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