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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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