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71 lines
1.9 KiB
71 lines
1.9 KiB
/* 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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