[rebase 1/3] drm: Add drm_vblank_work_flush_all().

[Lucas De Marchi]

what does "rebase" instead of "PATCH" is supposed to mean here?
And then we have a "PATCH v2" as reply to this one.

Shouldn't this go to dri-devel (too)?

Lucas De Marchi

On Thu, Apr 04, 2024 at 12:48:11PM +0200, Maarten Lankhorst wrote:
>From: Maarten Lankhorst <dev at lankhorst.se>
>
>In some cases we want to flush all vblank work, right before vblank_off
>for example. Add a simple function to make this possible.
>
>Signed-off-by: Maarten Lankhorst <dev at lankhorst.se>
>---
> drivers/gpu/drm/drm_vblank_work.c | 22 ++++++++++++++++++++++
> include/drm/drm_vblank_work.h     |  2 ++
> 2 files changed, 24 insertions(+)
>
>diff --git a/drivers/gpu/drm/drm_vblank_work.c b/drivers/gpu/drm/drm_vblank_work.c
>index 43cd5c0f4f6f..ff86f2b2e052 100644
>--- a/drivers/gpu/drm/drm_vblank_work.c
>+++ b/drivers/gpu/drm/drm_vblank_work.c
>@@ -232,6 +232,28 @@ void drm_vblank_work_flush(struct drm_vblank_work *work)
> }
> EXPORT_SYMBOL(drm_vblank_work_flush);
>
>+/**
>+ * drm_vblank_work_flush_all - flush all currently pending vblank work on crtc.
>+ * @crtc: crtc for which vblank work to flush
>+ *
>+ * Wait until all currently queued vblank work on @crtc
>+ * has finished executing once.
>+ */
>+void drm_vblank_work_flush_all(struct drm_crtc *crtc)
>+{
>+	struct drm_device *dev = crtc->dev;
>+	struct drm_vblank_crtc *vblank = &dev->vblank[drm_crtc_index(crtc)];
>+
>+	spin_lock_irq(&dev->event_lock);
>+	wait_event_lock_irq(vblank->work_wait_queue,
>+			    waitqueue_active(&vblank->work_wait_queue),
>+			    dev->event_lock);
>+	spin_unlock_irq(&dev->event_lock);
>+
>+	kthread_flush_worker(vblank->worker);
>+}
>+EXPORT_SYMBOL(drm_vblank_work_flush_all);
>+
> /**
>  * drm_vblank_work_init - initialize a vblank work item
>  * @work: vblank work item
>diff --git a/include/drm/drm_vblank_work.h b/include/drm/drm_vblank_work.h
>index eb41d0810c4f..e04d436b7297 100644
>--- a/include/drm/drm_vblank_work.h
>+++ b/include/drm/drm_vblank_work.h
>@@ -17,6 +17,7 @@ struct drm_crtc;
>  * drm_vblank_work_init()
>  * drm_vblank_work_cancel_sync()
>  * drm_vblank_work_flush()
>+ * drm_vblank_work_flush_all()
>  */
> struct drm_vblank_work {
> 	/**
>@@ -67,5 +68,6 @@ 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);
>+void drm_vblank_work_flush_all(struct drm_crtc *crtc);
>
> #endif /* !_DRM_VBLANK_WORK_H_ */
>-- 
>2.43.0
>