diff options
| author | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2024-05-22 07:33:39 +0200 |
|---|---|---|
| committer | Maarten Lankhorst <maarten.lankhorst@linux.intel.com> | 2024-06-24 18:03:18 +0200 |
| commit | 12f84e8793af19357e2270b24b9e8d453bb3a1f2 (patch) | |
| tree | 660fabc2972b1d71ca5d0f5e632eb33f1a5269e5 | |
| parent | f8fa26f4e09230137a304a5275d2633a6de11c7d (diff) | |
drm: Add drm_vblank_work_flush_all().
In some cases we want to flush all vblank work, right before vblank_off
for example. Add a simple function to make this possible.
Check that both pending_work and running work are empty when flushing.
Co-Developed-by: Chaitanya Kumar Borah <chaitanya.kumar.borah@intel.com>
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240522053341.137592-2-maarten.lankhorst@linux.intel.com
| -rw-r--r-- | drivers/gpu/drm/drm_vblank_work.c | 22 | ||||
| -rw-r--r-- | include/drm/drm_vblank_work.h | 2 |
2 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_vblank_work.c b/drivers/gpu/drm/drm_vblank_work.c index 4fe9b1d3b00f..1752ffb44e1d 100644 --- a/drivers/gpu/drm/drm_vblank_work.c +++ b/drivers/gpu/drm/drm_vblank_work.c @@ -233,6 +233,28 @@ 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, + list_empty(&vblank->pending_work), + 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 * @crtc: CRTC whose vblank will trigger the work execution 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_ */ |