diff options
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index e031d82381e5..990f065374b2 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -4991,9 +4991,7 @@ static void do_intel_finish_page_flip(struct drm_device *dev, spin_unlock_irqrestore(&dev->event_lock, flags); - obj_priv = to_intel_bo(work->pending_flip_obj); - - /* Initial scanout buffer will have a 0 pending flip count */ + obj_priv = to_intel_bo(work->old_fb_obj); atomic_clear_mask(1 << intel_crtc->plane, &obj_priv->pending_flip.counter); if (atomic_read(&obj_priv->pending_flip) == 0) @@ -5092,9 +5090,14 @@ static int intel_crtc_page_flip(struct drm_crtc *crtc, if (ret) goto cleanup_objs; - obj_priv = to_intel_bo(obj); - atomic_add(1 << intel_crtc->plane, &obj_priv->pending_flip); + /* Block clients from rendering to the new back buffer until + * the flip occurs and the object is no longer visible. + */ + atomic_add(1 << intel_crtc->plane, + &to_intel_bo(work->old_fb_obj)->pending_flip); + work->pending_flip_obj = obj; + obj_priv = to_intel_bo(obj); if (IS_GEN3(dev) || IS_GEN2(dev)) { u32 flip_mask; |