From: Ville Syrjälä ville.syrjala@linux.intel.com
Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com --- drivers/gpu/drm/i915/intel_atomic.c | 36 +++++++++++++++++++++++++++++++++++ 1 files changed, 36 insertions(+), 0 deletions(-)
diff --git a/drivers/gpu/drm/i915/intel_atomic.c b/drivers/gpu/drm/i915/intel_atomic.c index e52d92a..36446d1 100644 --- a/drivers/gpu/drm/i915/intel_atomic.c +++ b/drivers/gpu/drm/i915/intel_atomic.c @@ -2471,9 +2471,23 @@ void intel_atomic_handle_vblank(struct drm_device *dev, int pipe) void intel_atomic_clear_flips(struct drm_crtc *crtc) { struct drm_device *dev = crtc->dev; + struct drm_i915_private *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = to_intel_crtc(crtc); struct intel_plane *intel_plane; + struct intel_flip *intel_flip, *next; int pipe = intel_crtc->pipe; + unsigned long flags; + LIST_HEAD(flips); + + /* + * If there are flips still waiting for the GPU, remove them + * from the list, so that they won't be able to move over to + * drm_flip_helpers' possession after we've called + * drm_flip_helper_clear(). + */ + spin_lock_irqsave(&dev_priv->flip.lock, flags); + list_cut_position(&flips, &dev_priv->flip.list, dev_priv->flip.list.prev); + spin_unlock_irqrestore(&dev_priv->flip.lock, flags);
drm_flip_helper_clear(&intel_crtc->flip_helper);
@@ -2481,4 +2495,26 @@ void intel_atomic_clear_flips(struct drm_crtc *crtc) if (intel_plane->pipe == pipe) drm_flip_helper_clear(&intel_plane->flip_helper); } + + /* + * Drop all non-ready flips. Doing this after calling + * drm_flip_helper_clear() maintaines the correct order + * of completion events. + */ + list_for_each_entry_safe(intel_flip, next, &flips, base.list) { + struct intel_ring_buffer *ring = intel_flip->ring; + + if (ring) { + intel_flip->ring = NULL; + ring->irq_put(ring); + } + + intel_flip_complete(&intel_flip->base); + /* + * FIXME drm_flip_helper calls the following functions + * from a workqueue. Perhaps we should do the same here? + */ + intel_flip_finish(&intel_flip->base); + intel_flip_cleanup(&intel_flip->base); + } }