[Intel-gfx] [PATCH v2 19/21] Reapply "drm/i915: Avoid stalling on pending flips for legacy cursor updates"

[Maarten Lankhorst]

This reapplies commit acf4e84d6167317ff21be5c03e1ea76ea5783701.
With async unpin this should no longer break.

Signed-off-by: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 16d8e299994d..9236407e9b13 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12930,12 +12930,14 @@ static int intel_atomic_prepare_commit(struct drm_device *dev,
 		struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 		struct intel_flip_work *work;
 
-		ret = intel_crtc_wait_for_pending_flips(crtc);
-		if (ret)
-			return ret;
+		if (!state->legacy_cursor_update) {
+			ret = intel_crtc_wait_for_pending_flips(crtc);
+			if (ret)
+				return ret;
 
-		if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
-			flush_workqueue(dev_priv->wq);
+			if (atomic_read(&intel_crtc->unpin_work_count) >= 2)
+				flush_workqueue(dev_priv->wq);
+		}
 
 		/* test if we need to update something */
 		if (!needs_work(crtc_state))
-- 
2.5.5