iris: Make a iris_batch_reference_signal_syncpt helper function.

Suggested by Chris Wilson.  More obvious what's going on.

1 files changed, 18 insertions, 0 deletions

diff --git a/src/gallium/drivers/iris/iris_batch.h b/src/gallium/drivers/iris/iris_batch.h
index d398c3c473e..3dd33663f11 100644
--- a/src/gallium/drivers/iris/iris_batch.h
+++ b/src/gallium/drivers/iris/iris_batch.h
@@ -33,6 +33,8 @@
 #include "i915_drm.h"
 #include "common/gen_decoder.h"
 
+#include "iris_fence.h"
+
 /* The kernel assumes batchbuffers are smaller than 256kB. */
 #define MAX_BATCH_SIZE (256 * 1024)
 
@@ -193,4 +195,20 @@ iris_batch_emit(struct iris_batch *batch, const void *data, unsigned size)
    memcpy(map, data, size);
 }
 
+/**
+ * Take a reference to the batch's signalling syncpt.
+ *
+ * Callers can use this to wait for the the current batch under construction
+ * to complete (after flushing it).
+ */
+static inline void
+iris_batch_reference_signal_syncpt(struct iris_batch *batch,
+                                   struct iris_syncpt **out_syncpt)
+{
+   /* The signalling syncpt is the first one in the list. */
+   struct iris_syncpt *syncpt =
+      ((struct iris_syncpt **) util_dynarray_begin(&batch->syncpts))[0];
+   iris_syncpt_reference(batch->screen, out_syncpt, syncpt);
+}
+
 #endif