This trims a little overhead from the common case of not needing to
synchronize between rings.
Signed-off-by: Chris Wilson <ch...@chris-wilson.co.uk>
---
drivers/gpu/drm/i915/i915_gem_execbuffer.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
index bd7b7ec5c184..1eda0bdc5eab 100644
--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -909,9 +909,12 @@ i915_gem_execbuffer_move_to_gpu(struct intel_engine_cs
*ring,
list_for_each_entry(vma, vmas, exec_list) {
struct drm_i915_gem_object *obj = vma->obj;
- ret = i915_gem_object_sync(obj, ring);
- if (ret)
- return ret;
+
+ if (obj->active & ~intel_ring_flag(ring)) {
+ ret = i915_gem_object_sync(obj, ring);
+ if (ret)
+ return ret;
+ }
if (obj->base.write_domain & I915_GEM_DOMAIN_CPU)
flush_chipset |= i915_gem_clflush_object(obj, false);
--
2.1.4
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