Using WAIT is preferrable to SET_DOMAIN as it doesn't have
any domain management side-effects - but has the same flushing
semantics.
Signed-off-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
intel/intel_bufmgr_gem.c | 18 ++++++++++++++++++
1 file changed, 18 insertions(+)
diff --git a/intel/intel_bufmgr_gem.c b/intel/intel_bufmgr_gem.c
index ecbf8ee..a938441 100644
--- a/intel/intel_bufmgr_gem.c
+++ b/intel/intel_bufmgr_gem.c
@@ -1740,6 +1740,24 @@ drm_intel_gem_bo_get_subdata(drm_intel_bo *bo, unsigned long offset,
static void
drm_intel_gem_bo_wait_rendering(drm_intel_bo *bo)
{
+ drm_intel_bufmgr_gem *bufmgr_gem = (drm_intel_bufmgr_gem *) bo->bufmgr;
+
+ /* Using WAIT is preferrable to SET_DOMAIN as it doesn't have
+ * any domain management side-effects - but has the same flushing
+ * semantics.
+ */
+ if (bufmgr_gem->has_wait_timeout) {
+ struct drm_i915_gem_wait wait;
+
+ memclear(wait);
+ wait.bo_handle = bo->handle;
+ wait.timeout_ns = -1;
+ if (drmIoctl(bufmgr_gem->fd,
+ DRM_IOCTL_I915_GEM_WAIT,
+ &wait) == 0)
+ return;
+ }
+
drm_intel_gem_bo_start_gtt_access(bo, 1);
}
--
2.1.4
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