drm_hwcomposer: Add support for IN_FENCE_FD property to DrmPlane

Add support for the IN_FENCE_FD property to DrmPlane.

Signed-off-by: Robert Foss <robert.foss@collabora.com>
Reviewed-by: Sean Paul <seanpaul@chromium.org>
diff --git a/drmplane.cpp b/drmplane.cpp
index c4ea722..1f739ae 100644
--- a/drmplane.cpp
+++ b/drmplane.cpp
@@ -126,6 +126,10 @@
   if (ret)
     ALOGI("Could not get alpha property");
 
+  ret = drm_->GetPlaneProperty(*this, "IN_FENCE_FD", &in_fence_fd_property_);
+  if (ret)
+    ALOGI("Could not get IN_FENCE_FD property");
+
   return 0;
 }
 
@@ -188,4 +192,8 @@
 const DrmProperty &DrmPlane::alpha_property() const {
   return alpha_property_;
 }
+
+const DrmProperty &DrmPlane::in_fence_fd_property() const {
+  return in_fence_fd_property_;
+}
 }