drm_hwcomposer: only check the composition after a geometry change

Do not check the composition with kernel for every frame. We are currently
using synchronous atomic ioctl calls, so all test-only calls are serialized
with the actual commits.

BUG=25866352
TEST=same test procedure as crosbug.com/p/47206

Change-Id: Ia423243c279fc677ff6213115a8f20efa40c235e

1 files changed, 5 insertions, 1 deletions

diff --git a/drmdisplaycomposition.h b/drmdisplaycomposition.h
index 9be5fdd..3c94e6b 100644
--- a/drmdisplaycomposition.h
+++ b/drmdisplaycomposition.h
@@ -17,8 +17,8 @@
 #ifndef ANDROID_DRM_DISPLAY_COMPOSITION_H_
 #define ANDROID_DRM_DISPLAY_COMPOSITION_H_
 
-#include "drmhwcomposer.h"
 #include "drmcrtc.h"
+#include "drmhwcomposer.h"
 #include "drmplane.h"
 #include "glworker.h"
 #include "importer.h"
@@ -100,6 +100,10 @@ class DrmDisplayComposition {
     return composition_planes_;
   }
 
+  bool geometry_changed() const {
+    return geometry_changed_;
+  }
+
   uint64_t frame_no() const {
     return frame_no_;
   }