diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index 068424b..2c90c92 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -94,7 +94,16 @@
 
 class Layer : public virtual RefBase, compositionengine::LayerFE {
     static std::atomic<int32_t> sSequence;
+    // The following constants represent priority of the window. SF uses this information when
+    // deciding which window has a priority when deciding about the refresh rate of the screen.
+    // Priority 0 is considered the highest priority. -1 means that the priority is unset.
     static constexpr int32_t PRIORITY_UNSET = -1;
+    // Windows that are in focus and voted for the preferred mode ID
+    static constexpr int32_t PRIORITY_FOCUSED_WITH_MODE = 0;
+    // // Windows that are in focus, but have not requested a specific mode ID.
+    static constexpr int32_t PRIORITY_FOCUSED_WITHOUT_MODE = 1;
+    // Windows that are not in focus, but voted for a specific mode ID.
+    static constexpr int32_t PRIORITY_NOT_FOCUSED_WITH_MODE = 2;
 
 public:
     mutable bool contentDirty{false};
@@ -400,6 +409,7 @@
     //  If the variable is not set on the layer, it traverses up the tree to inherit the frame
     //  rate priority from its parent.
     virtual int32_t getFrameRateSelectionPriority() const;
+    static bool isLayerFocusedBasedOnPriority(int32_t priority);
 
     virtual ui::Dataspace getDataSpace() const { return ui::Dataspace::UNKNOWN; }