From d6d7df73241ba78a1e41a7ad1c358164e2358867 Mon Sep 17 00:00:00 2001
From: Arpit Singh <arpitks@google.com>
Date: Fri, 7 Mar 2025 11:14:03 +0000
Subject: [CD Cursor] Add DisplayTopologyValidator

Add a DisplayTopologyValidator to verify assumptions made in the
PointerChoreographer and InputDispatcher, some sanity checks on the
topology graph to flag issues realted to topology for debugging.

The validator will be used in the InputManager to validated and discard
invalid topology updates.

Test: atest inputflinger_tests
Bug: 401219231
Flag: com.android.input.flags.enable_display_topology_validation

Change-Id: I624bc32b73144cc047f317ef889f7f07cc1c3dfc
---
 include/input/DisplayTopologyGraph.h | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'include/input')

diff --git a/include/input/DisplayTopologyGraph.h b/include/input/DisplayTopologyGraph.h
index 3ae865a33a..ce7259e09a 100644
--- a/include/input/DisplayTopologyGraph.h
+++ b/include/input/DisplayTopologyGraph.h
@@ -55,6 +55,8 @@ struct DisplayTopologyGraph {
     ui::LogicalDisplayId primaryDisplayId = ui::LogicalDisplayId::INVALID;
     std::unordered_map<ui::LogicalDisplayId, std::vector<DisplayTopologyAdjacentDisplay>> graph;
     std::unordered_map<ui::LogicalDisplayId, int> displaysDensity;
+
+    bool isValid() const;
 };
 
 } // namespace android
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