1 files changed, 29 insertions, 0 deletions
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 64cfb3d699..3765d0d39d 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -993,6 +993,9 @@ uint32_t Layer::doTransaction(uint32_t flags) {
     commitTransaction(c);
     mPendingStatesSnapshot = mPendingStates;
     mCurrentState.callbackHandles = {};
+
+    maybeDirtyInput();
+
     return flags;
 }
 
@@ -2472,6 +2475,32 @@ Layer::FrameRateCompatibility Layer::FrameRate::convertCompatibility(int8_t comp
     }
 }
 
+bool Layer::maybeDirtyInput() {
+    // No sense redirtying input.
+    if (mFlinger->inputDirty()) return true;
+
+    if (hasInput()) {
+        mFlinger->dirtyInput();
+        return true;
+    }
+
+    // If a child or relative dirties the input, no sense continuing to traverse
+    // so we return early and halt the recursion. We traverse ourselves instead
+    // of using traverse() so we can implement this early halt.
+    for (const sp<Layer>& child : mDrawingChildren) {
+        if (child->maybeDirtyInput()) {
+            return true;
+        }
+    }
+    for (const wp<Layer>& weakRelative : mDrawingState.zOrderRelatives) {
+        sp<Layer> relative = weakRelative.promote();
+        if (relative && relative->maybeDirtyInput()) {
+            return true;
+        }
+    }
+    return false;
+}
+
 // ---------------------------------------------------------------------------
 
 }; // namespace android