SurfaceFlinger: Emit callbacks for non-buffer layer transactions

Ensure we emit callbacks if the transaction contains only non-buffer
layer state changes.

Test: atest SurfaceFlinger_test
Fixes: 205183085
Change-Id: I56bf0dcaff4312628fe2cd1d0b93db520518ec54

1 files changed, 11 insertions, 0 deletions

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index d68cf9720f..d8854d3033 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -2645,6 +2645,17 @@ bool Layer::setDropInputMode(gui::DropInputMode mode) {
     return true;
 }
 
+bool Layer::setTransactionCompletedListeners(
+        const std::vector<ListenerCallbacks>& listenerCallbacks, const sp<IBinder>&) {
+    if (listenerCallbacks.empty()) {
+        return false;
+    }
+    for (auto& listener : listenerCallbacks) {
+        mFlinger->getTransactionCallbackInvoker().addEmptyCallback(listener);
+    }
+    return false;
+}
+
 // ---------------------------------------------------------------------------
 
 std::ostream& operator<<(std::ostream& stream, const Layer::FrameRate& rate) {