commit b0f458286d0c2c48bde483ff1664906dea79df97
author Alec Mouri <alecmouri@google.com> Mon May 06 11:01:35 2019 -0700
committer Alec Mouri <alecmouri@google.com> Mon May 06 11:01:35 2019 -0700
tree 2bc54d4b18700dee578c539083246a8ed9e52dd2
parent e6f6a7c4d74c967c4ea38f2f6b7c68f9260c952c

Always enable backpressure propagation during GPU composition

Change I54f1bd6074e27fb6e00d8397a704fc1d5f1ddd35 relaxed the condition
enabling backpressure propagation to be in all cases where device
composition was performed. This change re-tightens that condition so
that propagation is never enabled when GPU composition is performed.

Bug: 131134223
Test: systrace
Change-Id: If89aae62dc362ca0e471439a26c211acca5184f1

services/surfaceflinger/SurfaceFlinger.cpp

diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index fc0d5fc..bac5bf0 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1632,7 +1632,7 @@
             }
 
             // For now, only propagate backpressure when missing a hwc frame.
-            if (hwcFrameMissed) {
+            if (hwcFrameMissed && !gpuFrameMissed) {
                 if (mPropagateBackpressure) {
                     signalLayerUpdate();
                     break;