commit 8f1ee7fdcf5c602aa87a93b727a696bb8e9eddb0
author Ady Abraham <adyabr@google.com> Fri Apr 05 10:32:50 2019 -0700
committer Ady Abraham <adyabr@google.com> Mon Apr 08 11:01:12 2019 -0700
tree 6674593c7df2539979ca549d7802783caf24d1e4
parent 09bd3920155f0961b303d1cdd0f6027135aff36d

SurfaceFlinger: handle wallpaper scenario in Scheduler

Use the fact that a layer contains wallpaper in Scheduler's
algorithm when picking a refresh rate. Wallpaper should be presented
in the lowest active refresh rate to preserve power.

Test: systrace during wallpaper
Bug: 124065567
Change-Id: Ibb18e62eaf1a6b9b3ab1ec18a3135fb17c8f57fc

services/surfaceflinger/Layer.cpp

diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index de05f74..b47497a 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -70,7 +70,10 @@
 std::atomic<int32_t> Layer::sSequence{1};
 
 Layer::Layer(const LayerCreationArgs& args)
-      : mFlinger(args.flinger), mName(args.name), mClientRef(args.client) {
+      : mFlinger(args.flinger),
+        mName(args.name),
+        mClientRef(args.client),
+        mWindowType(args.metadata.getInt32(METADATA_WINDOW_TYPE, 0)) {
     mCurrentCrop.makeInvalid();
 
     uint32_t layerFlags = 0;
@@ -115,7 +118,7 @@
     mFrameEventHistory.initializeCompositorTiming(compositorTiming);
     mFrameTracker.setDisplayRefreshPeriod(compositorTiming.interval);
 
-    mSchedulerLayerHandle = mFlinger->mScheduler->registerLayer(mName.c_str());
+    mSchedulerLayerHandle = mFlinger->mScheduler->registerLayer(mName.c_str(), mWindowType);
 
     mFlinger->onLayerCreated();
 }
@@ -1300,6 +1303,7 @@
     result.append("-----------------------------\n");
     result.append(" Layer name\n");
     result.append("           Z | ");
+    result.append(" Window Type | ");
     result.append(" Comp Type | ");
     result.append(" Transform | ");
     result.append("  Disp Frame (LTRB) | ");
@@ -1336,6 +1340,7 @@
     } else {
         StringAppendF(&result, "  %10d | ", layerState.z);
     }
+    StringAppendF(&result, "  %10d | ", mWindowType);
     StringAppendF(&result, "%10s | ", toString(getCompositionType(displayDevice)).c_str());
     StringAppendF(&result, "%10s | ",
                   toString(getCompositionLayer() ? compositionState.bufferTransform