Merge changes I7c51f161,I9231f4b4

* changes:
  SF: Remove LayerBE
  SF: Refactor onLayerDisplayed
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index 3304fd1..9bf499b 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -134,7 +134,6 @@
         "EventLog/EventLog.cpp",
         "FrameTracker.cpp",
         "Layer.cpp",
-        "LayerBE.cpp",
         "LayerProtoHelper.cpp",
         "LayerRejecter.cpp",
         "LayerStats.cpp",
diff --git a/services/surfaceflinger/BufferQueueLayer.cpp b/services/surfaceflinger/BufferQueueLayer.cpp
index 96c4992..215dea1 100644
--- a/services/surfaceflinger/BufferQueueLayer.cpp
+++ b/services/surfaceflinger/BufferQueueLayer.cpp
@@ -199,7 +199,6 @@
     bool sidebandStreamChanged = true;
     if (mSidebandStreamChanged.compare_exchange_strong(sidebandStreamChanged, false)) {
         // mSidebandStreamChanged was changed to false
-        // replicated in LayerBE until FE/BE is ready to be synchronized
         auto& layerCompositionState = getCompositionLayer()->editState().frontEnd;
         layerCompositionState.sidebandStream = mConsumer->getSidebandStream();
         if (layerCompositionState.sidebandStream != nullptr) {
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFE.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFE.h
index f9a3624..6cc87ba 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFE.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/LayerFE.h
@@ -18,10 +18,19 @@
 
 #include <utils/RefBase.h>
 
-namespace android::compositionengine {
+namespace android {
+
+class Fence;
+
+namespace compositionengine {
 
 // Defines the interface used by the CompositionEngine to make requests
 // of the front-end layer
-class LayerFE : public virtual RefBase {};
+class LayerFE : public virtual RefBase {
+public:
+    // Called after the layer is displayed to update the presentation fence
+    virtual void onLayerDisplayed(const sp<Fence>&) = 0;
+};
 
-} // namespace android::compositionengine
+} // namespace compositionengine
+} // namespace android
diff --git a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h
index 92e0070..a0c2a63 100644
--- a/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h
+++ b/services/surfaceflinger/CompositionEngine/include/compositionengine/mock/LayerFE.h
@@ -18,6 +18,7 @@
 
 #include <compositionengine/LayerFE.h>
 #include <gmock/gmock.h>
+#include <ui/Fence.h>
 
 namespace android::compositionengine::mock {
 
@@ -27,6 +28,8 @@
 public:
     LayerFE();
     virtual ~LayerFE();
+
+    MOCK_METHOD1(onLayerDisplayed, void(const sp<Fence>&));
 };
 
 } // namespace android::compositionengine::mock
diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index b6eef0b..0ff7755 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -69,10 +69,7 @@
 std::atomic<int32_t> Layer::sSequence{1};
 
 Layer::Layer(const LayerCreationArgs& args)
-      : mFlinger(args.flinger),
-        mName(args.name),
-        mClientRef(args.client),
-        mBE{this, args.name.string()} {
+      : mFlinger(args.flinger), mName(args.name), mClientRef(args.client) {
     mCurrentCrop.makeInvalid();
 
     uint32_t layerFlags = 0;
diff --git a/services/surfaceflinger/Layer.h b/services/surfaceflinger/Layer.h
index fcec262..de73a4b 100644
--- a/services/surfaceflinger/Layer.h
+++ b/services/surfaceflinger/Layer.h
@@ -45,7 +45,6 @@
 
 #include "Client.h"
 #include "FrameTracker.h"
-#include "LayerBE.h"
 #include "LayerVector.h"
 #include "MonitoredProducer.h"
 #include "SurfaceFlinger.h"
@@ -67,7 +66,6 @@
 class GraphicBuffer;
 class SurfaceFlinger;
 class LayerDebugInfo;
-class LayerBE;
 
 namespace compositionengine {
 class Layer;
@@ -97,9 +95,6 @@
     static std::atomic<int32_t> sSequence;
 
 public:
-    friend class LayerBE;
-    LayerBE& getBE() { return mBE; }
-    LayerBE& getBE() const { return mBE; }
     mutable bool contentDirty{false};
     // regions below are in window-manager space
     Region visibleRegion;
@@ -440,6 +435,11 @@
                                     renderengine::LayerSettings& layer) = 0;
 
 public:
+    /*
+     * compositionengine::LayerFE overrides
+     */
+    void onLayerDisplayed(const sp<Fence>& releaseFence) override;
+
     virtual void setDefaultBufferSize(uint32_t /*w*/, uint32_t /*h*/) {}
 
     virtual bool isHdrY410() const { return false; }
@@ -460,11 +460,6 @@
     bool getClearClientTarget(const sp<const DisplayDevice>& display) const;
     void updateCursorPosition(const sp<const DisplayDevice>& display);
 
-    /*
-     * called after page-flip
-     */
-    virtual void onLayerDisplayed(const sp<Fence>& releaseFence);
-
     virtual bool shouldPresentNow(nsecs_t /*expectedPresentTime*/) const { return false; }
     virtual void setTransformHint(uint32_t /*orientation*/) const { }
 
@@ -860,8 +855,6 @@
     wp<Layer> mCurrentParent;
     wp<Layer> mDrawingParent;
 
-    mutable LayerBE mBE;
-
     // Can only be accessed with the SF state lock held.
     bool mLayerDetached{false};
     // Can only be accessed with the SF state lock held.
diff --git a/services/surfaceflinger/LayerBE.cpp b/services/surfaceflinger/LayerBE.cpp
deleted file mode 100644
index 9f63440..0000000
--- a/services/surfaceflinger/LayerBE.cpp
+++ /dev/null
@@ -1,40 +0,0 @@
-/*
- * Copyright (C) 2017 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#define LOG_NDEBUG 0
-#undef LOG_TAG
-#define LOG_TAG "LayerBE"
-#define ATRACE_TAG ATRACE_TAG_GRAPHICS
-
-#include "Layer.h"
-
-namespace android {
-
-LayerBE::LayerBE(Layer* layer, std::string layerName) : mLayer(layer) {
-    compositionInfo.layer = std::make_shared<LayerBE>(*this);
-    compositionInfo.layerName = layerName;
-}
-
-LayerBE::LayerBE(const LayerBE& layer) : mLayer(layer.mLayer) {
-    compositionInfo.layer = layer.compositionInfo.layer;
-    compositionInfo.layerName = layer.mLayer->getName().string();
-}
-
-void LayerBE::onLayerDisplayed(const sp<Fence>& releaseFence) {
-    mLayer->onLayerDisplayed(releaseFence);
-}
-
-}; // namespace android
diff --git a/services/surfaceflinger/LayerBE.h b/services/surfaceflinger/LayerBE.h
deleted file mode 100644
index 51f7857..0000000
--- a/services/surfaceflinger/LayerBE.h
+++ /dev/null
@@ -1,63 +0,0 @@
-/*
- * Copyright (C) 2018 The Android Open Source Project
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *      http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-#pragma once
-
-#include <stdint.h>
-#include <string.h>
-
-#include <ui/Fence.h>
-#include <utils/StrongPointer.h>
-
-#include "DisplayHardware/DisplayIdentification.h"
-
-namespace android {
-
-class LayerBE;
-
-struct CompositionInfo {
-    std::string layerName;
-    std::shared_ptr<LayerBE> layer;
-    struct {
-        DisplayId displayId;
-    } hwc;
-};
-
-class LayerBE {
-public:
-    friend class Layer;
-    friend class BufferLayer;
-    friend class BufferQueueLayer;
-    friend class BufferStateLayer;
-    friend class ColorLayer;
-    friend class SurfaceFlinger;
-
-    // For unit tests
-    friend class TestableSurfaceFlinger;
-
-    LayerBE(Layer* layer, std::string layerName);
-    explicit LayerBE(const LayerBE& layer);
-
-    void onLayerDisplayed(const sp<Fence>& releaseFence);
-
-    Layer*const mLayer;
-
-private:
-    CompositionInfo compositionInfo;
-};
-
-}; // namespace android
-
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index daa9ff9..75e84e6 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -1721,8 +1721,6 @@
 
     mVsyncModulator.onRefreshed(mHadClientComposition);
 
-    getBE().mEndOfFrameCompositionInfo = std::move(getBE().mCompositionInfo);
-
     mLayersWithQueuedFrames.clear();
 }
 
@@ -1835,12 +1833,9 @@
     for (const auto& [token, displayDevice] : mDisplays) {
         auto display = displayDevice->getCompositionDisplay();
         for (auto& layer : displayDevice->getVisibleLayersSortedByZ()) {
-            const auto displayId = display->getId();
             auto& layerState = layer->getCompositionLayer()->editState().frontEnd;
             layerState.compositionType = static_cast<Hwc2::IComposerClient::Composition>(
                     layer->getCompositionType(displayDevice));
-            layer->getBE().compositionInfo.hwc.displayId = *displayId;
-            getBE().mCompositionInfo[token].push_back(layer->getBE().compositionInfo);
         }
     }
 }
@@ -2215,17 +2210,6 @@
     ATRACE_CALL();
     ALOGV("rebuildLayerStacks");
 
-    // We need to clear these out now as these may be holding on to a
-    // HWC2::Layer reference at the same time as the LayerBE::HWCInfo structure
-    // also holds a reference. When the set of visible layers is recomputed,
-    // some layers may be destroyed if the only thing keeping them alive was
-    // that list of visible layers associated with each display. The layer
-    // destruction code asserts that the HWC2::Layer is properly destroyed, but
-    // that doesn't happen if SurfaceFlingerBE::mCompositionInfo keeps it alive.
-    for (const auto& [token, display] : mDisplays) {
-        getBE().mCompositionInfo[token].clear();
-    }
-
     // rebuild the visible layer list per screen
     if (CC_UNLIKELY(mVisibleRegionsDirty)) {
         ATRACE_NAME("rebuildLayerStacks VR Dirty");
@@ -2499,16 +2483,19 @@
             getHwComposer().presentAndGetReleaseFences(*displayId);
         }
         display->getRenderSurface()->onPresentDisplayCompleted();
-        for (auto& layer : displayDevice->getVisibleLayersSortedByZ()) {
+        for (auto& layer : display->getOutputLayersOrderedByZ()) {
             sp<Fence> releaseFence = Fence::NO_FENCE;
+            bool usedClientComposition = true;
 
             // The layer buffer from the previous frame (if any) is released
             // by HWC only when the release fence from this frame (if any) is
             // signaled.  Always get the release fence from HWC first.
-            if (displayId && layer->hasHwcLayer(displayDevice)) {
+            if (layer->getState().hwc) {
+                const auto& hwcState = *layer->getState().hwc;
                 releaseFence =
-                        getHwComposer().getLayerReleaseFence(*displayId,
-                                                             layer->getHwcLayer(displayDevice));
+                        getHwComposer().getLayerReleaseFence(*displayId, hwcState.hwcLayer.get());
+                usedClientComposition =
+                        hwcState.hwcCompositionType == Hwc2::IComposerClient::Composition::CLIENT;
             }
 
             // If the layer was client composited in the previous frame, we
@@ -2516,14 +2503,13 @@
             // Since we do not track that, always merge with the current
             // client target acquire fence when it is available, even though
             // this is suboptimal.
-            if (layer->getCompositionType(displayDevice) ==
-                Hwc2::IComposerClient::Composition::CLIENT) {
+            if (usedClientComposition) {
                 releaseFence =
                         Fence::merge("LayerRelease", releaseFence,
                                      display->getRenderSurface()->getClientTargetAcquireFence());
             }
 
-            layer->getBE().onLayerDisplayed(releaseFence);
+            layer->getLayerFE().onLayerDisplayed(releaseFence);
         }
 
         // We've got a list of layers needing fences, that are disjoint with
@@ -2533,7 +2519,7 @@
             sp<Fence> presentFence =
                     displayId ? getHwComposer().getPresentFence(*displayId) : Fence::NO_FENCE;
             for (auto& layer : displayDevice->getLayersNeedingFences()) {
-                layer->getBE().onLayerDisplayed(presentFence);
+                layer->getCompositionLayer()->getLayerFE()->onLayerDisplayed(presentFence);
             }
         }
 
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index 4fb1c0e..8206cf0 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -55,7 +55,6 @@
 #include "DisplayHardware/HWComposer.h"
 #include "Effects/Daltonizer.h"
 #include "FrameTracker.h"
-#include "LayerBE.h"
 #include "LayerStats.h"
 #include "LayerVector.h"
 #include "RegionSamplingThread.h"
@@ -106,7 +105,6 @@
 class SurfaceFlingerBE;
 class TimeStats;
 class VSyncSource;
-struct CompositionInfo;
 
 namespace compositionengine {
 class DisplaySurface;
@@ -199,9 +197,6 @@
     // use to differentiate callbacks from different hardware composer
     // instances. Each hardware composer instance gets a different sequence id.
     int32_t mComposerSequenceId;
-
-    std::map<wp<IBinder>, std::vector<CompositionInfo>> mCompositionInfo;
-    std::map<wp<IBinder>, std::vector<CompositionInfo>> mEndOfFrameCompositionInfo;
 };
 
 class SetInputWindowsListener : public BnSetInputWindowsListener {