Merge "Add a flag for refresh rate switching"
diff --git a/cmds/idlcli/Android.bp b/cmds/idlcli/Android.bp
new file mode 100644
index 0000000..40b8dc7
--- /dev/null
+++ b/cmds/idlcli/Android.bp
@@ -0,0 +1,53 @@
+// Copyright (C) 2019 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.
+
+cc_defaults {
+    name: "idlcli-defaults",
+    shared_libs: [
+        "android.hardware.vibrator@1.0",
+        "android.hardware.vibrator@1.1",
+        "android.hardware.vibrator@1.2",
+        "android.hardware.vibrator@1.3",
+        "libbase",
+        "libhidlbase",
+        "liblog",
+        "libutils",
+    ],
+    cflags: [
+        "-DLOG_TAG=\"idlcli\"",
+    ],
+}
+
+cc_library {
+    name: "libidlcli",
+    defaults: ["idlcli-defaults"],
+    srcs: [
+        "CommandVibrator.cpp",
+        "vibrator/CommandOff.cpp",
+        "vibrator/CommandOn.cpp",
+        "vibrator/CommandPerform.cpp",
+        "vibrator/CommandSetAmplitude.cpp",
+        "vibrator/CommandSetExternalControl.cpp",
+        "vibrator/CommandSupportsAmplitudeControl.cpp",
+        "vibrator/CommandSupportsExternalControl.cpp",
+    ],
+    visibility: [":__subpackages__"],
+}
+
+cc_binary {
+    name: "idlcli",
+    defaults: ["idlcli-defaults"],
+    srcs: ["main.cpp"],
+    whole_static_libs: ["libidlcli"],
+}
diff --git a/cmds/idlcli/CommandVibrator.cpp b/cmds/idlcli/CommandVibrator.cpp
new file mode 100644
index 0000000..a7a70c3
--- /dev/null
+++ b/cmds/idlcli/CommandVibrator.cpp
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+
+namespace android {
+namespace idlcli {
+
+class IdlCli;
+
+class CommandVibrator : public CommandWithSubcommands<CommandVibrator> {
+    std::string getDescription() const override { return "Invoke Vibrator HIDL APIs."; }
+
+    std::string getUsageSummary() const override { return "<api> [arguments]"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<api>", CommandRegistry<CommandVibrator>::List()},
+        };
+        return details;
+    }
+};
+
+static const auto Command = CommandRegistry<IdlCli>::Register<CommandVibrator>("vibrator");
+
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/IdlCli.h b/cmds/idlcli/IdlCli.h
new file mode 100644
index 0000000..dd84304
--- /dev/null
+++ b/cmds/idlcli/IdlCli.h
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#ifndef FRAMEWORK_NATIVE_CMDS_IDLCLI_IDLCLI_H_
+#define FRAMEWORK_NATIVE_CMDS_IDLCLI_IDLCLI_H_
+
+#include "utils.h"
+
+namespace android {
+namespace idlcli {
+
+class IdlCli : public CommandWithSubcommands<IdlCli> {
+    std::string getDescription() const override { return "Invoke IDL APIs."; }
+
+    std::string getUsageSummary() const override { return "<idl> [arguments]"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<idl>", CommandRegistry<IdlCli>::List()},
+        };
+        return details;
+    }
+};
+
+} // namespace idlcli
+} // namespace android
+
+#endif // FRAMEWORK_NATIVE_CMDS_IDLCLI_IDLCLI_H_
diff --git a/cmds/idlcli/main.cpp b/cmds/idlcli/main.cpp
new file mode 100644
index 0000000..9ed9d82
--- /dev/null
+++ b/cmds/idlcli/main.cpp
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "IdlCli.h"
+#include "utils.h"
+
+int main(const int argc, const char* const argv[]) {
+    using namespace ::android::idlcli;
+    return IdlCli{}.main(Args{argc, argv});
+}
diff --git a/cmds/idlcli/utils.h b/cmds/idlcli/utils.h
new file mode 100644
index 0000000..a8e5954
--- /dev/null
+++ b/cmds/idlcli/utils.h
@@ -0,0 +1,270 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#ifndef FRAMEWORK_NATIVE_CMDS_IDLCLI_UTILS_H_
+#define FRAMEWORK_NATIVE_CMDS_IDLCLI_UTILS_H_
+
+#include <hidl/HidlSupport.h>
+
+#include <iomanip>
+#include <iostream>
+#include <map>
+#include <sstream>
+#include <string>
+#include <vector>
+
+namespace android {
+namespace idlcli {
+
+namespace overrides {
+
+namespace details {
+
+template <typename T>
+inline std::istream &operator>>(std::istream &stream, T &out) {
+    auto pos = stream.tellg();
+    auto tmp = +out;
+    auto min = +std::numeric_limits<T>::min();
+    auto max = +std::numeric_limits<T>::max();
+    stream >> tmp;
+    if (!stream) {
+        return stream;
+    }
+    if (tmp < min || tmp > max) {
+        stream.seekg(pos);
+        stream.setstate(std::ios_base::failbit);
+        return stream;
+    }
+    out = tmp;
+    return stream;
+}
+
+} // namespace details
+
+// override for default behavior of treating as a character
+inline std::istream &operator>>(std::istream &stream, int8_t &out) {
+    return details::operator>>(stream, out);
+}
+
+// override for default behavior of treating as a character
+inline std::istream &operator>>(std::istream &stream, uint8_t &out) {
+    return details::operator>>(stream, out);
+}
+
+} // namespace overrides
+
+template <typename T, typename R = hardware::hidl_enum_range<T>>
+inline std::istream &operator>>(std::istream &stream, T &out) {
+    using overrides::operator>>;
+    auto validRange = R();
+    auto pos = stream.tellg();
+    std::underlying_type_t<T> in;
+    T tmp;
+    stream >> in;
+    if (!stream) {
+        return stream;
+    }
+    tmp = static_cast<T>(in);
+    if (tmp < *validRange.begin() || tmp > *std::prev(validRange.end())) {
+        stream.seekg(pos);
+        stream.setstate(std::ios_base::failbit);
+        return stream;
+    }
+    out = tmp;
+    return stream;
+}
+
+enum Status : unsigned int {
+    OK,
+    USAGE,
+    UNAVAILABLE,
+    ERROR,
+};
+
+class Args {
+public:
+    Args(const int argc, const char *const argv[]) {
+        for (int argi = 0; argi < argc; argi++) {
+            mArgs.emplace_back(std::string_view(argv[argi]));
+        }
+    }
+
+    template <typename T = std::string>
+    std::optional<T> get() {
+        return get<T>(false);
+    }
+
+    template <typename T = std::string>
+    std::optional<T> pop() {
+        return get<T>(true);
+    }
+
+    bool empty() { return mArgs.empty(); }
+
+private:
+    template <typename T>
+    std::optional<T> get(bool erase) {
+        using idlcli::operator>>;
+        using overrides::operator>>;
+        T retValue;
+
+        if (mArgs.empty()) {
+            return {};
+        }
+
+        std::stringstream stream{std::string{mArgs.front()}};
+        stream >> std::setbase(0) >> retValue;
+        if (!stream || !stream.eof()) {
+            return {};
+        }
+
+        if (erase) {
+            mArgs.erase(mArgs.begin());
+        }
+
+        return retValue;
+    }
+
+    std::vector<std::string_view> mArgs;
+};
+
+class Command {
+protected:
+    struct Usage {
+        std::string name;
+        std::vector<std::string> details;
+    };
+    using UsageDetails = std::vector<Usage>;
+
+public:
+    virtual ~Command() = default;
+
+    Status main(Args &&args) {
+        Status status = doArgsAndMain(std::move(args));
+        if (status == USAGE) {
+            printUsage();
+            return ERROR;
+        }
+        if (status == UNAVAILABLE) {
+            std::cerr << "The requested operation is unavailable." << std::endl;
+            return ERROR;
+        }
+        return status;
+    }
+
+private:
+    virtual std::string getDescription() const = 0;
+    virtual std::string getUsageSummary() const = 0;
+    virtual UsageDetails getUsageDetails() const = 0;
+    virtual Status doArgs(Args &args) = 0;
+    virtual Status doMain(Args &&args) = 0;
+
+    void printUsage() const {
+        std::cerr << "Description:\n  " << getDescription() << std::endl;
+        std::cerr << "Usage:\n  " << mName << " " << getUsageSummary() << std::endl;
+
+        std::cerr << "Details:" << std::endl;
+        size_t entryNameWidth = 0;
+        for (auto &entry : getUsageDetails()) {
+            entryNameWidth = std::max(entryNameWidth, entry.name.length());
+        }
+        for (auto &entry : getUsageDetails()) {
+            auto prefix = entry.name;
+            for (auto &line : entry.details) {
+                std::cerr << "  " << std::left << std::setw(entryNameWidth + 8) << prefix << line
+                          << std::endl;
+                prefix = "";
+            }
+        }
+    }
+
+    Status doArgsAndMain(Args &&args) {
+        Status status;
+        mName = *args.pop();
+        if ((status = doArgs(args)) != OK) {
+            return status;
+        }
+        if ((status = doMain(std::move(args))) != OK) {
+            return status;
+        }
+        return OK;
+    }
+
+protected:
+    std::string mName;
+};
+
+template <typename T>
+class CommandRegistry {
+private:
+    using CommandCreator = std::function<std::unique_ptr<Command>()>;
+
+public:
+    template <typename U>
+    static CommandCreator Register(const std::string name) {
+        Instance()->mCommands[name] = [] { return std::make_unique<U>(); };
+        return Instance()->mCommands[name];
+    }
+
+    static std::unique_ptr<Command> Create(const std::string name) {
+        auto it = Instance()->mCommands.find(name);
+        if (it == Instance()->mCommands.end()) {
+            return nullptr;
+        }
+        return it->second();
+    }
+
+    static auto List() {
+        std::vector<std::string> list;
+        for (auto &it : Instance()->mCommands) {
+            list.push_back(it.first);
+        }
+        std::sort(list.begin(), list.end());
+        return list;
+    }
+
+private:
+    static CommandRegistry *Instance() {
+        static CommandRegistry sRegistry;
+        return &sRegistry;
+    }
+
+private:
+    std::map<const std::string, CommandCreator> mCommands;
+};
+
+template <typename T>
+class CommandWithSubcommands : public Command {
+private:
+    Status doArgs(Args &args) override {
+        mCommand = CommandRegistry<T>::Create(*args.get());
+        if (!mCommand) {
+            std::cerr << "Invalid Command!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args &&args) override { return mCommand->main(std::move(args)); }
+
+protected:
+    std::unique_ptr<Command> mCommand;
+};
+
+} // namespace idlcli
+} // namespace android
+
+#endif // FRAMEWORK_NATIVE_CMDS_IDLCLI_UTILS_H_
diff --git a/cmds/idlcli/vibrator.h b/cmds/idlcli/vibrator.h
new file mode 100644
index 0000000..bcb207b
--- /dev/null
+++ b/cmds/idlcli/vibrator.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#ifndef FRAMEWORK_NATIVE_CMDS_IDLCLI_VIBRATOR_H_
+#define FRAMEWORK_NATIVE_CMDS_IDLCLI_VIBRATOR_H_
+
+#include <android/hardware/vibrator/1.3/IVibrator.h>
+
+#include "utils.h"
+
+#include "log/log.h"
+
+namespace android {
+
+using hardware::Return;
+
+static constexpr int NUM_TRIES = 2;
+
+// Creates a Return<R> with STATUS::EX_NULL_POINTER.
+template <class R>
+inline Return<R> NullptrStatus() {
+    using ::android::hardware::Status;
+    return Return<R>{Status::fromExceptionCode(Status::EX_NULL_POINTER)};
+}
+
+template <typename I>
+class HalWrapper {
+public:
+    static std::unique_ptr<HalWrapper> Create() {
+        // Assume that if getService returns a nullptr, HAL is not available on the
+        // device.
+        auto hal = I::getService();
+        return hal ? std::unique_ptr<HalWrapper>(new HalWrapper(std::move(hal))) : nullptr;
+    }
+
+    template <class R, class... Args0, class... Args1>
+    Return<R> call(Return<R> (I::*fn)(Args0...), Args1&&... args1) {
+        return (*mHal.*fn)(std::forward<Args1>(args1)...);
+    }
+
+private:
+    HalWrapper(sp<I>&& hal) : mHal(std::move(hal)) {}
+
+private:
+    sp<I> mHal;
+};
+
+template <typename I>
+static auto getHal() {
+    static auto sHalWrapper = HalWrapper<I>::Create();
+    return sHalWrapper.get();
+}
+
+template <class R, class I, class... Args0, class... Args1>
+Return<R> halCall(Return<R> (I::*fn)(Args0...), Args1&&... args1) {
+    auto hal = getHal<I>();
+    return hal ? hal->call(fn, std::forward<Args1>(args1)...) : NullptrStatus<R>();
+}
+
+namespace idlcli {
+namespace vibrator {
+
+namespace V1_0 = ::android::hardware::vibrator::V1_0;
+namespace V1_1 = ::android::hardware::vibrator::V1_1;
+namespace V1_2 = ::android::hardware::vibrator::V1_2;
+namespace V1_3 = ::android::hardware::vibrator::V1_3;
+
+} // namespace vibrator
+} // namespace idlcli
+
+} // namespace android
+
+#endif // FRAMEWORK_NATIVE_CMDS_IDLCLI_VIBRATOR_H_
diff --git a/cmds/idlcli/vibrator/CommandOff.cpp b/cmds/idlcli/vibrator/CommandOff.cpp
new file mode 100644
index 0000000..a674f01
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandOff.cpp
@@ -0,0 +1,61 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandOff : public Command {
+    std::string getDescription() const override { return "Turn off vibrator."; }
+
+    std::string getUsageSummary() const override { return ""; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{};
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_0::IVibrator::off);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << toString(ret) << std::endl;
+
+        return ret == V1_0::Status::OK ? OK : ERROR;
+    }
+};
+
+static const auto Command = CommandRegistry<CommandVibrator>::Register<CommandOff>("off");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandOn.cpp b/cmds/idlcli/vibrator/CommandOn.cpp
new file mode 100644
index 0000000..2164b7d
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandOn.cpp
@@ -0,0 +1,71 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandOn : public Command {
+    std::string getDescription() const override { return "Turn on vibrator."; }
+
+    std::string getUsageSummary() const override { return "<duration>"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<duration>", {"In milliseconds."}},
+        };
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (auto duration = args.pop<decltype(mDuration)>()) {
+            mDuration = *duration;
+        } else {
+            std::cerr << "Missing or Invalid Duration!" << std::endl;
+            return USAGE;
+        }
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_0::IVibrator::on, mDuration);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << toString(ret) << std::endl;
+
+        return ret == V1_0::Status::OK ? OK : ERROR;
+    }
+
+    uint32_t mDuration;
+};
+
+static const auto Command = CommandRegistry<CommandVibrator>::Register<CommandOn>("on");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandPerform.cpp b/cmds/idlcli/vibrator/CommandPerform.cpp
new file mode 100644
index 0000000..688cbd8
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandPerform.cpp
@@ -0,0 +1,107 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+using V1_0::EffectStrength;
+using V1_3::Effect;
+
+class CommandPerform : public Command {
+    std::string getDescription() const override { return "Perform vibration effect."; }
+
+    std::string getUsageSummary() const override { return "<effect> <strength>"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<effect>", {"Effect ID."}},
+                {"<strength>", {"0-2."}},
+        };
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (auto effect = args.pop<decltype(mEffect)>()) {
+            mEffect = *effect;
+            std::cout << "Effect: " << toString(mEffect) << std::endl;
+        } else {
+            std::cerr << "Missing or Invalid Effect!" << std::endl;
+            return USAGE;
+        }
+        if (auto strength = args.pop<decltype(mStrength)>()) {
+            mStrength = *strength;
+            std::cout << "Strength: " << toString(mStrength) << std::endl;
+        } else {
+            std::cerr << "Missing or Invalid Strength!" << std::endl;
+            return USAGE;
+        }
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        Return<void> ret;
+        V1_0::Status status;
+        uint32_t lengthMs;
+        auto callback = [&status, &lengthMs](V1_0::Status retStatus, uint32_t retLengthMs) {
+            status = retStatus;
+            lengthMs = retLengthMs;
+        };
+
+        if (auto hal = getHal<V1_3::IVibrator>()) {
+            ret = hal->call(&V1_3::IVibrator::perform_1_3, static_cast<V1_3::Effect>(mEffect),
+                            mStrength, callback);
+        } else if (auto hal = getHal<V1_2::IVibrator>()) {
+            ret = hal->call(&V1_2::IVibrator::perform_1_2, static_cast<V1_2::Effect>(mEffect),
+                            mStrength, callback);
+        } else if (auto hal = getHal<V1_1::IVibrator>()) {
+            ret = hal->call(&V1_1::IVibrator::perform_1_1, static_cast<V1_1::Effect_1_1>(mEffect),
+                            mStrength, callback);
+        } else if (auto hal = getHal<V1_0::IVibrator>()) {
+            ret = hal->call(&V1_0::IVibrator::perform, static_cast<V1_0::Effect>(mEffect),
+                            mStrength, callback);
+        } else {
+            ret = NullptrStatus<void>();
+        }
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << toString(status) << std::endl;
+        std::cout << "Length: " << lengthMs << std::endl;
+
+        return status == V1_0::Status::OK ? OK : ERROR;
+    }
+
+    Effect mEffect;
+    EffectStrength mStrength;
+};
+
+static const auto Command = CommandRegistry<CommandVibrator>::Register<CommandPerform>("perform");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandSetAmplitude.cpp b/cmds/idlcli/vibrator/CommandSetAmplitude.cpp
new file mode 100644
index 0000000..38a1dc2
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandSetAmplitude.cpp
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandSetAmplitude : public Command {
+    std::string getDescription() const override { return "Set vibration amplitude."; }
+
+    std::string getUsageSummary() const override { return "<amplitude>"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<amplitude>", {"1-255."}},
+        };
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (auto amplitude = args.pop<decltype(mAmplitude)>()) {
+            mAmplitude = *amplitude;
+        } else {
+            std::cerr << "Missing or Invalid Amplitude!" << std::endl;
+            return USAGE;
+        }
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_0::IVibrator::setAmplitude, mAmplitude);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << toString(ret) << std::endl;
+
+        return ret == V1_0::Status::OK ? OK : ERROR;
+    }
+
+    uint8_t mAmplitude;
+};
+
+static const auto Command =
+        CommandRegistry<CommandVibrator>::Register<CommandSetAmplitude>("setAmplitude");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandSetExternalControl.cpp b/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
new file mode 100644
index 0000000..5fb1fac
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandSetExternalControl.cpp
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandSetExternalControl : public Command {
+    std::string getDescription() const override {
+        return "Enable/disable vibration external control.";
+    }
+
+    std::string getUsageSummary() const override { return "<enable>"; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{
+                {"<enable>", {"0/1."}},
+        };
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (auto enable = args.pop<decltype(mEnable)>()) {
+            mEnable = *enable;
+        } else {
+            std::cerr << "Missing Enable!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_3::IVibrator::setExternalControl, mEnable);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Status: " << toString(ret) << std::endl;
+
+        return ret == V1_0::Status::OK ? OK : ERROR;
+    }
+
+    bool mEnable;
+};
+
+static const auto Command =
+        CommandRegistry<CommandVibrator>::Register<CommandSetExternalControl>("setExternalControl");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandSupportsAmplitudeControl.cpp b/cmds/idlcli/vibrator/CommandSupportsAmplitudeControl.cpp
new file mode 100644
index 0000000..cdc529a
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandSupportsAmplitudeControl.cpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandSupportsAmplitudeControl : public Command {
+    std::string getDescription() const override { return "Check support for amplitude control."; }
+
+    std::string getUsageSummary() const override { return ""; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{};
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_0::IVibrator::supportsAmplitudeControl);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Result: " << std::boolalpha << ret << std::endl;
+
+        return OK;
+    }
+};
+
+static const auto Command =
+        CommandRegistry<CommandVibrator>::Register<CommandSupportsAmplitudeControl>(
+                "supportsAmplitudeControl");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/cmds/idlcli/vibrator/CommandSupportsExternalControl.cpp b/cmds/idlcli/vibrator/CommandSupportsExternalControl.cpp
new file mode 100644
index 0000000..ed15d76
--- /dev/null
+++ b/cmds/idlcli/vibrator/CommandSupportsExternalControl.cpp
@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2019 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.
+ */
+
+#include "utils.h"
+#include "vibrator.h"
+
+namespace android {
+namespace idlcli {
+
+class CommandVibrator;
+
+namespace vibrator {
+
+class CommandSupportsExternalControl : public Command {
+    std::string getDescription() const override { return "Check support for external control."; }
+
+    std::string getUsageSummary() const override { return ""; }
+
+    UsageDetails getUsageDetails() const override {
+        UsageDetails details{};
+        return details;
+    }
+
+    Status doArgs(Args &args) override {
+        if (!args.empty()) {
+            std::cerr << "Unexpected Arguments!" << std::endl;
+            return USAGE;
+        }
+        return OK;
+    }
+
+    Status doMain(Args && /*args*/) override {
+        auto ret = halCall(&V1_3::IVibrator::supportsExternalControl);
+
+        if (!ret.isOk()) {
+            return UNAVAILABLE;
+        }
+
+        std::cout << "Result: " << std::boolalpha << ret << std::endl;
+
+        return OK;
+    }
+};
+
+static const auto Command =
+        CommandRegistry<CommandVibrator>::Register<CommandSupportsExternalControl>(
+                "supportsExternalControl");
+
+} // namespace vibrator
+} // namespace idlcli
+} // namespace android
diff --git a/libs/gui/Surface.cpp b/libs/gui/Surface.cpp
index 7e356e4..aad1849 100644
--- a/libs/gui/Surface.cpp
+++ b/libs/gui/Surface.cpp
@@ -1081,6 +1081,9 @@
     case NATIVE_WINDOW_SET_AUTO_PREROTATION:
         res = dispatchSetAutoPrerotation(args);
         break;
+    case NATIVE_WINDOW_GET_LAST_DEQUEUE_START:
+        res = dispatchGetLastDequeueStartTime(args);
+        break;
     default:
         res = NAME_NOT_FOUND;
         break;
@@ -1286,6 +1289,12 @@
     return setAutoPrerotation(autoPrerotation);
 }
 
+int Surface::dispatchGetLastDequeueStartTime(va_list args) {
+    int64_t* lastDequeueStartTime = va_arg(args, int64_t*);
+    *lastDequeueStartTime = mLastDequeueStartTime;
+    return NO_ERROR;
+}
+
 bool Surface::transformToDisplayInverse() {
     return (mTransform & NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY) ==
             NATIVE_WINDOW_TRANSFORM_INVERSE_DISPLAY;
@@ -1950,11 +1959,6 @@
     return mGraphicBufferProducer->getConsumerUsage(outUsage);
 }
 
-nsecs_t Surface::getLastDequeueStartTime() const {
-    Mutex::Autolock lock(mMutex);
-    return mLastDequeueStartTime;
-}
-
 status_t Surface::getAndFlushRemovedBuffers(std::vector<sp<GraphicBuffer>>* out) {
     if (out == nullptr) {
         ALOGE("%s: out must not be null!", __FUNCTION__);
diff --git a/libs/gui/include/gui/Surface.h b/libs/gui/include/gui/Surface.h
index 28f5a26..5bcfcda 100644
--- a/libs/gui/include/gui/Surface.h
+++ b/libs/gui/include/gui/Surface.h
@@ -179,9 +179,6 @@
     status_t getUniqueId(uint64_t* outId) const;
     status_t getConsumerUsage(uint64_t* outUsage) const;
 
-    // Returns the CLOCK_MONOTONIC start time of the last dequeueBuffer call
-    nsecs_t getLastDequeueStartTime() const;
-
 protected:
     virtual ~Surface();
 
@@ -247,6 +244,7 @@
     int dispatchGetHdrSupport(va_list args);
     int dispatchGetConsumerUsage64(va_list args);
     int dispatchSetAutoPrerotation(va_list args);
+    int dispatchGetLastDequeueStartTime(va_list args);
     bool transformToDisplayInverse();
 
 protected:
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index 5a121d7..0b61d92 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -617,7 +617,7 @@
     anw->dequeueBuffer(anw.get(), &buffer, &fenceFd);
     nsecs_t after = systemTime(CLOCK_MONOTONIC);
 
-    nsecs_t lastDequeueTime = mSurface->getLastDequeueStartTime();
+    nsecs_t lastDequeueTime = ANativeWindow_getLastDequeueStartTime(anw.get());
     ASSERT_LE(before, lastDequeueTime);
     ASSERT_GE(after, lastDequeueTime);
 }
diff --git a/libs/nativewindow/ANativeWindow.cpp b/libs/nativewindow/ANativeWindow.cpp
index 4c59e6c..3b195f7 100644
--- a/libs/nativewindow/ANativeWindow.cpp
+++ b/libs/nativewindow/ANativeWindow.cpp
@@ -274,3 +274,13 @@
 int ANativeWindow_getLastDequeueDuration(ANativeWindow* window) {
     return query(window, NATIVE_WINDOW_LAST_DEQUEUE_DURATION);
 }
+
+int ANativeWindow_getLastQueueDuration(ANativeWindow* window) {
+    return query(window, NATIVE_WINDOW_LAST_QUEUE_DURATION);
+}
+
+int64_t ANativeWindow_getLastDequeueStartTime(ANativeWindow* window) {
+    int64_t time;
+    int success = window->perform(window, NATIVE_WINDOW_GET_LAST_DEQUEUE_START, &time);
+    return success < 0 ? success : time;
+}
diff --git a/libs/nativewindow/include/apex/window.h b/libs/nativewindow/include/apex/window.h
index 0260cbc..3ddd549 100644
--- a/libs/nativewindow/include/apex/window.h
+++ b/libs/nativewindow/include/apex/window.h
@@ -31,4 +31,21 @@
  */
 int ANativeWindow_getLastDequeueDuration(ANativeWindow* window);
 
+/**
+ * Retrieves how long it took for the last time a buffer was queued.
+ *
+ * \return a negative value on error, otherwise returns the duration in
+ * microseconds
+ */
+int ANativeWindow_getLastQueueDuration(ANativeWindow* window);
+
+/**
+ * Retrieves the system time in nanoseconds when the last time a buffer
+ * was dequeued.
+ *
+ * \return a negative value on error, otherwise returns the duration in
+ * nanoseconds.
+ */
+int64_t ANativeWindow_getLastDequeueStartTime(ANativeWindow* window);
+
 __END_DECLS
diff --git a/libs/nativewindow/include/system/window.h b/libs/nativewindow/include/system/window.h
index 78354bb..b7ae28a 100644
--- a/libs/nativewindow/include/system/window.h
+++ b/libs/nativewindow/include/system/window.h
@@ -93,7 +93,6 @@
      */
     NATIVE_WINDOW_CONCRETE_TYPE = 5,
 
-
     /*
      * Default width and height of ANativeWindow buffers, these are the
      * dimensions of the window buffers irrespective of the
@@ -240,6 +239,7 @@
     NATIVE_WINDOW_SET_BUFFERS_CTA861_3_METADATA   = 33,
     NATIVE_WINDOW_SET_BUFFERS_HDR10_PLUS_METADATA = 34,
     NATIVE_WINDOW_SET_AUTO_PREROTATION            = 35,
+    NATIVE_WINDOW_GET_LAST_DEQUEUE_START          = 36,    /* private */
     // clang-format on
 };
 
diff --git a/libs/nativewindow/libnativewindow.map.txt b/libs/nativewindow/libnativewindow.map.txt
index 7fe4df0..33c6400 100644
--- a/libs/nativewindow/libnativewindow.map.txt
+++ b/libs/nativewindow/libnativewindow.map.txt
@@ -23,6 +23,8 @@
     ANativeWindow_getFormat;
     ANativeWindow_getHeight;
     ANativeWindow_getLastDequeueDuration; # apex # introduced=30
+    ANativeWindow_getLastDequeueStartTime; # apex # introduced=30
+    ANativeWindow_getLastQueueDuration; # apex # introduced=30
     ANativeWindow_getWidth;
     ANativeWindow_lock;
     ANativeWindow_query; # vndk
diff --git a/libs/nativewindow/tests/ANativeWindowTest.cpp b/libs/nativewindow/tests/ANativeWindowTest.cpp
index 5247e04..947217d 100644
--- a/libs/nativewindow/tests/ANativeWindowTest.cpp
+++ b/libs/nativewindow/tests/ANativeWindowTest.cpp
@@ -36,6 +36,12 @@
 
     // Exposes the internal last dequeue duration that's stored on the Surface.
     nsecs_t getLastDequeueDuration() const { return mLastDequeueDuration; }
+
+    // Exposes the internal last queue duration that's stored on the Surface.
+    nsecs_t getLastQueueDuration() const { return mLastQueueDuration; }
+
+    // Exposes the internal last dequeue start time that's stored on the Surface.
+    nsecs_t getLastDequeueStartTime() const { return mLastDequeueStartTime; }
 };
 
 class ANativeWindowTest : public ::testing::Test {
@@ -82,3 +88,53 @@
     EXPECT_GT(result, 0);
     EXPECT_EQ(result, mWindow->getLastDequeueDuration() / 1000);
 }
+
+TEST_F(ANativeWindowTest, getLastQueueDuration_noDequeue_returnsZero) {
+    int result = ANativeWindow_getLastQueueDuration(mWindow.get());
+    EXPECT_EQ(0, result);
+    EXPECT_EQ(0, mWindow->getLastQueueDuration());
+}
+
+TEST_F(ANativeWindowTest, getLastQueueDuration_noQueue_returnsZero) {
+    ANativeWindowBuffer* buffer;
+    int fd;
+    int result = ANativeWindow_dequeueBuffer(mWindow.get(), &buffer, &fd);
+    close(fd);
+    EXPECT_EQ(0, result);
+
+    result = ANativeWindow_getLastQueueDuration(mWindow.get());
+    EXPECT_EQ(result, 0);
+    EXPECT_EQ(result, mWindow->getLastQueueDuration());
+}
+
+TEST_F(ANativeWindowTest, getLastQueueDuration_withQueue_returnsTime) {
+    ANativeWindowBuffer* buffer;
+    int fd;
+    int result = ANativeWindow_dequeueBuffer(mWindow.get(), &buffer, &fd);
+    close(fd);
+    EXPECT_EQ(0, result);
+
+    result = ANativeWindow_queueBuffer(mWindow.get(), buffer, 0);
+
+    result = ANativeWindow_getLastQueueDuration(mWindow.get());
+    EXPECT_GT(result, 0);
+    EXPECT_EQ(result, mWindow->getLastQueueDuration() / 1000);
+}
+
+TEST_F(ANativeWindowTest, getLastDequeueStartTime_noDequeue_returnsZero) {
+    int64_t result = ANativeWindow_getLastDequeueStartTime(mWindow.get());
+    EXPECT_EQ(0, result);
+    EXPECT_EQ(0, mWindow->getLastQueueDuration());
+}
+
+TEST_F(ANativeWindowTest, getLastDequeueStartTime_withDequeue_returnsTime) {
+    ANativeWindowBuffer* buffer;
+    int fd;
+    int dequeueResult = ANativeWindow_dequeueBuffer(mWindow.get(), &buffer, &fd);
+    close(fd);
+    EXPECT_EQ(0, dequeueResult);
+
+    int64_t result = ANativeWindow_getLastDequeueStartTime(mWindow.get());
+    EXPECT_GT(result, 0);
+    EXPECT_EQ(result, mWindow->getLastDequeueStartTime());
+}
diff --git a/services/inputflinger/InputReader.cpp b/services/inputflinger/InputReader.cpp
index 1cbf78e..d59f274 100644
--- a/services/inputflinger/InputReader.cpp
+++ b/services/inputflinger/InputReader.cpp
@@ -1141,13 +1141,24 @@
                 }
             }
 
-            setEnabled(enabled, when);
+            if (changes) {
+                // For first-time configuration, only allow device to be disabled after mappers have
+                // finished configuring. This is because we need to read some of the properties from
+                // the device's open fd.
+                setEnabled(enabled, when);
+            }
         }
 
         for (InputMapper* mapper : mMappers) {
             mapper->configure(when, config, changes);
             mSources |= mapper->getSources();
         }
+
+        // If a device is just plugged but it might be disabled, we need to update some info like
+        // axis range of touch from each InputMapper first, then disable it.
+        if (!changes) {
+            setEnabled(config->disabledDevices.find(mId) == config->disabledDevices.end(), when);
+        }
     }
 }
 
diff --git a/services/inputflinger/tests/InputReader_test.cpp b/services/inputflinger/tests/InputReader_test.cpp
index 348a12b..09df2a7 100644
--- a/services/inputflinger/tests/InputReader_test.cpp
+++ b/services/inputflinger/tests/InputReader_test.cpp
@@ -527,7 +527,7 @@
     virtual status_t getAbsoluteAxisInfo(int32_t deviceId, int axis,
             RawAbsoluteAxisInfo* outAxisInfo) const {
         Device* device = getDevice(deviceId);
-        if (device) {
+        if (device && device->enabled) {
             ssize_t index = device->absoluteAxes.indexOfKey(axis);
             if (index >= 0) {
                 *outAxisInfo = device->absoluteAxes.valueAt(index);
@@ -6554,4 +6554,35 @@
     ASSERT_EQ(frames, motionArgs.videoFrames);
 }
 
+/**
+ * If we had defined port associations, but the viewport is not ready, the touch device would be
+ * expected to be disabled, and it should be enabled after the viewport has found.
+ */
+TEST_F(MultiTouchInputMapperTest, Configure_EnabledForAssociatedDisplay) {
+    MultiTouchInputMapper* mapper = new MultiTouchInputMapper(mDevice);
+    constexpr uint8_t hdmi2 = 1;
+    const std::string secondaryUniqueId = "uniqueId2";
+    constexpr ViewportType type = ViewportType::VIEWPORT_EXTERNAL;
+
+    mFakePolicy->addInputPortAssociation(DEVICE_LOCATION, hdmi2);
+
+    addConfigurationProperty("touch.deviceType", "touchScreen");
+    prepareAxes(POSITION);
+    addMapperAndConfigure(mapper);
+
+    ASSERT_EQ(mDevice->isEnabled(), false);
+
+    // Add display on hdmi2, the device should be enabled and can receive touch event.
+    prepareSecondaryDisplay(type, hdmi2);
+    ASSERT_EQ(mDevice->isEnabled(), true);
+
+    // Send a touch event.
+    processPosition(mapper, 100, 100);
+    processSync(mapper);
+
+    NotifyMotionArgs args;
+    ASSERT_NO_FATAL_FAILURE(mFakeListener->assertNotifyMotionWasCalled(&args));
+    ASSERT_EQ(SECONDARY_DISPLAY_ID, args.displayId);
+}
+
 } // namespace android
diff --git a/services/surfaceflinger/SurfaceFlinger.cpp b/services/surfaceflinger/SurfaceFlinger.cpp
index 2899034..c01d3aa 100644
--- a/services/surfaceflinger/SurfaceFlinger.cpp
+++ b/services/surfaceflinger/SurfaceFlinger.cpp
@@ -340,11 +340,6 @@
     mPropagateBackpressure = !atoi(value);
     ALOGI_IF(!mPropagateBackpressure, "Disabling backpressure propagation");
 
-    property_get("debug.sf.enable_gl_backpressure", value, "0");
-    mPropagateBackpressureClientComposition = atoi(value);
-    ALOGI_IF(mPropagateBackpressureClientComposition,
-             "Enabling backpressure propagation for Client Composition");
-
     property_get("debug.sf.enable_hwc_vds", value, "0");
     mUseHwcVirtualDisplays = atoi(value);
     ALOGI_IF(mUseHwcVirtualDisplays, "Enabling HWC virtual displays");
@@ -1652,9 +1647,9 @@
                 break;
             }
 
-            if (frameMissed && mPropagateBackpressure) {
-                if ((hwcFrameMissed && !gpuFrameMissed) ||
-                    mPropagateBackpressureClientComposition) {
+            // For now, only propagate backpressure when missing a hwc frame.
+            if (hwcFrameMissed && !gpuFrameMissed) {
+                if (mPropagateBackpressure) {
                     signalLayerUpdate();
                     break;
                 }
diff --git a/services/surfaceflinger/SurfaceFlinger.h b/services/surfaceflinger/SurfaceFlinger.h
index d357c3d..aaa50f6 100644
--- a/services/surfaceflinger/SurfaceFlinger.h
+++ b/services/surfaceflinger/SurfaceFlinger.h
@@ -983,7 +983,6 @@
     volatile nsecs_t mDebugInTransaction = 0;
     bool mForceFullDamage = false;
     bool mPropagateBackpressure = true;
-    bool mPropagateBackpressureClientComposition = false;
     std::unique_ptr<SurfaceInterceptor> mInterceptor;
     SurfaceTracing mTracing{*this};
     bool mTracingEnabled = false;
diff --git a/services/surfaceflinger/TimeStats/TimeStats.cpp b/services/surfaceflinger/TimeStats/TimeStats.cpp
index b01fa81..3df8360 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.cpp
+++ b/services/surfaceflinger/TimeStats/TimeStats.cpp
@@ -34,6 +34,14 @@
 
 namespace impl {
 
+TimeStats::TimeStats() {
+    // Temporarily enable TimeStats by default. Telemetry is disabled while
+    // we move onto statsd, so TimeStats is currently not exercised at all
+    // during testing.
+    // TODO: remove this.
+    enable();
+}
+
 void TimeStats::parseArgs(bool asProto, const Vector<String16>& args, std::string& result) {
     ATRACE_CALL();
 
diff --git a/services/surfaceflinger/TimeStats/TimeStats.h b/services/surfaceflinger/TimeStats/TimeStats.h
index 9ebc1ad..1313132 100644
--- a/services/surfaceflinger/TimeStats/TimeStats.h
+++ b/services/surfaceflinger/TimeStats/TimeStats.h
@@ -106,7 +106,7 @@
     };
 
 public:
-    TimeStats() = default;
+    TimeStats();
 
     void parseArgs(bool asProto, const Vector<String16>& args, std::string& result) override;
     bool isEnabled() override;
diff --git a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
index ffacbfe..dee2cae 100644
--- a/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
+++ b/services/surfaceflinger/tests/unittests/TimeStatsTest.cpp
@@ -209,6 +209,10 @@
     return distr(mRandomEngine);
 }
 
+TEST_F(TimeStatsTest, enabledByDefault) {
+    ASSERT_TRUE(mTimeStats->isEnabled());
+}
+
 TEST_F(TimeStatsTest, canEnableAndDisableTimeStats) {
     EXPECT_TRUE(inputCommand(InputCommand::ENABLE, FMT_STRING).empty());
     ASSERT_TRUE(mTimeStats->isEnabled());