diff --git a/cmds/dumpstate/dumpstate.cpp b/cmds/dumpstate/dumpstate.cpp
index 2b62415..7dbc9a4 100644
--- a/cmds/dumpstate/dumpstate.cpp
+++ b/cmds/dumpstate/dumpstate.cpp
@@ -589,7 +589,7 @@
     bool z;
     char *cp, *buffer = NULL;
     size_t i = 0;
-    FILE *fp = fdopen(fd, "rb");
+    FILE *fp = fdopen(dup(fd), "rb");
     getline(&buffer, &i, fp);
     fclose(fp);
     if (!buffer) {
diff --git a/services/surfaceflinger/Android.bp b/services/surfaceflinger/Android.bp
index 6943638..b919710 100644
--- a/services/surfaceflinger/Android.bp
+++ b/services/surfaceflinger/Android.bp
@@ -28,6 +28,7 @@
         "android.hardware.graphics.composer@2.2",
         "android.hardware.graphics.composer@2.3",
         "android.hardware.power@1.0",
+        "android.hardware.power@1.3",
         "libbase",
         "libbinder",
         "libbufferhubqueue",
@@ -71,6 +72,7 @@
         "android.hardware.graphics.composer@2.1",
         "android.hardware.graphics.composer@2.2",
         "android.hardware.graphics.composer@2.3",
+        "android.hardware.power@1.3",
         "libhidlbase",
         "libhidltransport",
         "libhwbinder",
@@ -99,6 +101,7 @@
         "DisplayHardware/HWC2.cpp",
         "DisplayHardware/HWComposer.cpp",
         "DisplayHardware/HWComposerBufferCache.cpp",
+        "DisplayHardware/PowerAdvisor.cpp",
         "DisplayHardware/VirtualDisplaySurface.cpp",
         "DispSync.cpp",
         "Effects/Daltonizer.cpp",
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.cpp b/services/surfaceflinger/DisplayHardware/HWC2.cpp
index 9546c86..add93fd 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.cpp
+++ b/services/surfaceflinger/DisplayHardware/HWC2.cpp
@@ -144,7 +144,7 @@
     }
 
     auto display = std::make_unique<Display>(
-            *mComposer.get(), mCapabilities, displayId, DisplayType::Virtual);
+            *mComposer.get(), mPowerAdvisor, mCapabilities, displayId, DisplayType::Virtual);
     display->setConnected(true);
     *outDisplay = display.get();
     mDisplays.emplace(displayId, std::move(display));
@@ -183,7 +183,7 @@
         }
 
         auto newDisplay = std::make_unique<Display>(
-                *mComposer.get(), mCapabilities, displayId, displayType);
+                *mComposer.get(), mPowerAdvisor, mCapabilities, displayId, displayType);
         newDisplay->setConnected(true);
         mDisplays.emplace(displayId, std::move(newDisplay));
     } else if (connection == Connection::Disconnected) {
@@ -225,10 +225,11 @@
 
 // Display methods
 
-Display::Display(android::Hwc2::Composer& composer,
+Display::Display(android::Hwc2::Composer& composer, android::Hwc2::PowerAdvisor& advisor,
                  const std::unordered_set<Capability>& capabilities, hwc2_display_t id,
                  DisplayType type)
       : mComposer(composer),
+        mPowerAdvisor(advisor),
         mCapabilities(capabilities),
         mId(id),
         mIsConnected(false),
@@ -611,6 +612,12 @@
 
 Error Display::setColorMode(ColorMode mode, RenderIntent renderIntent)
 {
+    // When the color mode is switched to DISPLAY_P3, we want to boost the GPU frequency
+    // so that GPU composition can finish in time. When color mode is switched from
+    // DISPLAY_P3, we want to reset GPU frequency.
+    const bool expensiveRenderingExpected = (mode == ColorMode::DISPLAY_P3);
+    mPowerAdvisor.setExpensiveRenderingExpected(mId, expensiveRenderingExpected);
+
     auto intError = mComposer.setColorMode(mId, mode, renderIntent);
     return static_cast<Error>(intError);
 }
diff --git a/services/surfaceflinger/DisplayHardware/HWC2.h b/services/surfaceflinger/DisplayHardware/HWC2.h
index eefab98..532685c 100644
--- a/services/surfaceflinger/DisplayHardware/HWC2.h
+++ b/services/surfaceflinger/DisplayHardware/HWC2.h
@@ -37,6 +37,8 @@
 #include <unordered_set>
 #include <vector>
 
+#include "PowerAdvisor.h"
+
 namespace android {
     class Fence;
     class FloatRect;
@@ -122,6 +124,7 @@
     std::unique_ptr<android::Hwc2::Composer> mComposer;
     std::unordered_set<Capability> mCapabilities;
     std::unordered_map<hwc2_display_t, std::unique_ptr<Display>> mDisplays;
+    android::Hwc2::impl::PowerAdvisor mPowerAdvisor;
     bool mRegisteredCallback = false;
 };
 
@@ -129,7 +132,8 @@
 class Display
 {
 public:
-    Display(android::Hwc2::Composer& composer, const std::unordered_set<Capability>& capabilities,
+    Display(android::Hwc2::Composer& composer, android::Hwc2::PowerAdvisor& advisor,
+            const std::unordered_set<Capability>& capabilities,
             hwc2_display_t id, DisplayType type);
     ~Display();
 
@@ -285,6 +289,7 @@
     // this HWC2::Display, so these references are guaranteed to be valid for
     // the lifetime of this object.
     android::Hwc2::Composer& mComposer;
+    android::Hwc2::PowerAdvisor& mPowerAdvisor;
     const std::unordered_set<Capability>& mCapabilities;
 
     hwc2_display_t mId;
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp b/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
new file mode 100644
index 0000000..0e4ad91
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.cpp
@@ -0,0 +1,100 @@
+/*
+ * Copyright 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.
+ */
+
+#undef LOG_TAG
+#define LOG_TAG "PowerAdvisor"
+
+#include <cinttypes>
+
+#include <utils/Log.h>
+#include <utils/Mutex.h>
+
+#include "PowerAdvisor.h"
+
+namespace android {
+namespace Hwc2 {
+
+PowerAdvisor::~PowerAdvisor() = default;
+
+namespace impl {
+
+namespace V1_0 = android::hardware::power::V1_0;
+using V1_3::PowerHint;
+
+PowerAdvisor::~PowerAdvisor() = default;
+
+PowerAdvisor::PowerAdvisor() = default;
+
+void PowerAdvisor::setExpensiveRenderingExpected(hwc2_display_t displayId, bool expected) {
+    if (expected) {
+        mExpensiveDisplays.insert(displayId);
+    } else {
+        mExpensiveDisplays.erase(displayId);
+    }
+
+    const sp<V1_3::IPower> powerHal = getPowerHal();
+    if (powerHal == nullptr) {
+        return;
+    }
+
+    const bool expectsExpensiveRendering = !mExpensiveDisplays.empty();
+    if (mNotifiedExpensiveRendering != expectsExpensiveRendering) {
+        auto ret = powerHal->powerHintAsync_1_3(PowerHint::EXPENSIVE_RENDERING,
+                                                expectsExpensiveRendering);
+        // If Power HAL 1.3 was available previously but now fails,
+        // it may restart, so attempt to reconnect next time
+        if (!ret.isOk()) {
+            mReconnectPowerHal = true;
+            return;
+        }
+        mNotifiedExpensiveRendering = expectsExpensiveRendering;
+    }
+}
+
+sp<V1_3::IPower> PowerAdvisor::getPowerHal() {
+    static sp<V1_3::IPower> sPowerHal_1_3 = nullptr;
+    static bool sHasPowerHal_1_3 = true;
+
+    if (mReconnectPowerHal) {
+        sPowerHal_1_3 = nullptr;
+        mReconnectPowerHal = false;
+    }
+
+    // Power HAL 1.3 is not guaranteed to be available, thus we need to query
+    // Power HAL 1.0 first and try to cast it to Power HAL 1.3.
+    // Power HAL 1.0 is always available, thus if we fail to query it, it means
+    // Power HAL is not available temporarily and we should retry later. However,
+    // if Power HAL 1.0 is available and we can't cast it to Power HAL 1.3,
+    // it means Power HAL 1.3 is not available at all, so we should stop trying.
+    if (sHasPowerHal_1_3 && sPowerHal_1_3 == nullptr) {
+        sp<V1_0::IPower> powerHal_1_0 = V1_0::IPower::getService();
+        if (powerHal_1_0 != nullptr) {
+            // Try to cast to Power HAL 1.3
+            sPowerHal_1_3 =  V1_3::IPower::castFrom(powerHal_1_0);
+            if (sPowerHal_1_3 == nullptr) {
+                ALOGW("No Power HAL 1.3 service in system");
+                sHasPowerHal_1_3 = false;
+            } else {
+                ALOGI("Loaded Power HAL 1.3 service");
+            }
+        }
+    }
+    return sPowerHal_1_3;
+}
+
+} // namespace impl
+} // namespace Hwc2
+} // namespace android
diff --git a/services/surfaceflinger/DisplayHardware/PowerAdvisor.h b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
new file mode 100644
index 0000000..573a1a9
--- /dev/null
+++ b/services/surfaceflinger/DisplayHardware/PowerAdvisor.h
@@ -0,0 +1,63 @@
+/*
+ * Copyright 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
+
+#define HWC2_INCLUDE_STRINGIFICATION
+#define HWC2_USE_CPP11
+#include <hardware/hwcomposer2.h>
+#undef HWC2_INCLUDE_STRINGIFICATION
+#undef HWC2_USE_CPP11
+
+#include <android/hardware/power/1.3/IPower.h>
+#include <utils/StrongPointer.h>
+
+#include <unordered_set>
+
+namespace android {
+namespace Hwc2 {
+
+class PowerAdvisor {
+public:
+    virtual ~PowerAdvisor();
+
+    virtual void setExpensiveRenderingExpected(hwc2_display_t displayId, bool expected) = 0;
+};
+
+namespace impl {
+
+namespace V1_3 = android::hardware::power::V1_3;
+
+// PowerAdvisor is a wrapper around IPower HAL which takes into account the
+// full state of the system when sending out power hints to things like the GPU.
+class PowerAdvisor final : public Hwc2::PowerAdvisor {
+public:
+    PowerAdvisor();
+    ~PowerAdvisor() override;
+
+    void setExpensiveRenderingExpected(hwc2_display_t displayId, bool expected) override;
+
+private:
+    sp<V1_3::IPower> getPowerHal();
+
+    std::unordered_set<hwc2_display_t> mExpensiveDisplays;
+    bool mNotifiedExpensiveRendering = false;
+    bool mReconnectPowerHal = false;
+};
+
+} // namespace impl
+} // namespace Hwc2
+} // namespace android
diff --git a/services/surfaceflinger/tests/fakehwc/Android.bp b/services/surfaceflinger/tests/fakehwc/Android.bp
index 19af82c..6ad1b87 100644
--- a/services/surfaceflinger/tests/fakehwc/Android.bp
+++ b/services/surfaceflinger/tests/fakehwc/Android.bp
@@ -11,6 +11,7 @@
     shared_libs: [
         "android.hardware.graphics.composer@2.1",
         "android.hardware.graphics.mapper@2.0",
+        "android.hardware.power@1.3",
         "libbase",
         "libbinder",
         "libcutils",
diff --git a/services/surfaceflinger/tests/unittests/Android.bp b/services/surfaceflinger/tests/unittests/Android.bp
index 508c561..95c54b8 100644
--- a/services/surfaceflinger/tests/unittests/Android.bp
+++ b/services/surfaceflinger/tests/unittests/Android.bp
@@ -24,6 +24,7 @@
         "EventThreadTest.cpp",
         "mock/DisplayHardware/MockComposer.cpp",
         "mock/DisplayHardware/MockDisplaySurface.cpp",
+        "mock/DisplayHardware/MockPowerAdvisor.cpp",
         "mock/gui/MockGraphicBufferConsumer.cpp",
         "mock/gui/MockGraphicBufferProducer.cpp",
         "mock/MockEventControlThread.cpp",
diff --git a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
index ae5a100..dd0702d 100644
--- a/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
+++ b/services/surfaceflinger/tests/unittests/TestableSurfaceFlinger.h
@@ -152,12 +152,18 @@
      * Wrapper classes for Read-write access to private data to set up
      * preconditions and assert post-conditions.
      */
+    class FakePowerAdvisor : public Hwc2::PowerAdvisor {
+    public:
+        FakePowerAdvisor() = default;
+        ~FakePowerAdvisor() override = default;
+        void setExpensiveRenderingExpected(hwc2_display_t, bool) override { }
+    };
 
     struct HWC2Display : public HWC2::Display {
-        HWC2Display(Hwc2::Composer& composer,
+        HWC2Display(Hwc2::Composer& composer, Hwc2::PowerAdvisor& advisor,
                     const std::unordered_set<HWC2::Capability>& capabilities, hwc2_display_t id,
                     HWC2::DisplayType type)
-              : HWC2::Display(composer, capabilities, id, type) {}
+              : HWC2::Display(composer, advisor, capabilities, id, type) {}
         ~HWC2Display() {
             // Prevents a call to disable vsyncs.
             mType = HWC2::DisplayType::Invalid;
@@ -220,8 +226,8 @@
         }
 
         void inject(TestableSurfaceFlinger* flinger, Hwc2::Composer* composer) {
-            auto display = std::make_unique<HWC2Display>(*composer, mCapabilities, mHwcDisplayId,
-                                                         mHwcDisplayType);
+            auto display = std::make_unique<HWC2Display>(*composer, mPowerAdvisor, mCapabilities,
+                                                         mHwcDisplayId, mHwcDisplayType);
 
             auto config = HWC2::Display::Config::Builder(*display, mActiveConfig);
             config.setWidth(mWidth);
@@ -251,6 +257,7 @@
         int32_t mDpiY = DEFAULT_DPI;
         int32_t mActiveConfig = DEFAULT_ACTIVE_CONFIG;
         std::unordered_set<HWC2::Capability> mCapabilities;
+        FakePowerAdvisor mPowerAdvisor;
     };
 
     class FakeDisplayDeviceInjector {
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.cpp b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.cpp
new file mode 100644
index 0000000..8be7077
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.cpp
@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+
+#include "MockPowerAdvisor.h"
+
+namespace android {
+namespace Hwc2 {
+namespace mock {
+
+// Explicit default instantiation is recommended.
+PowerAdvisor::PowerAdvisor() = default;
+PowerAdvisor::~PowerAdvisor() = default;
+
+} // namespace mock
+} // namespace Hwc2
+} // namespace android
diff --git a/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h
new file mode 100644
index 0000000..dc6d83b
--- /dev/null
+++ b/services/surfaceflinger/tests/unittests/mock/DisplayHardware/MockPowerAdvisor.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright 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 <gmock/gmock.h>
+
+#include "DisplayHardware/PowerAdvisor.h"
+
+namespace android {
+namespace Hwc2 {
+namespace mock {
+
+class PowerAdvisor : public android::Hwc2::PowerAdvisor {
+public:
+    PowerAdvisor();
+    ~PowerAdvisor() override;
+
+    MOCK_METHOD2(setExpensiveRenderingExpected, void(hwc2_display_t displayId, bool expected));
+};
+
+} // namespace mock
+} // namespace Hwc2
+} // namespace android