diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 4372e16..6c9d81a 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -955,6 +955,27 @@
         }
         return NO_ERROR;
     }
+
+    virtual status_t notifyPowerHint(int32_t hintId) {
+        Parcel data, reply;
+        status_t error = data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
+        if (error != NO_ERROR) {
+            ALOGE("notifyPowerHint: failed to write interface token: %d", error);
+            return error;
+        }
+        error = data.writeInt32(hintId);
+        if (error != NO_ERROR) {
+            ALOGE("notifyPowerHint: failed to write hintId: %d", error);
+            return error;
+        }
+        error = remote()->transact(BnSurfaceComposer::NOTIFY_POWER_HINT, data, &reply,
+                                   IBinder::FLAG_ONEWAY);
+        if (error != NO_ERROR) {
+            ALOGE("notifyPowerHint: failed to transact: %d", error);
+            return error;
+        }
+        return NO_ERROR;
+    }
 };
 
 // Out-of-line virtual method definition to trigger vtable emission in this
@@ -1556,6 +1577,16 @@
             }
             return setDisplayBrightness(displayToken, brightness);
         }
+        case NOTIFY_POWER_HINT: {
+            CHECK_INTERFACE(ISurfaceComposer, data, reply);
+            int32_t hintId;
+            status_t error = data.readInt32(&hintId);
+            if (error != NO_ERROR) {
+                ALOGE("notifyPowerHint: failed to read hintId: %d", error);
+                return error;
+            }
+            return notifyPowerHint(hintId);
+        }
         default: {
             return BBinder::onTransact(code, data, reply, flags);
         }
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 5d4367d..1033d3d 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -1543,6 +1543,10 @@
     return ComposerService::getComposerService()->setDisplayBrightness(displayToken, brightness);
 }
 
+status_t SurfaceComposerClient::notifyPowerHint(int32_t hintId) {
+    return ComposerService::getComposerService()->notifyPowerHint(hintId);
+}
+
 // ----------------------------------------------------------------------------
 
 status_t ScreenshotClient::capture(const sp<IBinder>& display, const ui::Dataspace reqDataSpace,
diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index fd67754..e2f7736 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -425,6 +425,16 @@
      */
     virtual status_t setDisplayBrightness(const sp<IBinder>& displayToken,
                                           float brightness) const = 0;
+
+    /*
+     * Sends a power hint to the composer. This function is asynchronous.
+     *
+     * hintId
+     *      hint id according to android::hardware::power::V1_0::PowerHint
+     *
+     * Returns NO_ERROR upon success.
+     */
+    virtual status_t notifyPowerHint(int32_t hintId) = 0;
 };
 
 // ----------------------------------------------------------------------------
@@ -477,6 +487,7 @@
         GET_DISPLAY_BRIGHTNESS_SUPPORT,
         SET_DISPLAY_BRIGHTNESS,
         CAPTURE_SCREEN_BY_ID,
+        NOTIFY_POWER_HINT,
         // Always append new enum to the end.
     };
 
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index a038838..0e17c7b 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -201,6 +201,16 @@
      */
     static status_t setDisplayBrightness(const sp<IBinder>& displayToken, float brightness);
 
+    /*
+     * Sends a power hint to the composer. This function is asynchronous.
+     *
+     * hintId
+     *      hint id according to android::hardware::power::V1_0::PowerHint
+     *
+     * Returns NO_ERROR upon success.
+     */
+    static status_t notifyPowerHint(int32_t hintId);
+
     // ------------------------------------------------------------------------
     // surface creation / destruction
 
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index db97fae..960cf18 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -704,6 +704,7 @@
                                       std::vector<int32_t>* /*outAllowedConfigs*/) override {
         return NO_ERROR;
     }
+    status_t notifyPowerHint(int32_t /*hintId*/) override { return NO_ERROR; }
 
 protected:
     IBinder* onAsBinder() override { return nullptr; }