diff --git a/libs/gui/ISurfaceComposer.cpp b/libs/gui/ISurfaceComposer.cpp
index 989abd9..bb8124b 100644
--- a/libs/gui/ISurfaceComposer.cpp
+++ b/libs/gui/ISurfaceComposer.cpp
@@ -935,7 +935,8 @@
         return NO_ERROR;
     }
 
-    status_t setDisplayBrightness(const sp<IBinder>& displayToken, float brightness) override {
+    status_t setDisplayBrightness(const sp<IBinder>& displayToken,
+                                  const gui::DisplayBrightness& brightness) override {
         Parcel data, reply;
         status_t error = data.writeInterfaceToken(ISurfaceComposer::getInterfaceDescriptor());
         if (error != NO_ERROR) {
@@ -947,7 +948,7 @@
             ALOGE("setDisplayBrightness: failed to write display token: %d", error);
             return error;
         }
-        error = data.writeFloat(brightness);
+        error = data.writeParcelable(brightness);
         if (error != NO_ERROR) {
             ALOGE("setDisplayBrightness: failed to write brightness: %d", error);
             return error;
@@ -1832,8 +1833,8 @@
                 ALOGE("setDisplayBrightness: failed to read display token: %d", error);
                 return error;
             }
-            float brightness = -1.0f;
-            error = data.readFloat(&brightness);
+            gui::DisplayBrightness brightness;
+            error = data.readParcelable(&brightness);
             if (error != NO_ERROR) {
                 ALOGE("setDisplayBrightness: failed to read brightness: %d", error);
                 return error;
diff --git a/libs/gui/SurfaceComposerClient.cpp b/libs/gui/SurfaceComposerClient.cpp
index 5e8ab92..6639440 100644
--- a/libs/gui/SurfaceComposerClient.cpp
+++ b/libs/gui/SurfaceComposerClient.cpp
@@ -1998,7 +1998,7 @@
 }
 
 status_t SurfaceComposerClient::setDisplayBrightness(const sp<IBinder>& displayToken,
-                                                     float brightness) {
+                                                     const gui::DisplayBrightness& brightness) {
     return ComposerService::getComposerService()->setDisplayBrightness(displayToken, brightness);
 }
 
diff --git a/libs/gui/aidl/android/gui/DisplayBrightness.aidl b/libs/gui/aidl/android/gui/DisplayBrightness.aidl
new file mode 100644
index 0000000..bdb8c63
--- /dev/null
+++ b/libs/gui/aidl/android/gui/DisplayBrightness.aidl
@@ -0,0 +1,32 @@
+/*
+ * Copyright 2021 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.
+ */
+
+package android.gui;
+
+/** @hide */
+parcelable DisplayBrightness {
+    // Range 0-1f, the desired sdr white point brightness
+    float sdrWhitePoint = 0f;
+
+    // The SDR white point in nits. -1 if unknown
+    float sdrWhitePointNits = -1f;
+
+    // Range 0-1f, the desired brightness of the display itself. -1f to turn the backlight off
+    float displayBrightness = 0f;
+
+    // The desired brightness of the display in nits. -1 if unknown
+    float displayBrightnessNits = -1f;
+}
\ No newline at end of file
diff --git a/libs/gui/include/gui/ISurfaceComposer.h b/libs/gui/include/gui/ISurfaceComposer.h
index 88cfe4b..2a9e3f7 100644
--- a/libs/gui/include/gui/ISurfaceComposer.h
+++ b/libs/gui/include/gui/ISurfaceComposer.h
@@ -16,6 +16,7 @@
 
 #pragma once
 
+#include <android/gui/DisplayBrightness.h>
 #include <android/gui/IFpsListener.h>
 #include <android/gui/IScreenCaptureListener.h>
 #include <android/gui/ITransactionTraceListener.h>
@@ -415,15 +416,15 @@
      * displayToken
      *      The token of the display whose brightness is set.
      * brightness
-     *      A number between 0.0f (minimum brightness) and 1.0 (maximum brightness), or -1.0f to
-     *      turn the backlight off.
+     *      The DisplayBrightness info to set on the desired display.
      *
      * Returns NO_ERROR upon success. Otherwise,
      *      NAME_NOT_FOUND    if the display is invalid, or
      *      BAD_VALUE         if the brightness is invalid, or
      *      INVALID_OPERATION if brightness operations are not supported.
      */
-    virtual status_t setDisplayBrightness(const sp<IBinder>& displayToken, float brightness) = 0;
+    virtual status_t setDisplayBrightness(const sp<IBinder>& displayToken,
+                                          const gui::DisplayBrightness& brightness) = 0;
 
     /*
      * Sends a power boost to the composer. This function is asynchronous.
diff --git a/libs/gui/include/gui/SurfaceComposerClient.h b/libs/gui/include/gui/SurfaceComposerClient.h
index de88943..df37780 100644
--- a/libs/gui/include/gui/SurfaceComposerClient.h
+++ b/libs/gui/include/gui/SurfaceComposerClient.h
@@ -209,7 +209,8 @@
      *      BAD_VALUE         if the brightness value is invalid, or
      *      INVALID_OPERATION if brightness operaetions are not supported.
      */
-    static status_t setDisplayBrightness(const sp<IBinder>& displayToken, float brightness);
+    static status_t setDisplayBrightness(const sp<IBinder>& displayToken,
+                                         const gui::DisplayBrightness& brightness);
 
     /*
      * Sends a power boost to the composer. This function is asynchronous.
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index e8fb71d..8d7f8c9 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -811,7 +811,7 @@
         return NO_ERROR;
     }
     status_t setDisplayBrightness(const sp<IBinder>& /*displayToken*/,
-                                  float /*brightness*/) override {
+                                  const gui::DisplayBrightness& /*brightness*/) override {
         return NO_ERROR;
     }