diff --git a/display/composer/3.1/IQtiComposer.hal b/display/composer/3.1/IQtiComposer.hal
new file mode 100644
index 0000000..8a359ed
--- /dev/null
+++ b/display/composer/3.1/IQtiComposer.hal
@@ -0,0 +1,49 @@
+/*
+* Copyright (c) 2021 The Linux Foundation. All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are
+* met:
+*    * Redistributions of source code must retain the above copyright
+*      notice, this list of conditions and the following disclaimer.
+*    * Redistributions in binary form must reproduce the above
+*      copyright notice, this list of conditions and the following
+*      disclaimer in the documentation and/or other materials provided
+*      with the distribution.
+*    * Neither the name of The Linux Foundation. nor the names of its
+*      contributors may be used to endorse or promote products derived
+*      from this software without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+* IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+package vendor.qti.hardware.display.composer@3.1;
+
+import @3.0::IQtiComposer;
+import IQtiComposerClient;
+import android.hardware.graphics.composer@2.1::Error;
+
+interface IQtiComposer extends @3.0::IQtiComposer {
+    /**
+     * Creates a v3.1 client of the composer.
+     *
+     * @return error is NONE upon success. Otherwise,
+     *         NO_RESOURCES when the client could not be created.
+     * @return client is the newly created client.
+     */
+    @entry
+    @callflow(next="*")
+    createClient_3_1() generates (Error error, IQtiComposerClient client);
+
+};
+
diff --git a/display/composer/3.1/IQtiComposerClient.hal b/display/composer/3.1/IQtiComposerClient.hal
new file mode 100644
index 0000000..4b1103c
--- /dev/null
+++ b/display/composer/3.1/IQtiComposerClient.hal
@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2021 The Linux Foundation. All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *    * Redistributions of source code must retain the above copyright
+ *      notice, this list of conditions and the following disclaimer.
+ *    * Redistributions in binary form must reproduce the above
+ *      copyright notice, this list of conditions and the following
+ *      disclaimer in the documentation and/or other materials provided
+ *      with the distribution.
+ *    * Neither the name of The Linux Foundation. nor the names of its
+ *      contributors may be used to endorse or promote products derived
+ *      from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
+ * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
+ * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+ * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+package vendor.qti.hardware.display.composer@3.1;
+
+import @3.0::IQtiComposerClient;
+import android.hardware.graphics.composer@2.1::Display;
+import android.hardware.graphics.composer@2.1::Error;
+interface IQtiComposerClient extends @3.0::IQtiComposerClient {
+
+    /**
+     * Layer flag to set compatible
+     */
+    enum LayerFlag : uint32_t {
+        DEFAULT = 0,
+        COMPATIBLE = 1,
+    };
+
+    /**
+     * Set draw method
+     */
+    enum DrawMethod : uint32_t {
+        DEFAULT = 0,
+        UNIFIED_DRAW = 1,
+    };
+
+    enum Command : @3.0::IQtiComposerClient.Command {
+        /**
+         * SET_LAYER_FLAG has this pseudo prototype
+         * setLayerFlag(uint32_t type);
+         *
+         * param type is the layer type.
+         *            0 - DEFAULT
+         *            1 - COMPATIBLE
+         */
+
+        SET_LAYER_FLAG_3_1 = 0x803 << IQtiComposerClient.Command:OPCODE_SHIFT,
+        /**
+         * SET_CLIENT_TARGET_3_1 has this pseudo prototype
+         * setClientTarget_3_1(uint32_t targetSlot,
+         *                   int32_t acquireFenceIndex,
+                             uint32_t dataspace,
+                             vec<Rect> damage);
+         * @param targetSlot is input slot for FB
+         * @param acquireFenceIndex is input fence for FB
+         * @param dataspace is current dataspace for FB
+         * @param damage is current surface damage region
+         */
+        SET_CLIENT_TARGET_3_1 = 0x804 << IQtiComposerClient.Command:OPCODE_SHIFT,
+    };
+
+    /**
+     * Set draw method
+     * set the draw method if the composer implementation supports specified draw method.
+     * @ param DrawMethod is enum
+     * @        DEFAULT = 0,
+     * @        UNIFIED_DRAW = 1,
+     */
+    @callflow(next="*")
+    tryDrawMethod(Display display, DrawMethod drawMethod)
+                generates (Error error);
+
+};
+
diff --git a/display/current.txt b/display/current.txt
index 8f64746..d77cbf2 100644
--- a/display/current.txt
+++ b/display/current.txt
@@ -1,4 +1,4 @@
-#Copyright (c) 2018-2020, The Linux Foundation. All rights reserved.
+#Copyright (c) 2018-2021, The Linux Foundation. All rights reserved.
 
 #Redistribution and use in source and binary forms, with or without
 #modification, are permitted provided that the following conditions are
@@ -73,3 +73,5 @@ c85fce19541fb31c8ce4927166a4b50da1e5d50a98594bcaae2f8b2eec12fb7d vendor.qti.hard
 f49205d41f011a96c6d238ea69f7b6c9d159809f4ecabef04ca4ccdb195d57b5 vendor.qti.hardware.display.mapper@4.0::IQtiMapper
 9f484e68c3e4faef0a0f601ff7074d0431499cfaceba43b42fbc35c8264fbddf vendor.qti.hardware.display.mapperextensions@1.2::IQtiMapperExtensions
 fa035077927f2dff68d2b1ad6e6379822d29364999aa3fd70c5d2ffe93707d9b vendor.qti.hardware.display.demura@1.0::IDemuraFileFinder
+e609d77b00158060ca222ccd13e0ba8019a42336e3b6a6a32c6396f7b7ea2077 vendor.qti.hardware.display.composer@3.1::IQtiComposer
+ee6870d17e33bf8e2365165637b75559ceffda57770b1a35f3a9a8bbf3769266 vendor.qti.hardware.display.composer@3.1::IQtiComposerClient