diff --git a/Makefile.am b/Makefile.am
index 5be2800..9820085 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -24,6 +24,7 @@
 	unstable/linux-explicit-synchronization/linux-explicit-synchronization-unstable-v1.xml \
 	unstable/primary-selection/primary-selection-unstable-v1.xml		\
 	unstable/alpha-compositing/alpha-compositing-unstable-v1.xml	\
+	unstable/hdr10-metadata/hdr10-metadata-unstable-v1.xml	\
 	$(NULL)
 
 stable_protocols =								\
diff --git a/unstable/hdr10-metadata/README b/unstable/hdr10-metadata/README
new file mode 100644
index 0000000..58a82f8
--- /dev/null
+++ b/unstable/hdr10-metadata/README
@@ -0,0 +1,4 @@
+hdr10 metadata protocol
+
+Maintainers:
+Jared Hu <Jared Hu at nxp.com>
diff --git a/unstable/hdr10-metadata/hdr10-metadata-unstable-v1.xml b/unstable/hdr10-metadata/hdr10-metadata-unstable-v1.xml
new file mode 100644
index 0000000..5b1bac4
--- /dev/null
+++ b/unstable/hdr10-metadata/hdr10-metadata-unstable-v1.xml
@@ -0,0 +1,84 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<protocol name="hdr10_metadata_unstable_v1">
+
+  <copyright>
+    Copyright 2018 NXP
+
+    Permission is hereby granted, free of charge, to any person obtaining a
+    copy of this software and associated documentation files (the "Software"),
+    to deal in the Software without restriction, including without limitation
+    the rights to use, copy, modify, merge, publish, distribute, sublicense,
+    and/or sell copies of the Software, and to permit persons to whom the
+    Software is furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice (including the next
+    paragraph) shall be included in all copies or substantial portions of the
+    Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+    THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+    DEALINGS IN THE SOFTWARE.
+  </copyright>
+
+  <description summary="Protocol for sending hdr10 metadata to compositor">
+    This protocol specifies a set of interfaces used to set and control
+    hdr10 metadata of video contents.
+
+    Warning! The protocol described in this file is experimental and backward
+    incompatible changes may be made. Backward compatible changes may be added
+    together with the corresponding interface version bump. Backward
+    incompatible changes are done by bumping the version number in the protocol
+    and interface names and resetting the interface version. Once the protocol
+    is to be declared stable, the 'z' prefix and the version number in the
+    protocol and interface names are removed and the interface version number is
+    reset.
+  </description>
+
+  <interface name="zwp_hdr10_metadata_v1" version="1">
+    <description summary="hdr10_metadata">
+      The global interface exposing hdr10 metadata capabilities is
+      used to instantiate an interface extension for compositor.
+      This extended interface will then allow the client to pass hdr10 metadata
+      to compositor and send to display driver if supported.
+    </description>
+
+    <request name="destroy" type="destructor">
+      <description summary="unbind from the hdr10 metadata interface">
+        Informs the server that the client will not be using this
+        protocol object anymore. This does not affect any other objects.
+      </description>
+    </request>
+
+    <enum name="error">
+      <entry name="sending_meta_error" value="0"
+             summary="error occurs when compositor handle metadata"/>
+    </enum>
+
+    <request name="set_metadata">
+      <description summary="interface of setting and controling hdr10 metadata">
+        client can use this interface pass hdr10 metadata to server. Server need
+        use the recived metadata to enable hdr mode.
+      </description>
+
+      <arg name="eotf" type="uint" summary="supported eotf"/>
+      <arg name="type" type="uint" summary="supported type"/>
+      <arg name="display_primaries_red" type="uint"
+        summary="display primaries of red, high 16bits for x, and low 16bits for y"/>
+      <arg name="display_primaries_green" type="uint"
+        summary="display primaries of green, high 16bits for x, and low 16bits for y"/>
+      <arg name="display_primaries_blue" type="uint"
+        summary="display primaries of blue, high 16bits for x, and low 16bits for y"/>
+      <arg name="white_point" type="uint"
+        summary="white point, high 16bits for x, and low 16bits for blue"/>
+      <arg name="mastering_display_luminance" type="uint"
+        summary="max and min mastering display luminance, high 16 bits for max, and low 16 bits for min"/>
+      <arg name="max_cll" type="uint" summary="max content light level"/>
+      <arg name="max_fall" type="uint" summary="max frame average light level"/>
+    </request>
+  </interface>
+
+</protocol>