diff --git a/compatibility_matrices/compatibility_matrix.current.xml b/compatibility_matrices/compatibility_matrix.current.xml
index b8676b0..1c89e81 100644
--- a/compatibility_matrices/compatibility_matrix.current.xml
+++ b/compatibility_matrices/compatibility_matrix.current.xml
@@ -198,7 +198,7 @@
     </hal>
     <hal format="hidl" optional="true">
         <name>android.hardware.drm</name>
-        <version>1.3</version>
+        <version>1.3-4</version>
         <interface>
             <name>ICryptoFactory</name>
             <regex-instance>.*</regex-instance>
diff --git a/drm/1.4/Android.bp b/drm/1.4/Android.bp
new file mode 100644
index 0000000..8e1dc93
--- /dev/null
+++ b/drm/1.4/Android.bp
@@ -0,0 +1,20 @@
+// This file is autogenerated by hidl-gen -Landroidbp.
+
+hidl_interface {
+    name: "android.hardware.drm@1.4",
+    root: "android.hardware",
+    srcs: [
+        "ICryptoFactory.hal",
+        "ICryptoPlugin.hal",
+        "IDrmFactory.hal",
+        "IDrmPlugin.hal",
+    ],
+    interfaces: [
+        "android.hardware.drm@1.0",
+        "android.hardware.drm@1.1",
+        "android.hardware.drm@1.2",
+        "android.hardware.drm@1.3",
+        "android.hidl.base@1.0",
+    ],
+    gen_java: false,
+}
diff --git a/drm/1.4/ICryptoFactory.hal b/drm/1.4/ICryptoFactory.hal
new file mode 100644
index 0000000..6cbf9e3
--- /dev/null
+++ b/drm/1.4/ICryptoFactory.hal
@@ -0,0 +1,32 @@
+/*
+ * Copyright (C) 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.hardware.drm@1.4;
+
+import @1.3::ICryptoFactory;
+
+/**
+ * ICryptoFactory is the main entry point for interacting with a vendor's
+ * crypto HAL to create crypto plugins. Crypto plugins create crypto sessions
+ * which are used by a codec to decrypt protected video content.
+ *
+ * The 1.4 factory must always create 1.4 ICryptoPlugin interfaces, which are
+ * returned via the 1.0 createPlugin method.
+ *
+ * To use 1.4 features the caller must cast the returned interface to a
+ * 1.4 HAL, using V1_4::ICryptoPlugin::castFrom().
+ */
+interface ICryptoFactory extends @1.3::ICryptoFactory {
+};
diff --git a/drm/1.4/ICryptoPlugin.hal b/drm/1.4/ICryptoPlugin.hal
new file mode 100644
index 0000000..874ef4c
--- /dev/null
+++ b/drm/1.4/ICryptoPlugin.hal
@@ -0,0 +1,26 @@
+/**
+ * Copyright (C) 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.hardware.drm@1.4;
+
+import @1.2::ICryptoPlugin;
+
+/**
+ * ICryptoPlugin is the HAL for vendor-provided crypto plugins.
+ * It allows crypto sessions to be opened and operated on, to
+ * load crypto keys for a codec to decrypt protected video content.
+ */
+interface ICryptoPlugin extends @1.2::ICryptoPlugin {
+};
diff --git a/drm/1.4/IDrmFactory.hal b/drm/1.4/IDrmFactory.hal
new file mode 100644
index 0000000..035a298
--- /dev/null
+++ b/drm/1.4/IDrmFactory.hal
@@ -0,0 +1,34 @@
+/*
+ * Copyright (C) 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.hardware.drm@1.4;
+
+import @1.3::IDrmFactory;
+
+/**
+ * IDrmFactory is the main entry point for interacting with a vendor's
+ * drm HAL to create drm plugin instances. A drm plugin instance
+ * creates drm sessions which are used to obtain keys for a crypto
+ * session so it can decrypt protected video content.
+ *
+ * The 1.4 factory must always create 1.4 IDrmPlugin interfaces, which are
+ * returned via the 1.0 createPlugin method.
+ *
+ * To use 1.4 features the caller must cast the returned interface to a
+ * 1.4 HAL, using V1_4::IDrmPlugin::castFrom().
+ */
+
+interface IDrmFactory extends @1.3::IDrmFactory {
+};
diff --git a/drm/1.4/IDrmPlugin.hal b/drm/1.4/IDrmPlugin.hal
new file mode 100644
index 0000000..9cc0600
--- /dev/null
+++ b/drm/1.4/IDrmPlugin.hal
@@ -0,0 +1,50 @@
+/**
+ * Copyright (C) 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.hardware.drm@1.4;
+
+import @1.1::SecurityLevel;
+import @1.2::IDrmPlugin;
+
+/**
+ * IDrmPlugin is used to interact with a specific drm plugin that was
+ * created by IDrmFactory::createPlugin. A drm plugin provides methods for
+ * obtaining drm keys to be used by a codec to decrypt protected video
+ * content.
+ */
+interface IDrmPlugin extends @1.2::IDrmPlugin {
+
+    /**
+     * Check if the specified mime-type & security level require a secure decoder
+     * component.
+     *
+     * @param mime The content mime-type
+     * @param level the requested security level
+     * @return secureRequired must be true if and only if a secure decoder is required
+     * for the specified mime-type & security level
+     */
+    requiresSecureDecoder(string mime, @1.1::SecurityLevel level) generates (bool secureRequired);
+
+    /**
+     * Check if the specified mime-type requires a secure decoder component
+     * at the highest security level supported on the device.
+     *
+     * @param mime The content mime-type
+     * @return secureRequired must be true if and only if a secure decoder is required
+     * for the specified mime-type
+     */
+    requiresSecureDecoderDefault(string mime) generates (bool secureRequired);
+
+};