diff --git a/tv/cec/1.1/Android.bp b/tv/cec/1.1/Android.bp
new file mode 100644
index 0000000..c2d4e54
--- /dev/null
+++ b/tv/cec/1.1/Android.bp
@@ -0,0 +1,16 @@
+// This file is autogenerated by hidl-gen -Landroidbp.
+
+hidl_interface {
+    name: "android.hardware.tv.cec@1.1",
+    root: "android.hardware",
+    srcs: [
+        "types.hal",
+        "IHdmiCec.hal",
+        "IHdmiCecCallback.hal",
+    ],
+    interfaces: [
+        "android.hardware.tv.cec@1.0",
+        "android.hidl.base@1.0",
+    ],
+    gen_java: true,
+}
diff --git a/tv/cec/1.1/IHdmiCec.hal b/tv/cec/1.1/IHdmiCec.hal
new file mode 100644
index 0000000..fe7bedf
--- /dev/null
+++ b/tv/cec/1.1/IHdmiCec.hal
@@ -0,0 +1,70 @@
+/*
+ * 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.tv.cec@1.1;
+
+import @1.0::IHdmiCec;
+import @1.0::Result;
+import @1.0::SendMessageResult;
+
+import IHdmiCecCallback;
+
+/**
+ * HDMI-CEC HAL interface definition.
+ */
+interface IHdmiCec extends @1.0::IHdmiCec {
+    /**
+     * Passes the logical address that must be used in this system.
+     *
+     * HAL must use it to configure the hardware so that the CEC commands
+     * addressed the given logical address can be filtered in. This method must
+     * be able to be called as many times as necessary in order to support
+     * multiple logical devices.
+     *
+     * @param addr Logical address that must be used in this system. It must be
+     *        in the range of valid logical addresses for the call to succeed.
+     * @return result Result status of the operation. SUCCESS if successful,
+     *         FAILURE_INVALID_ARGS if the given logical address is invalid,
+     *         FAILURE_BUSY if device or resource is busy
+     */
+    addLogicalAddress_1_1(CecLogicalAddress addr) generates (Result result);
+
+    /**
+     * Transmits HDMI-CEC message to other HDMI device.
+     *
+     * The method must be designed to return in a certain amount of time and not
+     * hanging forever which may happen if CEC signal line is pulled low for
+     * some reason.
+     *
+     * It must try retransmission at least once as specified in the section '7.1
+     * Frame Re-transmissions' of the CEC Spec 1.4b.
+     *
+     * @param message CEC message to be sent to other HDMI device.
+     * @return result Result status of the operation. SUCCESS if successful,
+     *         NACK if the sent message is not acknowledged,
+     *         BUSY if the CEC bus is busy.
+     */
+    sendMessage_1_1(CecMessage message) generates (SendMessageResult result);
+
+    /**
+     * Sets a callback that HDMI-CEC HAL must later use for incoming CEC
+     * messages or internal HDMI events.
+     *
+     * @param callback Callback object to pass hdmi events to the system. The
+     *        previously registered callback must be replaced with this one.
+     */
+    setCallback_1_1(IHdmiCecCallback callback);
+};
diff --git a/tv/cec/1.1/IHdmiCecCallback.hal b/tv/cec/1.1/IHdmiCecCallback.hal
new file mode 100644
index 0000000..3928f18
--- /dev/null
+++ b/tv/cec/1.1/IHdmiCecCallback.hal
@@ -0,0 +1,30 @@
+/*
+ * 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.tv.cec@1.1;
+
+import @1.0::IHdmiCecCallback;
+
+/**
+ * Callbacks from the HAL implementation to notify the system of new events.
+ */
+interface IHdmiCecCallback extends @1.0::IHdmiCecCallback {
+    /**
+     * The callback function that must be called by HAL implementation to notify
+     * the system of new CEC message arrival.
+     */
+    oneway onCecMessage_1_1(CecMessage message);
+};
diff --git a/tv/cec/1.1/types.hal b/tv/cec/1.1/types.hal
new file mode 100644
index 0000000..a117519
--- /dev/null
+++ b/tv/cec/1.1/types.hal
@@ -0,0 +1,45 @@
+/*
+ * 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.tv.cec@1.1;
+
+import @1.0::CecLogicalAddress;
+import @1.0::CecMessageType;
+
+enum CecLogicalAddress : @1.0::CecLogicalAddress {
+    BACKUP_1 = 12,
+    BACKUP_2 = 13,
+};
+
+enum CecMessageType : @1.0::CecMessageType {
+    GIVE_FEATURES = 0xA5,
+    REPORT_FEATURES = 0xA6,
+    REQUEST_CURRENT_LATENCY = 0xA7,
+    REPORT_CURRENT_LATENCY = 0xA8,
+};
+
+struct CecMessage {
+    /** logical address of the initiator */
+    CecLogicalAddress initiator;
+
+    /** logical address of destination */
+    CecLogicalAddress destination;
+
+    /**
+     * The maximum size of body is 15 (MaxLength::MESSAGE_BODY) as specified in
+     * the section 6 of the CEC Spec 1.4b. Overflowed data must be ignored. */
+    vec<uint8_t> body;
+};