diff --git a/drm/1.4/Android.bp b/drm/1.4/Android.bp
index 8e1dc93c9f..f40ff87b13 100644
--- a/drm/1.4/Android.bp
+++ b/drm/1.4/Android.bp
@@ -8,6 +8,7 @@ hidl_interface {
         "ICryptoPlugin.hal",
         "IDrmFactory.hal",
         "IDrmPlugin.hal",
+        "types.hal",
     ],
     interfaces: [
         "android.hardware.drm@1.0",
diff --git a/drm/1.4/ICryptoPlugin.hal b/drm/1.4/ICryptoPlugin.hal
index 874ef4cd3b..addfdd08d9 100644
--- a/drm/1.4/ICryptoPlugin.hal
+++ b/drm/1.4/ICryptoPlugin.hal
@@ -16,6 +16,8 @@
 package android.hardware.drm@1.4;
 
 import @1.2::ICryptoPlugin;
+import @1.4::LogMessage;
+import @1.4::Status;
 
 /**
  * ICryptoPlugin is the HAL for vendor-provided crypto plugins.
@@ -23,4 +25,15 @@ import @1.2::ICryptoPlugin;
  * load crypto keys for a codec to decrypt protected video content.
  */
 interface ICryptoPlugin extends @1.2::ICryptoPlugin {
+
+    /**
+     * @return logMessages latest plugin level log messages. Can be used
+     *     by apps in diagnosis of errors.
+     * @return status the status of the call. The status must be:
+     *     OK on success;
+     *     GENERAL_OEM_ERROR on OEM-provided, low-level component failures;
+     *     GENERAL_PLUGIN_ERROR on unexpected plugin-level errors.
+     */
+    getLogMessages() generates (@1.4::Status status, vec<LogMessage> logMessages);
+
 };
diff --git a/drm/1.4/IDrmPlugin.hal b/drm/1.4/IDrmPlugin.hal
index e8af230033..df04b9f226 100644
--- a/drm/1.4/IDrmPlugin.hal
+++ b/drm/1.4/IDrmPlugin.hal
@@ -19,6 +19,8 @@ import @1.0::Status;
 import @1.0::SessionId;
 import @1.1::SecurityLevel;
 import @1.2::IDrmPlugin;
+import @1.4::LogMessage;
+import @1.4::Status;
 
 /**
  * IDrmPlugin is used to interact with a specific drm plugin that was
@@ -61,4 +63,14 @@ interface IDrmPlugin extends @1.2::IDrmPlugin {
      */
     setPlaybackId(SessionId sessionId, string playbackId) generates (@1.0::Status status);
 
+    /**
+     * @return logMessages latest plugin level log messages. Can be used
+     *     by apps in diagnosis of errors.
+     * @return status the status of the call. The status must be:
+     *     OK on success;
+     *     GENERAL_OEM_ERROR on OEM-provided, low-level component failures;
+     *     GENERAL_PLUGIN_ERROR on unexpected plugin-level errors.
+     */
+    getLogMessages() generates (@1.4::Status status, vec<LogMessage> logMessages);
+
 };
diff --git a/drm/1.4/types.hal b/drm/1.4/types.hal
new file mode 100644
index 0000000000..706c3aa92a
--- /dev/null
+++ b/drm/1.4/types.hal
@@ -0,0 +1,51 @@
+/**
+ * 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::Status;
+
+enum LogPriority : uint32_t {
+  ERROR,
+  WARN,
+  INFO,
+  DEBUG,
+  VERBOSE
+};
+
+/**
+ * Returned by getLogMessages to report error diagnostics to the
+ * app.
+ */
+struct LogMessage {
+  int64_t timeMs;
+  LogPriority priority;
+  string message;
+};
+
+enum Status : @1.2::Status {
+
+    /**
+     * Non-specific error reported by the device OEM subsystem.
+     */
+    GENERAL_OEM_ERROR,
+
+    /**
+     * Unexpected internal failure in the drm/crypto plugin.
+     */
+    GENERAL_PLUGIN_ERROR,
+
+};