diff --git a/include/uapi/camera/media/cam_req_mgr.h b/include/uapi/camera/media/cam_req_mgr.h
index b1170004281c..16e495127b28 100644
--- a/include/uapi/camera/media/cam_req_mgr.h
+++ b/include/uapi/camera/media/cam_req_mgr.h
@@ -1,6 +1,6 @@
 /* SPDX-License-Identifier: GPL-2.0-only WITH Linux-syscall-note */
 /*
- * Copyright (c) 2016-2019, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
  */
 
 #ifndef __UAPI_LINUX_CAM_REQ_MGR_H
@@ -53,6 +53,7 @@
 #define V4L_EVENT_CAM_REQ_MGR_SOF            0
 #define V4L_EVENT_CAM_REQ_MGR_ERROR          1
 #define V4L_EVENT_CAM_REQ_MGR_SOF_BOOT_TS    2
+#define V4L_EVENT_CAM_REQ_MGR_CUSTOM_EVT     3
 
 /* SOF Event status */
 #define CAM_REQ_MGR_SOF_EVENT_SUCCESS           0
@@ -461,11 +462,29 @@ struct cam_req_mgr_frame_msg {
 	uint32_t reserved;
 };
 
+/**
+ * struct cam_req_mgr_custom_msg
+ * @custom_type: custom type
+ * @request_id: request id of the frame
+ * @frame_id: frame id of the frame
+ * @timestamp: timestamp of the frame
+ * @link_hdl: link handle associated with this message
+ * @custom_data: custom data
+ */
+struct cam_req_mgr_custom_msg {
+	uint32_t custom_type;
+	uint64_t request_id;
+	uint64_t frame_id;
+	uint64_t timestamp;
+	int32_t  link_hdl;
+	uint64_t custom_data;
+};
+
 /**
  * struct cam_req_mgr_message
  * @session_hdl: session to which the frame belongs to
  * @reserved: reserved field
- * @u: union which can either be error or frame message
+ * @u: union which can either be error/frame/custom message
  */
 struct cam_req_mgr_message {
 	int32_t session_hdl;
@@ -473,6 +492,7 @@ struct cam_req_mgr_message {
 	union {
 		struct cam_req_mgr_error_msg err_msg;
 		struct cam_req_mgr_frame_msg frame_msg;
+		struct cam_req_mgr_custom_msg custom_msg;
 	} u;
 };
 #endif /* __UAPI_LINUX_CAM_REQ_MGR_H */