1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * AMD Platform Management Framework Interface
4  *
5  * Copyright (c) 2023, Advanced Micro Devices, Inc.
6  * All Rights Reserved.
7  *
8  * Authors: Shyam Sundar S K <Shyam-sundar.S-k@amd.com>
9  *          Basavaraj Natikar <Basavaraj.Natikar@amd.com>
10  */
11 
12 #ifndef AMD_PMF_IO_H
13 #define AMD_PMF_IO_H
14 
15 #include <linux/types.h>
16 
17 /**
18  * enum sfh_message_type - Query the SFH message type
19  * @MT_HPD: Message ID to know the Human presence info from MP2 FW
20  * @MT_ALS: Message ID to know the Ambient light info from MP2 FW
21  */
22 enum sfh_message_type {
23 	MT_HPD,
24 	MT_ALS,
25 };
26 
27 /**
28  * enum sfh_hpd_info - Query the Human presence information
29  * @SFH_NOT_DETECTED: Check the HPD connection information from MP2 FW
30  * @SFH_USER_PRESENT: Check if the user is present from HPD sensor
31  * @SFH_USER_AWAY: Check if the user is away from HPD sensor
32  */
33 enum sfh_hpd_info {
34 	SFH_NOT_DETECTED,
35 	SFH_USER_PRESENT,
36 	SFH_USER_AWAY,
37 };
38 
39 /**
40  * struct amd_sfh_info - get HPD sensor info from MP2 FW
41  * @ambient_light: Populates the ambient light information
42  * @user_present: Populates the user presence information
43  */
44 struct amd_sfh_info {
45 	u32 ambient_light;
46 	u8 user_present;
47 };
48 
49 int amd_get_sfh_info(struct amd_sfh_info *sfh_info, enum sfh_message_type op);
50 #endif
51