1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0 */
2*4882a593Smuzhiyun #ifndef __ACPI_VIDEO_H
3*4882a593Smuzhiyun #define __ACPI_VIDEO_H
4*4882a593Smuzhiyun
5*4882a593Smuzhiyun #include <linux/errno.h> /* for ENODEV */
6*4882a593Smuzhiyun #include <linux/types.h> /* for bool */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun struct acpi_video_brightness_flags {
9*4882a593Smuzhiyun u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
10*4882a593Smuzhiyun u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
11*4882a593Smuzhiyun u8 _BQC_use_index:1; /* _BQC returns an index value */
12*4882a593Smuzhiyun };
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun struct acpi_video_device_brightness {
15*4882a593Smuzhiyun int curr;
16*4882a593Smuzhiyun int count;
17*4882a593Smuzhiyun int *levels;
18*4882a593Smuzhiyun struct acpi_video_brightness_flags flags;
19*4882a593Smuzhiyun };
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct acpi_device;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun #define ACPI_VIDEO_CLASS "video"
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_CRT 1
26*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_TV 2
27*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_DVI 3
28*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_LCD 4
29*4882a593Smuzhiyun
30*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
31*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110
32*4882a593Smuzhiyun #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200
33*4882a593Smuzhiyun
34*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
35*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_PROBE 0x81
36*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
37*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
38*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
39*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
40*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
41*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
42*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
43*4882a593Smuzhiyun #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
44*4882a593Smuzhiyun
45*4882a593Smuzhiyun enum acpi_backlight_type {
46*4882a593Smuzhiyun acpi_backlight_undef = -1,
47*4882a593Smuzhiyun acpi_backlight_none = 0,
48*4882a593Smuzhiyun acpi_backlight_video,
49*4882a593Smuzhiyun acpi_backlight_vendor,
50*4882a593Smuzhiyun acpi_backlight_native,
51*4882a593Smuzhiyun };
52*4882a593Smuzhiyun
53*4882a593Smuzhiyun #if IS_ENABLED(CONFIG_ACPI_VIDEO)
54*4882a593Smuzhiyun extern int acpi_video_register(void);
55*4882a593Smuzhiyun extern void acpi_video_unregister(void);
56*4882a593Smuzhiyun extern int acpi_video_get_edid(struct acpi_device *device, int type,
57*4882a593Smuzhiyun int device_id, void **edid);
58*4882a593Smuzhiyun extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
59*4882a593Smuzhiyun extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
60*4882a593Smuzhiyun /*
61*4882a593Smuzhiyun * Note: The value returned by acpi_video_handles_brightness_key_presses()
62*4882a593Smuzhiyun * may change over time and should not be cached.
63*4882a593Smuzhiyun */
64*4882a593Smuzhiyun extern bool acpi_video_handles_brightness_key_presses(void);
65*4882a593Smuzhiyun extern int acpi_video_get_levels(struct acpi_device *device,
66*4882a593Smuzhiyun struct acpi_video_device_brightness **dev_br,
67*4882a593Smuzhiyun int *pmax_level);
68*4882a593Smuzhiyun #else
acpi_video_register(void)69*4882a593Smuzhiyun static inline int acpi_video_register(void) { return -ENODEV; }
acpi_video_unregister(void)70*4882a593Smuzhiyun static inline void acpi_video_unregister(void) { return; }
acpi_video_get_edid(struct acpi_device * device,int type,int device_id,void ** edid)71*4882a593Smuzhiyun static inline int acpi_video_get_edid(struct acpi_device *device, int type,
72*4882a593Smuzhiyun int device_id, void **edid)
73*4882a593Smuzhiyun {
74*4882a593Smuzhiyun return -ENODEV;
75*4882a593Smuzhiyun }
acpi_video_get_backlight_type(void)76*4882a593Smuzhiyun static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
77*4882a593Smuzhiyun {
78*4882a593Smuzhiyun return acpi_backlight_vendor;
79*4882a593Smuzhiyun }
acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)80*4882a593Smuzhiyun static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
81*4882a593Smuzhiyun {
82*4882a593Smuzhiyun }
acpi_video_handles_brightness_key_presses(void)83*4882a593Smuzhiyun static inline bool acpi_video_handles_brightness_key_presses(void)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun return false;
86*4882a593Smuzhiyun }
acpi_video_get_levels(struct acpi_device * device,struct acpi_video_device_brightness ** dev_br,int * pmax_level)87*4882a593Smuzhiyun static inline int acpi_video_get_levels(struct acpi_device *device,
88*4882a593Smuzhiyun struct acpi_video_device_brightness **dev_br,
89*4882a593Smuzhiyun int *pmax_level)
90*4882a593Smuzhiyun {
91*4882a593Smuzhiyun return -ENODEV;
92*4882a593Smuzhiyun }
93*4882a593Smuzhiyun #endif
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun #endif
96