1 | /* SPDX-License-Identifier: GPL-2.0 */ |
2 | #ifndef __ACPI_VIDEO_H |
3 | #define __ACPI_VIDEO_H |
4 | |
5 | #include <linux/errno.h> /* for ENODEV */ |
6 | #include <linux/types.h> /* for bool */ |
7 | |
8 | struct acpi_video_brightness_flags { |
9 | u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ |
10 | u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ |
11 | u8 _BQC_use_index:1; /* _BQC returns an index value */ |
12 | }; |
13 | |
14 | struct acpi_video_device_brightness { |
15 | int curr; |
16 | int count; |
17 | int *levels; |
18 | struct acpi_video_brightness_flags flags; |
19 | }; |
20 | |
21 | struct acpi_device; |
22 | |
23 | #define ACPI_VIDEO_CLASS "video" |
24 | |
25 | #define ACPI_VIDEO_DISPLAY_CRT 1 |
26 | #define ACPI_VIDEO_DISPLAY_TV 2 |
27 | #define ACPI_VIDEO_DISPLAY_DVI 3 |
28 | #define ACPI_VIDEO_DISPLAY_LCD 4 |
29 | |
30 | #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100 |
31 | #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110 |
32 | #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200 |
33 | |
34 | #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 |
35 | #define ACPI_VIDEO_NOTIFY_PROBE 0x81 |
36 | #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 |
37 | #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 |
38 | #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 |
39 | #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 |
40 | #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 |
41 | #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 |
42 | #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 |
43 | #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 |
44 | |
45 | enum acpi_backlight_type { |
46 | acpi_backlight_undef = -1, |
47 | acpi_backlight_none = 0, |
48 | acpi_backlight_video, |
49 | acpi_backlight_vendor, |
50 | acpi_backlight_native, |
51 | acpi_backlight_nvidia_wmi_ec, |
52 | acpi_backlight_apple_gmux, |
53 | }; |
54 | |
55 | #if IS_ENABLED(CONFIG_ACPI_VIDEO) |
56 | extern int acpi_video_register(void); |
57 | extern void acpi_video_unregister(void); |
58 | extern void acpi_video_register_backlight(void); |
59 | extern int acpi_video_get_edid(struct acpi_device *device, int type, |
60 | int device_id, void **edid); |
61 | /* |
62 | * Note: The value returned by acpi_video_handles_brightness_key_presses() |
63 | * may change over time and should not be cached. |
64 | */ |
65 | extern bool acpi_video_handles_brightness_key_presses(void); |
66 | extern int acpi_video_get_levels(struct acpi_device *device, |
67 | struct acpi_video_device_brightness **dev_br, |
68 | int *pmax_level); |
69 | |
70 | extern enum acpi_backlight_type __acpi_video_get_backlight_type(bool native, |
71 | bool *auto_detect); |
72 | |
73 | static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) |
74 | { |
75 | return __acpi_video_get_backlight_type(native: false, NULL); |
76 | } |
77 | |
78 | static inline bool acpi_video_backlight_use_native(void) |
79 | { |
80 | return __acpi_video_get_backlight_type(native: true, NULL) == acpi_backlight_native; |
81 | } |
82 | #else |
83 | static inline int acpi_video_register(void) { return -ENODEV; } |
84 | static inline void acpi_video_unregister(void) { return; } |
85 | static inline void acpi_video_register_backlight(void) { return; } |
86 | static inline int acpi_video_get_edid(struct acpi_device *device, int type, |
87 | int device_id, void **edid) |
88 | { |
89 | return -ENODEV; |
90 | } |
91 | static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) |
92 | { |
93 | return acpi_backlight_vendor; |
94 | } |
95 | static inline bool acpi_video_backlight_use_native(void) |
96 | { |
97 | return true; |
98 | } |
99 | static inline bool acpi_video_handles_brightness_key_presses(void) |
100 | { |
101 | return false; |
102 | } |
103 | static inline int acpi_video_get_levels(struct acpi_device *device, |
104 | struct acpi_video_device_brightness **dev_br, |
105 | int *pmax_level) |
106 | { |
107 | return -ENODEV; |
108 | } |
109 | #endif |
110 | |
111 | #endif |
112 | |