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 extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
62 extern bool acpi_video_backlight_use_native(void);
63 /*
64 * Note: The value returned by acpi_video_handles_brightness_key_presses()
65 * may change over time and should not be cached.
66 */
67 extern bool acpi_video_handles_brightness_key_presses(void);
68 extern int acpi_video_get_levels(struct acpi_device *device,
69 struct acpi_video_device_brightness **dev_br,
70 int *pmax_level);
71 #else
acpi_video_register(void)72 static inline int acpi_video_register(void) { return -ENODEV; }
acpi_video_unregister(void)73 static inline void acpi_video_unregister(void) { return; }
acpi_video_register_backlight(void)74 static inline void acpi_video_register_backlight(void) { return; }
acpi_video_get_edid(struct acpi_device * device,int type,int device_id,void ** edid)75 static inline int acpi_video_get_edid(struct acpi_device *device, int type,
76 int device_id, void **edid)
77 {
78 return -ENODEV;
79 }
acpi_video_get_backlight_type(void)80 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
81 {
82 return acpi_backlight_vendor;
83 }
acpi_video_backlight_use_native(void)84 static inline bool acpi_video_backlight_use_native(void)
85 {
86 return true;
87 }
acpi_video_handles_brightness_key_presses(void)88 static inline bool acpi_video_handles_brightness_key_presses(void)
89 {
90 return false;
91 }
acpi_video_get_levels(struct acpi_device * device,struct acpi_video_device_brightness ** dev_br,int * pmax_level)92 static inline int acpi_video_get_levels(struct acpi_device *device,
93 struct acpi_video_device_brightness **dev_br,
94 int *pmax_level)
95 {
96 return -ENODEV;
97 }
98 #endif
99
100 #endif
101
