4 #include <linux/errno.h> /* for ENODEV */
5 #include <linux/types.h> /* for bool */
7 struct acpi_video_brightness_flags {
8 u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
9 u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
10 u8 _BQC_use_index:1; /* _BQC returns an index value */
13 struct acpi_video_device_brightness {
17 struct acpi_video_brightness_flags flags;
22 #define ACPI_VIDEO_CLASS "video"
24 #define ACPI_VIDEO_DISPLAY_CRT 1
25 #define ACPI_VIDEO_DISPLAY_TV 2
26 #define ACPI_VIDEO_DISPLAY_DVI 3
27 #define ACPI_VIDEO_DISPLAY_LCD 4
29 #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
30 #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110
31 #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200
33 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80
34 #define ACPI_VIDEO_NOTIFY_PROBE 0x81
35 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82
36 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
37 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
38 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
39 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
40 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
41 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
42 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
44 enum acpi_backlight_type {
45 acpi_backlight_undef = -1,
46 acpi_backlight_none = 0,
48 acpi_backlight_vendor,
49 acpi_backlight_native,
52 #if IS_ENABLED(CONFIG_ACPI_VIDEO)
53 extern int acpi_video_register(void);
54 extern void acpi_video_unregister(void);
55 extern int acpi_video_get_edid(struct acpi_device *device, int type,
56 int device_id, void **edid);
57 extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
58 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
60 * Note: The value returned by acpi_video_handles_brightness_key_presses()
61 * may change over time and should not be cached.
63 extern bool acpi_video_handles_brightness_key_presses(void);
64 extern int acpi_video_get_levels(struct acpi_device *device,
65 struct acpi_video_device_brightness **dev_br,
68 static inline int acpi_video_register(void) { return -ENODEV; }
69 static inline void acpi_video_unregister(void) { return; }
70 static inline int acpi_video_get_edid(struct acpi_device *device, int type,
71 int device_id, void **edid)
75 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
77 return acpi_backlight_vendor;
79 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
82 static inline bool acpi_video_handles_brightness_key_presses(void)
86 static inline int acpi_video_get_levels(struct acpi_device *device,
87 struct acpi_video_device_brightness **dev_br,