/* SPDX-License-Identifier: GPL-2.0 */ #ifndef __ACPI_VIDEO_H #define __ACPI_VIDEO_H #include <linux/errno.h> /* for ENODEV */ #include <linux/types.h> /* for bool */ struct acpi_video_brightness_flags { u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */ u8 _BCL_reversed:1; /* _BCL package is in a reversed order */ u8 _BQC_use_index:1; /* _BQC returns an index value */ }; struct acpi_video_device_brightness { int curr; int count; int *levels; struct acpi_video_brightness_flags flags; }; struct acpi_device; #define ACPI_VIDEO_CLASS "video" #define ACPI_VIDEO_DISPLAY_CRT 1 #define ACPI_VIDEO_DISPLAY_TV 2 #define ACPI_VIDEO_DISPLAY_DVI 3 #define ACPI_VIDEO_DISPLAY_LCD 4 #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100 #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110 #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200 #define ACPI_VIDEO_NOTIFY_SWITCH 0x80 #define ACPI_VIDEO_NOTIFY_PROBE 0x81 #define ACPI_VIDEO_NOTIFY_CYCLE 0x82 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89 enum acpi_backlight_type { acpi_backlight_undef = -1, acpi_backlight_none = 0, acpi_backlight_video, acpi_backlight_vendor, acpi_backlight_native, }; #if IS_ENABLED(CONFIG_ACPI_VIDEO) extern int acpi_video_register(void); extern void acpi_video_unregister(void); extern int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, void **edid); extern enum acpi_backlight_type acpi_video_get_backlight_type(void); extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); /* * Note: The value returned by acpi_video_handles_brightness_key_presses() * may change over time and should not be cached. */ extern bool acpi_video_handles_brightness_key_presses(void); extern int acpi_video_get_levels(struct acpi_device *device, struct acpi_video_device_brightness **dev_br, int *pmax_level); #else static inline int acpi_video_register(void) { return -ENODEV; } static inline void acpi_video_unregister(void) { return; } static inline int acpi_video_get_edid(struct acpi_device *device, int type, int device_id, void **edid) { return -ENODEV; } static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) { return acpi_backlight_vendor; } static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) { } static inline bool acpi_video_handles_brightness_key_presses(void) { return false; } static inline int acpi_video_get_levels(struct acpi_device *device, struct acpi_video_device_brightness **dev_br, int *pmax_level) { return -ENODEV; } #endif #endif