| /* 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, |
| acpi_backlight_nvidia_wmi_ec, |
| acpi_backlight_apple_gmux, |
| }; |
| |
| #if IS_ENABLED(CONFIG_ACPI_VIDEO) |
| extern int acpi_video_register(void); |
| extern void acpi_video_unregister(void); |
| extern void acpi_video_register_backlight(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 bool acpi_video_backlight_use_native(void); |
| /* |
| * 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 void acpi_video_register_backlight(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 bool acpi_video_backlight_use_native(void) |
| { |
| return true; |
| } |
| 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 |