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 }; 52 53 #if IS_ENABLED(CONFIG_ACPI_VIDEO) 54 extern int acpi_video_register(void); 55 extern void acpi_video_unregister(void); 56 extern int acpi_video_get_edid(struct acpi_device *device, int type, 57 int device_id, void **edid); 58 extern enum acpi_backlight_type acpi_video_get_backlight_type(void); 59 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); 60 /* 61 * Note: The value returned by acpi_video_handles_brightness_key_presses() 62 * may change over time and should not be cached. 63 */ 64 extern bool acpi_video_handles_brightness_key_presses(void); 65 extern int acpi_video_get_levels(struct acpi_device *device, 66 struct acpi_video_device_brightness **dev_br, 67 int *pmax_level); 68 #else 69 static inline int acpi_video_register(void) { return -ENODEV; } 70 static inline void acpi_video_unregister(void) { return; } 71 static inline int acpi_video_get_edid(struct acpi_device *device, int type, 72 int device_id, void **edid) 73 { 74 return -ENODEV; 75 } 76 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) 77 { 78 return acpi_backlight_vendor; 79 } 80 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) 81 { 82 } 83 static inline bool acpi_video_handles_brightness_key_presses(void) 84 { 85 return false; 86 } 87 static inline int acpi_video_get_levels(struct acpi_device *device, 88 struct acpi_video_device_brightness **dev_br, 89 int *pmax_level) 90 { 91 return -ENODEV; 92 } 93 #endif 94 95 #endif 96