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 void acpi_video_report_nolcd(void); 57 extern int acpi_video_register(void); 58 extern void acpi_video_unregister(void); 59 extern void acpi_video_register_backlight(void); 60 extern int acpi_video_get_edid(struct acpi_device *device, int type, 61 int device_id, void **edid); 62 extern enum acpi_backlight_type acpi_video_get_backlight_type(void); 63 extern bool acpi_video_backlight_use_native(void); 64 /* 65 * Note: The value returned by acpi_video_handles_brightness_key_presses() 66 * may change over time and should not be cached. 67 */ 68 extern bool acpi_video_handles_brightness_key_presses(void); 69 extern int acpi_video_get_levels(struct acpi_device *device, 70 struct acpi_video_device_brightness **dev_br, 71 int *pmax_level); 72 #else 73 static inline void acpi_video_report_nolcd(void) { return; }; 74 static inline int acpi_video_register(void) { return -ENODEV; } 75 static inline void acpi_video_unregister(void) { return; } 76 static inline void acpi_video_register_backlight(void) { return; } 77 static inline int acpi_video_get_edid(struct acpi_device *device, int type, 78 int device_id, void **edid) 79 { 80 return -ENODEV; 81 } 82 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) 83 { 84 return acpi_backlight_vendor; 85 } 86 static inline bool acpi_video_backlight_use_native(void) 87 { 88 return true; 89 } 90 static inline bool acpi_video_handles_brightness_key_presses(void) 91 { 92 return false; 93 } 94 static inline int acpi_video_get_levels(struct acpi_device *device, 95 struct acpi_video_device_brightness **dev_br, 96 int *pmax_level) 97 { 98 return -ENODEV; 99 } 100 #endif 101 102 #endif 103