1 #ifndef __ACPI_VIDEO_H 2 #define __ACPI_VIDEO_H 3 4 #include <linux/errno.h> /* for ENODEV */ 5 #include <linux/types.h> /* for bool */ 6 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 */ 11 }; 12 13 struct acpi_video_device_brightness { 14 int curr; 15 int count; 16 int *levels; 17 struct acpi_video_brightness_flags flags; 18 }; 19 20 struct acpi_device; 21 22 #define ACPI_VIDEO_CLASS "video" 23 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 28 29 #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100 30 #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110 31 #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200 32 33 enum acpi_backlight_type { 34 acpi_backlight_undef = -1, 35 acpi_backlight_none = 0, 36 acpi_backlight_video, 37 acpi_backlight_vendor, 38 acpi_backlight_native, 39 }; 40 41 #if IS_ENABLED(CONFIG_ACPI_VIDEO) 42 extern int acpi_video_register(void); 43 extern void acpi_video_unregister(void); 44 extern int acpi_video_get_edid(struct acpi_device *device, int type, 45 int device_id, void **edid); 46 extern enum acpi_backlight_type acpi_video_get_backlight_type(void); 47 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); 48 /* 49 * Note: The value returned by acpi_video_handles_brightness_key_presses() 50 * may change over time and should not be cached. 51 */ 52 extern bool acpi_video_handles_brightness_key_presses(void); 53 extern int acpi_video_get_levels(struct acpi_device *device, 54 struct acpi_video_device_brightness **dev_br, 55 int *pmax_level); 56 #else 57 static inline int acpi_video_register(void) { return -ENODEV; } 58 static inline void acpi_video_unregister(void) { return; } 59 static inline int acpi_video_get_edid(struct acpi_device *device, int type, 60 int device_id, void **edid) 61 { 62 return -ENODEV; 63 } 64 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) 65 { 66 return acpi_backlight_vendor; 67 } 68 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) 69 { 70 } 71 static inline bool acpi_video_handles_brightness_key_presses(void) 72 { 73 return false; 74 } 75 static inline int acpi_video_get_levels(struct acpi_device *device, 76 struct acpi_video_device_brightness **dev_br, 77 int *pmax_level) 78 { 79 return -ENODEV; 80 } 81 #endif 82 83 #endif 84