1 #ifndef __ACPI_VIDEO_H 2 #define __ACPI_VIDEO_H 3 4 #include <linux/errno.h> /* for ENODEV */ 5 6 struct acpi_device; 7 8 #define ACPI_VIDEO_CLASS "video" 9 10 #define ACPI_VIDEO_DISPLAY_CRT 1 11 #define ACPI_VIDEO_DISPLAY_TV 2 12 #define ACPI_VIDEO_DISPLAY_DVI 3 13 #define ACPI_VIDEO_DISPLAY_LCD 4 14 15 #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100 16 #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110 17 #define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200 18 19 enum acpi_backlight_type { 20 acpi_backlight_undef = -1, 21 acpi_backlight_none = 0, 22 acpi_backlight_video, 23 acpi_backlight_vendor, 24 acpi_backlight_native, 25 }; 26 27 #if IS_ENABLED(CONFIG_ACPI_VIDEO) 28 extern int acpi_video_register(void); 29 extern void acpi_video_unregister(void); 30 extern int acpi_video_get_edid(struct acpi_device *device, int type, 31 int device_id, void **edid); 32 extern enum acpi_backlight_type acpi_video_get_backlight_type(void); 33 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type); 34 #else 35 static inline int acpi_video_register(void) { return 0; } 36 static inline void acpi_video_unregister(void) { return; } 37 static inline int acpi_video_get_edid(struct acpi_device *device, int type, 38 int device_id, void **edid) 39 { 40 return -ENODEV; 41 } 42 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void) 43 { 44 return acpi_backlight_vendor; 45 } 46 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type) 47 { 48 } 49 #endif 50 51 #endif 52