include/acpi/video.h

   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_device;
   8
   9 #define ACPI_VIDEO_CLASS        "video"
  10
  11 #define ACPI_VIDEO_DISPLAY_CRT  1
  12 #define ACPI_VIDEO_DISPLAY_TV   2
  13 #define ACPI_VIDEO_DISPLAY_DVI  3
  14 #define ACPI_VIDEO_DISPLAY_LCD  4
  15
  16 #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
  17 #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL   0x0110
  18 #define ACPI_VIDEO_DISPLAY_LEGACY_TV      0x0200
  19
  20 enum acpi_backlight_type {
  21         acpi_backlight_undef = -1,
  22         acpi_backlight_none = 0,
  23         acpi_backlight_video,
  24         acpi_backlight_vendor,
  25         acpi_backlight_native,
  26 };
  27
  28 #if IS_ENABLED(CONFIG_ACPI_VIDEO)
  29 extern int acpi_video_register(void);
  30 extern void acpi_video_unregister(void);
  31 extern int acpi_video_get_edid(struct acpi_device *device, int type,
  32                                int device_id, void **edid);
  33 extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
  34 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
  35 /*
  36  * Note: The value returned by acpi_video_handles_brightness_key_presses()
  37  * may change over time and should not be cached.
  38  */
  39 extern bool acpi_video_handles_brightness_key_presses(void);
  40 #else
  41 static inline int acpi_video_register(void) { return 0; }
  42 static inline void acpi_video_unregister(void) { return; }
  43 static inline int acpi_video_get_edid(struct acpi_device *device, int type,
  44                                       int device_id, void **edid)
  45 {
  46         return -ENODEV;
  47 }
  48 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
  49 {
  50         return acpi_backlight_vendor;
  51 }
  52 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
  53 {
  54 }
  55 static inline bool acpi_video_handles_brightness_key_presses(void)
  56 {
  57         return false;
  58 }
  59 #endif
  60
  61 #endif