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_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 #define ACPI_VIDEO_NOTIFY_SWITCH                0x80
  34 #define ACPI_VIDEO_NOTIFY_PROBE                 0x81
  35 #define ACPI_VIDEO_NOTIFY_CYCLE                 0x82
  36 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT           0x83
  37 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT           0x84
  38 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS      0x85
  39 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS        0x86
  40 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS        0x87
  41 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS       0x88
  42 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF           0x89
  43
  44 enum acpi_backlight_type {
  45         acpi_backlight_undef = -1,
  46         acpi_backlight_none = 0,
  47         acpi_backlight_video,
  48         acpi_backlight_vendor,
  49         acpi_backlight_native,
  50 };
  51
  52 #if IS_ENABLED(CONFIG_ACPI_VIDEO)
  53 extern int acpi_video_register(void);
  54 extern void acpi_video_unregister(void);
  55 extern int acpi_video_get_edid(struct acpi_device *device, int type,
  56                                int device_id, void **edid);
  57 extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
  58 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
  59 /*
  60  * Note: The value returned by acpi_video_handles_brightness_key_presses()
  61  * may change over time and should not be cached.
  62  */
  63 extern bool acpi_video_handles_brightness_key_presses(void);
  64 extern int acpi_video_get_levels(struct acpi_device *device,
  65                                  struct acpi_video_device_brightness **dev_br,
  66                                  int *pmax_level);
  67 #else
  68 static inline int acpi_video_register(void) { return -ENODEV; }
  69 static inline void acpi_video_unregister(void) { return; }
  70 static inline int acpi_video_get_edid(struct acpi_device *device, int type,
  71                                       int device_id, void **edid)
  72 {
  73         return -ENODEV;
  74 }
  75 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
  76 {
  77         return acpi_backlight_vendor;
  78 }
  79 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
  80 {
  81 }
  82 static inline bool acpi_video_handles_brightness_key_presses(void)
  83 {
  84         return false;
  85 }
  86 static inline int acpi_video_get_levels(struct acpi_device *device,
  87                         struct acpi_video_device_brightness **dev_br,
  88                         int *pmax_level)
  89 {
  90         return -ENODEV;
  91 }
  92 #endif
  93
  94 #endif