LXR linux/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
   7struct 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
  13struct acpi_video_device_brightness {
  14        int curr;
  15        int count;
  16        int *levels;
  17        struct acpi_video_brightness_flags flags;
  18};
  19
  20struct 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
  44enum 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)
  53extern int acpi_video_register(void);
  54extern void acpi_video_unregister(void);
  55extern int acpi_video_get_edid(struct acpi_device *device, int type,
  56                               int device_id, void **edid);
  57extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
  58extern 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 */
  63extern bool acpi_video_handles_brightness_key_presses(void);
  64extern int acpi_video_get_levels(struct acpi_device *device,
  65                                 struct acpi_video_device_brightness **dev_br,
  66                                 int *pmax_level);
  67#else
  68static inline int acpi_video_register(void) { return -ENODEV; }
  69static inline void acpi_video_unregister(void) { return; }
  70static inline int acpi_video_get_edid(struct acpi_device *device, int type,
  71                                      int device_id, void **edid)
  72{
  73        return -ENODEV;
  74}
  75static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
  76{
  77        return acpi_backlight_vendor;
  78}
  79static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
  80{
  81}
  82static inline bool acpi_video_handles_brightness_key_presses(void)
  83{
  84        return false;
  85}
  86static 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
  95