LXR linux/include/acpi/video.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef __ACPI_VIDEO_H
   3#define __ACPI_VIDEO_H
   4
   5#include <linux/errno.h> /* for ENODEV */
   6#include <linux/types.h> /* for bool */
   7
   8struct acpi_video_brightness_flags {
   9        u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
  10        u8 _BCL_reversed:1;             /* _BCL package is in a reversed order */
  11        u8 _BQC_use_index:1;            /* _BQC returns an index value */
  12};
  13
  14struct acpi_video_device_brightness {
  15        int curr;
  16        int count;
  17        int *levels;
  18        struct acpi_video_brightness_flags flags;
  19};
  20
  21struct acpi_device;
  22
  23#define ACPI_VIDEO_CLASS        "video"
  24
  25#define ACPI_VIDEO_DISPLAY_CRT  1
  26#define ACPI_VIDEO_DISPLAY_TV   2
  27#define ACPI_VIDEO_DISPLAY_DVI  3
  28#define ACPI_VIDEO_DISPLAY_LCD  4
  29
  30#define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
  31#define ACPI_VIDEO_DISPLAY_LEGACY_PANEL   0x0110
  32#define ACPI_VIDEO_DISPLAY_LEGACY_TV      0x0200
  33
  34#define ACPI_VIDEO_NOTIFY_SWITCH                0x80
  35#define ACPI_VIDEO_NOTIFY_PROBE                 0x81
  36#define ACPI_VIDEO_NOTIFY_CYCLE                 0x82
  37#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT           0x83
  38#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT           0x84
  39#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS      0x85
  40#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS        0x86
  41#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS        0x87
  42#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS       0x88
  43#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF           0x89
  44
  45enum acpi_backlight_type {
  46        acpi_backlight_undef = -1,
  47        acpi_backlight_none = 0,
  48        acpi_backlight_video,
  49        acpi_backlight_vendor,
  50        acpi_backlight_native,
  51};
  52
  53#if IS_ENABLED(CONFIG_ACPI_VIDEO)
  54extern int acpi_video_register(void);
  55extern void acpi_video_unregister(void);
  56extern int acpi_video_get_edid(struct acpi_device *device, int type,
  57                               int device_id, void **edid);
  58extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
  59extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
  60/*
  61 * Note: The value returned by acpi_video_handles_brightness_key_presses()
  62 * may change over time and should not be cached.
  63 */
  64extern bool acpi_video_handles_brightness_key_presses(void);
  65extern int acpi_video_get_levels(struct acpi_device *device,
  66                                 struct acpi_video_device_brightness **dev_br,
  67                                 int *pmax_level);
  68#else
  69static inline int acpi_video_register(void) { return -ENODEV; }
  70static inline void acpi_video_unregister(void) { return; }
  71static inline int acpi_video_get_edid(struct acpi_device *device, int type,
  72                                      int device_id, void **edid)
  73{
  74        return -ENODEV;
  75}
  76static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
  77{
  78        return acpi_backlight_vendor;
  79}
  80static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
  81{
  82}
  83static inline bool acpi_video_handles_brightness_key_presses(void)
  84{
  85        return false;
  86}
  87static inline int acpi_video_get_levels(struct acpi_device *device,
  88                        struct acpi_video_device_brightness **dev_br,
  89                        int *pmax_level)
  90{
  91        return -ENODEV;
  92}
  93#endif
  94
  95#endif
  96