include/acpi/video.h

0001 /* SPDX-License-Identifier: GPL-2.0 */
0002 #ifndef __ACPI_VIDEO_H
0003 #define __ACPI_VIDEO_H
0004
0005 #include <linux/errno.h> /* for ENODEV */
0006 #include <linux/types.h> /* for bool */
0007
0008 struct acpi_video_brightness_flags {
0009     u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
0010     u8 _BCL_reversed:1;     /* _BCL package is in a reversed order */
0011     u8 _BQC_use_index:1;        /* _BQC returns an index value */
0012 };
0013
0014 struct acpi_video_device_brightness {
0015     int curr;
0016     int count;
0017     int *levels;
0018     struct acpi_video_brightness_flags flags;
0019 };
0020
0021 struct acpi_device;
0022
0023 #define ACPI_VIDEO_CLASS    "video"
0024
0025 #define ACPI_VIDEO_DISPLAY_CRT  1
0026 #define ACPI_VIDEO_DISPLAY_TV   2
0027 #define ACPI_VIDEO_DISPLAY_DVI  3
0028 #define ACPI_VIDEO_DISPLAY_LCD  4
0029
0030 #define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
0031 #define ACPI_VIDEO_DISPLAY_LEGACY_PANEL   0x0110
0032 #define ACPI_VIDEO_DISPLAY_LEGACY_TV      0x0200
0033
0034 #define ACPI_VIDEO_NOTIFY_SWITCH        0x80
0035 #define ACPI_VIDEO_NOTIFY_PROBE         0x81
0036 #define ACPI_VIDEO_NOTIFY_CYCLE         0x82
0037 #define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT       0x83
0038 #define ACPI_VIDEO_NOTIFY_PREV_OUTPUT       0x84
0039 #define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS  0x85
0040 #define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS    0x86
0041 #define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS    0x87
0042 #define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS   0x88
0043 #define ACPI_VIDEO_NOTIFY_DISPLAY_OFF       0x89
0044
0045 enum acpi_backlight_type {
0046     acpi_backlight_undef = -1,
0047     acpi_backlight_none = 0,
0048     acpi_backlight_video,
0049     acpi_backlight_vendor,
0050     acpi_backlight_native,
0051 };
0052
0053 #if IS_ENABLED(CONFIG_ACPI_VIDEO)
0054 extern int acpi_video_register(void);
0055 extern void acpi_video_unregister(void);
0056 extern int acpi_video_get_edid(struct acpi_device *device, int type,
0057                    int device_id, void **edid);
0058 extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
0059 extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
0060 /*
0061  * Note: The value returned by acpi_video_handles_brightness_key_presses()
0062  * may change over time and should not be cached.
0063  */
0064 extern bool acpi_video_handles_brightness_key_presses(void);
0065 extern int acpi_video_get_levels(struct acpi_device *device,
0066                  struct acpi_video_device_brightness **dev_br,
0067                  int *pmax_level);
0068 #else
0069 static inline int acpi_video_register(void) { return -ENODEV; }
0070 static inline void acpi_video_unregister(void) { return; }
0071 static inline int acpi_video_get_edid(struct acpi_device *device, int type,
0072                       int device_id, void **edid)
0073 {
0074     return -ENODEV;
0075 }
0076 static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
0077 {
0078     return acpi_backlight_vendor;
0079 }
0080 static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
0081 {
0082 }
0083 static inline bool acpi_video_handles_brightness_key_presses(void)
0084 {
0085     return false;
0086 }
0087 static inline int acpi_video_get_levels(struct acpi_device *device,
0088             struct acpi_video_device_brightness **dev_br,
0089             int *pmax_level)
0090 {
0091     return -ENODEV;
0092 }
0093 #endif
0094
0095 #endif