video.h 2.8 KB
Newer Older
1
/* SPDX-License-Identifier: GPL-2.0 */
2 3 4
#ifndef __ACPI_VIDEO_H
#define __ACPI_VIDEO_H

5
#include <linux/errno.h> /* for ENODEV */
6
#include <linux/types.h> /* for bool */
7

8 9 10 11 12 13 14 15 16 17 18 19 20
struct acpi_video_brightness_flags {
	u8 _BCL_no_ac_battery_levels:1;	/* no AC/Battery levels in _BCL */
	u8 _BCL_reversed:1;		/* _BCL package is in a reversed order */
	u8 _BQC_use_index:1;		/* _BQC returns an index value */
};

struct acpi_video_device_brightness {
	int curr;
	int count;
	int *levels;
	struct acpi_video_brightness_flags flags;
};

21 22
struct acpi_device;

23 24
#define ACPI_VIDEO_CLASS	"video"

25 26 27 28 29 30 31 32 33
#define ACPI_VIDEO_DISPLAY_CRT  1
#define ACPI_VIDEO_DISPLAY_TV   2
#define ACPI_VIDEO_DISPLAY_DVI  3
#define ACPI_VIDEO_DISPLAY_LCD  4

#define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
#define ACPI_VIDEO_DISPLAY_LEGACY_PANEL   0x0110
#define ACPI_VIDEO_DISPLAY_LEGACY_TV      0x0200

34 35 36 37 38 39 40 41 42 43 44
#define ACPI_VIDEO_NOTIFY_SWITCH		0x80
#define ACPI_VIDEO_NOTIFY_PROBE			0x81
#define ACPI_VIDEO_NOTIFY_CYCLE			0x82
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT		0x83
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT		0x84
#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS	0x85
#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS	0x86
#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS	0x87
#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS	0x88
#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF		0x89

45 46 47 48 49 50 51 52
enum acpi_backlight_type {
	acpi_backlight_undef = -1,
	acpi_backlight_none = 0,
	acpi_backlight_video,
	acpi_backlight_vendor,
	acpi_backlight_native,
};

53
#if IS_ENABLED(CONFIG_ACPI_VIDEO)
54
extern int acpi_video_register(void);
55
extern void acpi_video_unregister(void);
56 57
extern int acpi_video_get_edid(struct acpi_device *device, int type,
			       int device_id, void **edid);
58 59
extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
extern void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type);
60 61 62 63
/*
 * Note: The value returned by acpi_video_handles_brightness_key_presses()
 * may change over time and should not be cached.
 */
64
extern bool acpi_video_handles_brightness_key_presses(void);
65
extern int acpi_video_get_levels(struct acpi_device *device,
66 67
				 struct acpi_video_device_brightness **dev_br,
				 int *pmax_level);
68
#else
69
static inline int acpi_video_register(void) { return -ENODEV; }
70
static inline void acpi_video_unregister(void) { return; }
71 72 73 74 75
static inline int acpi_video_get_edid(struct acpi_device *device, int type,
				      int device_id, void **edid)
{
	return -ENODEV;
}
76 77 78 79
static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
	return acpi_backlight_vendor;
}
80
static inline void acpi_video_set_dmi_backlight_type(enum acpi_backlight_type type)
81 82
{
}
83 84 85 86
static inline bool acpi_video_handles_brightness_key_presses(void)
{
	return false;
}
87
static inline int acpi_video_get_levels(struct acpi_device *device,
88 89
			struct acpi_video_device_brightness **dev_br,
			int *pmax_level)
90 91 92
{
	return -ENODEV;
}
93 94 95
#endif

#endif