linux/include/acpi/video.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ACPI_VIDEO_H
#define __ACPI_VIDEO_H

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

struct acpi_video_brightness_flags {};

struct acpi_video_device_brightness {};

struct acpi_device;

#define ACPI_VIDEO_CLASS

#define ACPI_VIDEO_DISPLAY_CRT
#define ACPI_VIDEO_DISPLAY_TV
#define ACPI_VIDEO_DISPLAY_DVI
#define ACPI_VIDEO_DISPLAY_LCD

#define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR
#define ACPI_VIDEO_DISPLAY_LEGACY_PANEL
#define ACPI_VIDEO_DISPLAY_LEGACY_TV

#define ACPI_VIDEO_NOTIFY_SWITCH
#define ACPI_VIDEO_NOTIFY_PROBE
#define ACPI_VIDEO_NOTIFY_CYCLE
#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT
#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT
#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS
#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS
#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS
#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS
#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF

enum acpi_backlight_type {};

#if IS_ENABLED(CONFIG_ACPI_VIDEO)
extern int acpi_video_register(void);
extern void acpi_video_unregister(void);
extern void acpi_video_register_backlight(void);
extern int acpi_video_get_edid(struct acpi_device *device, int type,
			       int device_id, void **edid);
/*
 * Note: The value returned by acpi_video_handles_brightness_key_presses()
 * may change over time and should not be cached.
 */
extern bool acpi_video_handles_brightness_key_presses(void);
extern int acpi_video_get_levels(struct acpi_device *device,
				 struct acpi_video_device_brightness **dev_br,
				 int *pmax_level);

extern enum acpi_backlight_type __acpi_video_get_backlight_type(bool native,
								bool *auto_detect);

static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
{}

/*
 * This function MUST only be called by GPU drivers to check if the driver
 * should register a backlight class device. This function not only checks
 * if a GPU native backlight device should be registered it *also* tells
 * the ACPI video-detect code that native GPU backlight control is available.
 * Therefor calling this from any place other then the GPU driver is wrong!
 * To check if GPU native backlight control is used in other places instead use:
 *   if (acpi_video_get_backlight_type() == acpi_backlight_native) { ... }
 */
static inline bool acpi_video_backlight_use_native(void)
{}
#else
static inline int acpi_video_register(void) { return -ENODEV; }
static inline void acpi_video_unregister(void) { return; }
static inline void acpi_video_register_backlight(void) { return; }
static inline int acpi_video_get_edid(struct acpi_device *device, int type,
				      int device_id, void **edid)
{
	return -ENODEV;
}
static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
{
	return acpi_backlight_vendor;
}
static inline bool acpi_video_backlight_use_native(void)
{
	return true;
}
static inline bool acpi_video_handles_brightness_key_presses(void)
{
	return false;
}
static inline int acpi_video_get_levels(struct acpi_device *device,
			struct acpi_video_device_brightness **dev_br,
			int *pmax_level)
{
	return -ENODEV;
}
#endif

#endif