/* 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 {	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;}; struct acpi_device; #define ACPI_VIDEO_CLASS	"video" #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 #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 enum acpi_backlight_type {	acpi_backlight_undef = -1,	acpi_backlight_none = 0,	acpi_backlight_video,	acpi_backlight_vendor,	acpi_backlight_native,	acpi_backlight_nvidia_wmi_ec,	acpi_backlight_apple_gmux,	acpi_backlight_dell_uart,}; #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){	return __acpi_video_get_backlight_type(false, NULL);} /* * 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){	return __acpi_video_get_backlight_type(true, NULL) == acpi_backlight_native;}#elsestatic 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