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Diffstat (limited to '')
-rw-r--r-- | include/acpi/video.h | 113 |
1 files changed, 113 insertions, 0 deletions
diff --git a/include/acpi/video.h b/include/acpi/video.h new file mode 100644 index 000000000..ff5a8da5d --- /dev/null +++ b/include/acpi/video.h @@ -0,0 +1,113 @@ +/* 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, +}; + +#if IS_ENABLED(CONFIG_ACPI_VIDEO) +extern void acpi_video_report_nolcd(void); +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); +} + +static inline bool acpi_video_backlight_use_native(void) +{ + return __acpi_video_get_backlight_type(true, NULL) == acpi_backlight_native; +} +#else +static inline void acpi_video_report_nolcd(void) { return; }; +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 |