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00a734104a
The current logic for the ACPI backlight detection will create a backlight device if no native or vendor drivers have created 8 seconds after the system has booted if the ACPI tables included backlight control methods. If the GPU drivers have loaded, they may be able to report whether any LCD panels were found. Allow using this information to factor in whether to enable the fallback logic for making an acpi_video0 backlight device. Suggested-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Mario Limonciello <mario.limonciello@amd.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
102 lines
3 KiB
C
102 lines
3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ACPI_VIDEO_H
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#define __ACPI_VIDEO_H
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#include <linux/errno.h> /* for ENODEV */
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#include <linux/types.h> /* for bool */
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struct acpi_video_brightness_flags {
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u8 _BCL_no_ac_battery_levels:1; /* no AC/Battery levels in _BCL */
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u8 _BCL_reversed:1; /* _BCL package is in a reversed order */
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u8 _BQC_use_index:1; /* _BQC returns an index value */
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};
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struct acpi_video_device_brightness {
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int curr;
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int count;
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int *levels;
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struct acpi_video_brightness_flags flags;
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};
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struct acpi_device;
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#define ACPI_VIDEO_CLASS "video"
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#define ACPI_VIDEO_DISPLAY_CRT 1
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#define ACPI_VIDEO_DISPLAY_TV 2
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#define ACPI_VIDEO_DISPLAY_DVI 3
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#define ACPI_VIDEO_DISPLAY_LCD 4
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#define ACPI_VIDEO_DISPLAY_LEGACY_MONITOR 0x0100
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#define ACPI_VIDEO_DISPLAY_LEGACY_PANEL 0x0110
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#define ACPI_VIDEO_DISPLAY_LEGACY_TV 0x0200
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#define ACPI_VIDEO_NOTIFY_SWITCH 0x80
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#define ACPI_VIDEO_NOTIFY_PROBE 0x81
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#define ACPI_VIDEO_NOTIFY_CYCLE 0x82
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#define ACPI_VIDEO_NOTIFY_NEXT_OUTPUT 0x83
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#define ACPI_VIDEO_NOTIFY_PREV_OUTPUT 0x84
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#define ACPI_VIDEO_NOTIFY_CYCLE_BRIGHTNESS 0x85
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#define ACPI_VIDEO_NOTIFY_INC_BRIGHTNESS 0x86
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#define ACPI_VIDEO_NOTIFY_DEC_BRIGHTNESS 0x87
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#define ACPI_VIDEO_NOTIFY_ZERO_BRIGHTNESS 0x88
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#define ACPI_VIDEO_NOTIFY_DISPLAY_OFF 0x89
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enum acpi_backlight_type {
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acpi_backlight_undef = -1,
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acpi_backlight_none = 0,
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acpi_backlight_video,
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acpi_backlight_vendor,
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acpi_backlight_native,
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acpi_backlight_nvidia_wmi_ec,
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acpi_backlight_apple_gmux,
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};
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#if IS_ENABLED(CONFIG_ACPI_VIDEO)
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extern void acpi_video_report_nolcd(void);
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extern int acpi_video_register(void);
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extern void acpi_video_unregister(void);
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extern void acpi_video_register_backlight(void);
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extern int acpi_video_get_edid(struct acpi_device *device, int type,
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int device_id, void **edid);
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extern enum acpi_backlight_type acpi_video_get_backlight_type(void);
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extern bool acpi_video_backlight_use_native(void);
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/*
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* Note: The value returned by acpi_video_handles_brightness_key_presses()
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* may change over time and should not be cached.
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*/
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extern bool acpi_video_handles_brightness_key_presses(void);
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extern int acpi_video_get_levels(struct acpi_device *device,
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struct acpi_video_device_brightness **dev_br,
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int *pmax_level);
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#else
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static inline void acpi_video_report_nolcd(void) { return; };
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static inline int acpi_video_register(void) { return -ENODEV; }
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static inline void acpi_video_unregister(void) { return; }
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static inline void acpi_video_register_backlight(void) { return; }
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static inline int acpi_video_get_edid(struct acpi_device *device, int type,
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int device_id, void **edid)
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{
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return -ENODEV;
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}
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static inline enum acpi_backlight_type acpi_video_get_backlight_type(void)
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{
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return acpi_backlight_vendor;
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}
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static inline bool acpi_video_backlight_use_native(void)
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{
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return true;
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}
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static inline bool acpi_video_handles_brightness_key_presses(void)
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{
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return false;
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}
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static inline int acpi_video_get_levels(struct acpi_device *device,
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struct acpi_video_device_brightness **dev_br,
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int *pmax_level)
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{
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return -ENODEV;
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}
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#endif
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#endif
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