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-rw-r--r--include/acpi/video.h113
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