77 lines
2.8 KiB
C
77 lines
2.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved.
|
|
*/
|
|
|
|
#ifndef __PLATFORM_DATA_X86_NVIDIA_WMI_EC_BACKLIGHT_H
|
|
#define __PLATFORM_DATA_X86_NVIDIA_WMI_EC_BACKLIGHT_H
|
|
|
|
#define WMI_BRIGHTNESS_GUID "603E9613-EF25-4338-A3D0-C46177516DB7"
|
|
|
|
/**
|
|
* enum wmi_brightness_method - WMI method IDs
|
|
* @WMI_BRIGHTNESS_METHOD_LEVEL: Get/Set EC brightness level status
|
|
* @WMI_BRIGHTNESS_METHOD_SOURCE: Get/Set EC Brightness Source
|
|
*/
|
|
enum wmi_brightness_method {
|
|
WMI_BRIGHTNESS_METHOD_LEVEL = 1,
|
|
WMI_BRIGHTNESS_METHOD_SOURCE = 2,
|
|
WMI_BRIGHTNESS_METHOD_MAX
|
|
};
|
|
|
|
/**
|
|
* enum wmi_brightness_mode - Operation mode for WMI-wrapped method
|
|
* @WMI_BRIGHTNESS_MODE_GET: Get the current brightness level/source.
|
|
* @WMI_BRIGHTNESS_MODE_SET: Set the brightness level.
|
|
* @WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL: Get the maximum brightness level. This
|
|
* is only valid when the WMI method is
|
|
* %WMI_BRIGHTNESS_METHOD_LEVEL.
|
|
*/
|
|
enum wmi_brightness_mode {
|
|
WMI_BRIGHTNESS_MODE_GET = 0,
|
|
WMI_BRIGHTNESS_MODE_SET = 1,
|
|
WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL = 2,
|
|
WMI_BRIGHTNESS_MODE_MAX
|
|
};
|
|
|
|
/**
|
|
* enum wmi_brightness_source - Backlight brightness control source selection
|
|
* @WMI_BRIGHTNESS_SOURCE_GPU: Backlight brightness is controlled by the GPU.
|
|
* @WMI_BRIGHTNESS_SOURCE_EC: Backlight brightness is controlled by the
|
|
* system's Embedded Controller (EC).
|
|
* @WMI_BRIGHTNESS_SOURCE_AUX: Backlight brightness is controlled over the
|
|
* DisplayPort AUX channel.
|
|
*/
|
|
enum wmi_brightness_source {
|
|
WMI_BRIGHTNESS_SOURCE_GPU = 1,
|
|
WMI_BRIGHTNESS_SOURCE_EC = 2,
|
|
WMI_BRIGHTNESS_SOURCE_AUX = 3,
|
|
WMI_BRIGHTNESS_SOURCE_MAX
|
|
};
|
|
|
|
/**
|
|
* struct wmi_brightness_args - arguments for the WMI-wrapped ACPI method
|
|
* @mode: Pass in an &enum wmi_brightness_mode value to select between
|
|
* getting or setting a value.
|
|
* @val: In parameter for value to set when using %WMI_BRIGHTNESS_MODE_SET
|
|
* mode. Not used in conjunction with %WMI_BRIGHTNESS_MODE_GET or
|
|
* %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL mode.
|
|
* @ret: Out parameter returning retrieved value when operating in
|
|
* %WMI_BRIGHTNESS_MODE_GET or %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL
|
|
* mode. Not used in %WMI_BRIGHTNESS_MODE_SET mode.
|
|
* @ignored: Padding; not used. The ACPI method expects a 24 byte params struct.
|
|
*
|
|
* This is the parameters structure for the WmiBrightnessNotify ACPI method as
|
|
* wrapped by WMI. The value passed in to @val or returned by @ret will be a
|
|
* brightness value when the WMI method ID is %WMI_BRIGHTNESS_METHOD_LEVEL, or
|
|
* an &enum wmi_brightness_source value with %WMI_BRIGHTNESS_METHOD_SOURCE.
|
|
*/
|
|
struct wmi_brightness_args {
|
|
u32 mode;
|
|
u32 val;
|
|
u32 ret;
|
|
u32 ignored[3];
|
|
};
|
|
|
|
#endif
|