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