name : nvidia-wmi-ec-backlight.h /* 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