| /* 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 |