1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (c) 2020, NVIDIA CORPORATION. All rights reserved. 4 */ 5 6 #ifndef __PLATFORM_DATA_X86_NVIDIA_WMI_EC_BACKLIGHT_H 7 #define __PLATFORM_DATA_X86_NVIDIA_WMI_EC_BACKLIGHT_H 8 9 #define WMI_BRIGHTNESS_GUID "603E9613-EF25-4338-A3D0-C46177516DB7" 10 11 /** 12 * enum wmi_brightness_method - WMI method IDs 13 * @WMI_BRIGHTNESS_METHOD_LEVEL: Get/Set EC brightness level status 14 * @WMI_BRIGHTNESS_METHOD_SOURCE: Get/Set EC Brightness Source 15 */ 16 enum wmi_brightness_method { 17 WMI_BRIGHTNESS_METHOD_LEVEL = 1, 18 WMI_BRIGHTNESS_METHOD_SOURCE = 2, 19 WMI_BRIGHTNESS_METHOD_MAX 20 }; 21 22 /** 23 * enum wmi_brightness_mode - Operation mode for WMI-wrapped method 24 * @WMI_BRIGHTNESS_MODE_GET: Get the current brightness level/source. 25 * @WMI_BRIGHTNESS_MODE_SET: Set the brightness level. 26 * @WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL: Get the maximum brightness level. This 27 * is only valid when the WMI method is 28 * %WMI_BRIGHTNESS_METHOD_LEVEL. 29 */ 30 enum wmi_brightness_mode { 31 WMI_BRIGHTNESS_MODE_GET = 0, 32 WMI_BRIGHTNESS_MODE_SET = 1, 33 WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL = 2, 34 WMI_BRIGHTNESS_MODE_MAX 35 }; 36 37 /** 38 * enum wmi_brightness_source - Backlight brightness control source selection 39 * @WMI_BRIGHTNESS_SOURCE_GPU: Backlight brightness is controlled by the GPU. 40 * @WMI_BRIGHTNESS_SOURCE_EC: Backlight brightness is controlled by the 41 * system's Embedded Controller (EC). 42 * @WMI_BRIGHTNESS_SOURCE_AUX: Backlight brightness is controlled over the 43 * DisplayPort AUX channel. 44 */ 45 enum wmi_brightness_source { 46 WMI_BRIGHTNESS_SOURCE_GPU = 1, 47 WMI_BRIGHTNESS_SOURCE_EC = 2, 48 WMI_BRIGHTNESS_SOURCE_AUX = 3, 49 WMI_BRIGHTNESS_SOURCE_MAX 50 }; 51 52 /** 53 * struct wmi_brightness_args - arguments for the WMI-wrapped ACPI method 54 * @mode: Pass in an &enum wmi_brightness_mode value to select between 55 * getting or setting a value. 56 * @val: In parameter for value to set when using %WMI_BRIGHTNESS_MODE_SET 57 * mode. Not used in conjunction with %WMI_BRIGHTNESS_MODE_GET or 58 * %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL mode. 59 * @ret: Out parameter returning retrieved value when operating in 60 * %WMI_BRIGHTNESS_MODE_GET or %WMI_BRIGHTNESS_MODE_GET_MAX_LEVEL 61 * mode. Not used in %WMI_BRIGHTNESS_MODE_SET mode. 62 * @ignored: Padding; not used. The ACPI method expects a 24 byte params struct. 63 * 64 * This is the parameters structure for the WmiBrightnessNotify ACPI method as 65 * wrapped by WMI. The value passed in to @val or returned by @ret will be a 66 * brightness value when the WMI method ID is %WMI_BRIGHTNESS_METHOD_LEVEL, or 67 * an &enum wmi_brightness_source value with %WMI_BRIGHTNESS_METHOD_SOURCE. 68 */ 69 struct wmi_brightness_args { 70 u32 mode; 71 u32 val; 72 u32 ret; 73 u32 ignored[3]; 74 }; 75 76 #endif 77