1 // SPDX-License-Identifier: GPL-2.0
5  * Copyright (c) 2017-2018 Ronald Tschalär
6  * Copyright (c) 2022-2023 Kerem Karabay <kekrby@gmail.com>
15 #include "hid-ids.h"
28 module_param_named(brightness, appletb_bl_def_brightness, int, 0444);
29 MODULE_PARM_DESC(brightness, "Default brightness:\n"
30 			 "    0 - Touchbar is off\n"
31 			 "    1 - Dim brightness\n"
32 			 "    [2] - Full brightness");
47 static int appletb_bl_set_brightness(struct appletb_bl *bl, u8 brightness)  in appletb_bl_set_brightness()  argument
49 	struct hid_report *report = bl->brightness_field->report;  in appletb_bl_set_brightness()
50 	struct hid_device *hdev = report->device;  in appletb_bl_set_brightness()
53 	ret = hid_set_field(bl->aux1_field, 0, 1);  in appletb_bl_set_brightness()
59 	ret = hid_set_field(bl->brightness_field, 0, brightness);  in appletb_bl_set_brightness()
61 		hid_err(hdev, "Failed to set brightness field (%pe)\n", ERR_PTR(ret));  in appletb_bl_set_brightness()
65 	if (!bl->full_on) {  in appletb_bl_set_brightness()
72 		bl->full_on = true;  in appletb_bl_set_brightness()
77 	if (brightness == APPLETB_BL_OFF) {  in appletb_bl_set_brightness()
79 		bl->full_on = false;  in appletb_bl_set_brightness()
88 	u8 brightness;  in appletb_bl_update_status()  local
91 		brightness = APPLETB_BL_OFF;  in appletb_bl_update_status()
93 		brightness = appletb_bl_brightness_map[backlight_get_brightness(bdev)];  in appletb_bl_update_status()
95 	return appletb_bl_set_brightness(bl, brightness);  in appletb_bl_update_status()
107 	struct device *dev = &hdev->dev;  in appletb_bl_probe()
122 		return -ENODEV;  in appletb_bl_probe()
124 	if (aux1_field->report != brightness_field->report)  in appletb_bl_probe()
125 		return dev_err_probe(dev, -ENODEV, "Encountered unexpected report structure\n");  in appletb_bl_probe()
129 		return -ENOMEM;  in appletb_bl_probe()
141 	bl->aux1_field = aux1_field;  in appletb_bl_probe()
142 	bl->brightness_field = brightness_field;  in appletb_bl_probe()
148 		dev_err_probe(dev, ret, "Failed to set default touch bar brightness to %d\n",  in appletb_bl_probe()
154 	bl_props.max_brightness = ARRAY_SIZE(appletb_bl_brightness_map) - 1;  in appletb_bl_probe()
156 	bl->bdev = devm_backlight_device_register(dev, "appletb_backlight", dev, bl,  in appletb_bl_probe()
158 	if (IS_ERR(bl->bdev)) {  in appletb_bl_probe()
159 		ret = PTR_ERR(bl->bdev);  in appletb_bl_probe()
187 	/* MacBook Pro's 2018, 2019, with T2 chip: iBridge DFR Brightness */
194 	.name = "hid-appletb-bl",