1 // SPDX-License-Identifier: GPL-2.0-only
10 #include <linux/platform_data/x86/nvidia-wmi-ec-backlight.h>
15 static bool force;  variable
16 module_param(force, bool, 0444);
17 MODULE_PARM_DESC(force, "Force loading (disable acpi_backlight=xxx checks");
20  * wmi_brightness_notify() - helper function for calling WMI-wrapped ACPI method
24  * @mode: The operation to perform on the method (e.g. %WMI_BRIGHTNESS_MODE_SET
26  * @val:  Pointer to a value passed in by the caller when @mode is
27  *        %WMI_BRIGHTNESS_MODE_SET, or a value passed out to caller when @mode
32 …otify(struct wmi_device *w, enum wmi_brightness_method id, enum wmi_brightness_mode mode, u32 *val)  in wmi_brightness_notify()  argument
35 		.mode = mode,  in wmi_brightness_notify()
44 	    mode < WMI_BRIGHTNESS_MODE_GET || mode >= WMI_BRIGHTNESS_MODE_MAX)  in wmi_brightness_notify()
45 		return -EINVAL;  in wmi_brightness_notify()
47 	if (mode == WMI_BRIGHTNESS_MODE_SET)  in wmi_brightness_notify()
52 		dev_err(&w->dev, "EC backlight control failed: %s\n",  in wmi_brightness_notify()
54 		return -EIO;  in wmi_brightness_notify()
57 	if (mode != WMI_BRIGHTNESS_MODE_SET)  in wmi_brightness_notify()
69 			             &bd->props.brightness);  in nvidia_wmi_ec_backlight_update_status()
98 	if (!force && acpi_video_get_backlight_type() != acpi_backlight_nvidia_wmi_ec)  in nvidia_wmi_ec_backlight_probe()
99 		return -ENODEV;  in nvidia_wmi_ec_backlight_probe()
103 	 * be prioritized over any exposed GPU-driven raw device(s).  in nvidia_wmi_ec_backlight_probe()
118 	bdev = devm_backlight_device_register(&wdev->dev,  in nvidia_wmi_ec_backlight_probe()
120 					      &wdev->dev, wdev,  in nvidia_wmi_ec_backlight_probe()
134 		.name = "nvidia-wmi-ec-backlight",