1 // SPDX-License-Identifier: GPL-2.0-only
4  * drm_sysfs.c - Modifications to drm_sysfs_class.c to support
9  * Copyright (c) 2003-2004 Greg Kroah-Hartman <greg@kroah.com>
10  * Copyright (c) 2003-2004 IBM Corp.
32 #define to_drm_minor(d) dev_get_drvdata(d)  argument
33 #define to_drm_connector(d) dev_get_drvdata(d)  argument
44  * drm_connector_register() in case of hot-plugged connectors. Unregistration is
53 struct class *drm_class;
63  * drm_sysfs_init - initialize sysfs helpers
65  * This is used to create the DRM class, which is the implicit parent of any
66  * other top-level DRM sysfs objects.
87 	drm_class->devnode = drm_devnode;  in drm_sysfs_init()
92  * drm_sysfs_destroy - destroys DRM class
94  * Destroy the DRM device class.
113 	struct drm_device *dev = connector->dev;  in status_store()
117 	ret = mutex_lock_interruptible(&dev->mode_config.mutex);  in status_store()
121 	old_force = connector->force;  in status_store()
124 		connector->force = 0;  in status_store()
126 		connector->force = DRM_FORCE_ON;  in status_store()
127 	else if (sysfs_streq(buf, "on-digital"))  in status_store()
128 		connector->force = DRM_FORCE_ON_DIGITAL;  in status_store()
130 		connector->force = DRM_FORCE_OFF;  in status_store()
132 		ret = -EINVAL;  in status_store()
134 	if (old_force != connector->force || !connector->force) {  in status_store()
135 		DRM_DEBUG_KMS("[CONNECTOR:%d:%s] force updated from %d to %d or reprobing\n",  in status_store()
136 			      connector->base.id,  in status_store()
137 			      connector->name,  in status_store()
138 			      old_force, connector->force);  in status_store()
140 		connector->funcs->fill_modes(connector,  in status_store()
141 					     dev->mode_config.max_width,  in status_store()
142 					     dev->mode_config.max_height);  in status_store()
145 	mutex_unlock(&dev->mode_config.mutex);  in status_store()
157 	status = READ_ONCE(connector->status);  in status_show()
170 	dpms = READ_ONCE(connector->dpms);  in dpms_show()
183 	enabled = READ_ONCE(connector->encoder);  in enabled_show()
198 	mutex_lock(&connector->dev->mode_config.mutex);  in edid_show()
199 	if (!connector->edid_blob_ptr)  in edid_show()
202 	edid = connector->edid_blob_ptr->data;  in edid_show()
203 	size = connector->edid_blob_ptr->length;  in edid_show()
211 		count = size - off;  in edid_show()
216 	mutex_unlock(&connector->dev->mode_config.mutex);  in edid_show()
229 	mutex_lock(&connector->dev->mode_config.mutex);  in modes_show()
230 	list_for_each_entry(mode, &connector->modes, head) {  in modes_show()
231 		written += scnprintf(buf + written, PAGE_SIZE - written, "%s\n",  in modes_show()
232 				    mode->name);  in modes_show()
234 	mutex_unlock(&connector->dev->mode_config.mutex);  in modes_show()
276 	struct drm_device *dev = connector->dev;  in drm_sysfs_connector_add()
278 	if (connector->kdev)  in drm_sysfs_connector_add()
281 	connector->kdev =  in drm_sysfs_connector_add()
282 		device_create_with_groups(drm_class, dev->primary->kdev, 0,  in drm_sysfs_connector_add()
284 					  "card%d-%s", dev->primary->index,  in drm_sysfs_connector_add()
285 					  connector->name);  in drm_sysfs_connector_add()
287 		  connector->name);  in drm_sysfs_connector_add()
289 	if (IS_ERR(connector->kdev)) {  in drm_sysfs_connector_add()
290 		DRM_ERROR("failed to register connector device: %ld\n", PTR_ERR(connector->kdev));  in drm_sysfs_connector_add()
291 		return PTR_ERR(connector->kdev);  in drm_sysfs_connector_add()
294 	if (connector->ddc)  in drm_sysfs_connector_add()
295 		return sysfs_create_link(&connector->kdev->kobj,  in drm_sysfs_connector_add()
296 				 &connector->ddc->dev.kobj, "ddc");  in drm_sysfs_connector_add()
302 	if (!connector->kdev)  in drm_sysfs_connector_remove()
305 	if (connector->ddc)  in drm_sysfs_connector_remove()
306 		sysfs_remove_link(&connector->kdev->kobj, "ddc");  in drm_sysfs_connector_remove()
309 		  connector->name);  in drm_sysfs_connector_remove()
311 	device_unregister(connector->kdev);  in drm_sysfs_connector_remove()
312 	connector->kdev = NULL;  in drm_sysfs_connector_remove()
322 	kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);  in drm_sysfs_lease_event()
326  * drm_sysfs_hotplug_event - generate a DRM uevent
343 	kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);  in drm_sysfs_hotplug_event()
348  * drm_sysfs_connector_status_event - generate a DRM uevent for connector
360 	struct drm_device *dev = connector->dev;  in drm_sysfs_connector_status_event()
364 	WARN_ON(!drm_mode_obj_find_prop_id(&connector->base,  in drm_sysfs_connector_status_event()
365 					   property->base.id));  in drm_sysfs_connector_status_event()
368 		 "CONNECTOR=%u", connector->base.id);  in drm_sysfs_connector_status_event()
370 		 "PROPERTY=%u", property->base.id);  in drm_sysfs_connector_status_event()
374 	kobject_uevent_env(&dev->primary->kdev->kobj, KOBJ_CHANGE, envp);  in drm_sysfs_connector_status_event()
389 	if (minor->type == DRM_MINOR_RENDER)  in drm_sysfs_minor_alloc()
390 		minor_str = "renderD%d";  in drm_sysfs_minor_alloc()
392 		minor_str = "card%d";  in drm_sysfs_minor_alloc()
396 		return ERR_PTR(-ENOMEM);  in drm_sysfs_minor_alloc()
399 	kdev->devt = MKDEV(DRM_MAJOR, minor->index);  in drm_sysfs_minor_alloc()
400 	kdev->class = drm_class;  in drm_sysfs_minor_alloc()
401 	kdev->type = &drm_sysfs_device_minor;  in drm_sysfs_minor_alloc()
402 	kdev->parent = minor->dev->dev;  in drm_sysfs_minor_alloc()
403 	kdev->release = drm_sysfs_release;  in drm_sysfs_minor_alloc()
406 	r = dev_set_name(kdev, minor_str, minor->index);  in drm_sysfs_minor_alloc()
418  * drm_class_device_register - register new device with the DRM sysfs class
421  * Registers a new &struct device within the DRM sysfs class. Essentially only
428 		return -ENOENT;  in drm_class_device_register()
430 	dev->class = drm_class;  in drm_class_device_register()
436  * drm_class_device_unregister - unregister device with the DRM sysfs class
439  * Unregisters a &struct device from the DRM sysfs class. Essentially only used