media/v4l2-core/v4l2-device.c

17 int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
19 	if (v4l2_dev == NULL)
22 	INIT_LIST_HEAD(&v4l2_dev->subdevs);
23 	spin_lock_init(&v4l2_dev->lock);
24 	v4l2_prio_init(&v4l2_dev->prio);
25 	kref_init(&v4l2_dev->ref);
27 	v4l2_dev->dev = dev;
30 		if (WARN_ON(!v4l2_dev->name[0]))
36 	if (!v4l2_dev->name[0])
37 		snprintf(v4l2_dev->name, sizeof(v4l2_dev->name), "%s %s",
40 		dev_set_drvdata(dev, v4l2_dev);
47 	struct v4l2_device *v4l2_dev =
50 	if (v4l2_dev->release)
51 		v4l2_dev->release(v4l2_dev);
54 int v4l2_device_put(struct v4l2_device *v4l2_dev)
56 	return kref_put(&v4l2_dev->ref, v4l2_device_release);
60 int v4l2_device_set_name(struct v4l2_device *v4l2_dev, const char *basename,
67 		snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
70 		snprintf(v4l2_dev->name, sizeof(v4l2_dev->name),
76 void v4l2_device_disconnect(struct v4l2_device *v4l2_dev)
78 	if (v4l2_dev->dev == NULL)
81 	if (dev_get_drvdata(v4l2_dev->dev) == v4l2_dev)
82 		dev_set_drvdata(v4l2_dev->dev, NULL);
83 	put_device(v4l2_dev->dev);
84 	v4l2_dev->dev = NULL;
88 void v4l2_device_unregister(struct v4l2_device *v4l2_dev)
92 	/* Just return if v4l2_dev is NULL or if it was already
94 	if (v4l2_dev == NULL || !v4l2_dev->name[0])
96 	v4l2_device_disconnect(v4l2_dev);
99 	list_for_each_entry_safe(sd, next, &v4l2_dev->subdevs, list) {
107 	v4l2_dev->name[0] = '\0';
111 int v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
117 	if (!v4l2_dev || !sd || sd->v4l2_dev || !sd->name[0])
127 	sd->owner_v4l2_dev = v4l2_dev->dev && v4l2_dev->dev->driver &&
128 		sd->owner == v4l2_dev->dev->driver->owner;
133 	sd->v4l2_dev = v4l2_dev;
135 	err = v4l2_ctrl_add_handler(v4l2_dev->ctrl_handler, sd->ctrl_handler,
142 	if (v4l2_dev->mdev) {
143 		err = media_device_register_entity(v4l2_dev->mdev, &sd->entity);
155 	spin_lock(&v4l2_dev->lock);
156 	list_add_tail(&sd->list, &v4l2_dev->subdevs);
157 	spin_unlock(&v4l2_dev->lock);
168 	sd->v4l2_dev = NULL;
189 int __v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev,
199 	list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
215 		vdev->v4l2_dev = v4l2_dev;
234 		if (vdev->v4l2_dev->mdev) {
251 	list_for_each_entry(sd, &v4l2_dev->subdevs, list) {
263 	struct v4l2_device *v4l2_dev;
266 	if (sd == NULL || sd->v4l2_dev == NULL)
269 	v4l2_dev = sd->v4l2_dev;
271 	spin_lock(&v4l2_dev->lock);
273 	spin_unlock(&v4l2_dev->lock);
277 	sd->v4l2_dev = NULL;
280 	if (v4l2_dev->mdev) {