@@ -543,6 +543,12 @@ static int __video_register_device(struct video_device *vdev, int type, int nr,
vdev->parent = vdev->v4l2_dev->dev;
if (vdev->ctrl_handler == NULL)
vdev->ctrl_handler = vdev->v4l2_dev->ctrl_handler;
+ /* If the prio state pointer is NULL, and if the driver doesn't
+ handle priorities itself, then use the v4l2_device prio
+ state. */
+ if (vdev->prio == NULL && vdev->ioctl_ops &&
+ vdev->ioctl_ops->vidioc_s_priority == NULL)
+ vdev->prio = &vdev->v4l2_dev->prio;
}
/* Part 2: find a free minor, device node number and device index. */
@@ -36,6 +36,7 @@ int v4l2_device_register(struct device *dev, struct v4l2_device *v4l2_dev)
INIT_LIST_HEAD(&v4l2_dev->subdevs);
spin_lock_init(&v4l2_dev->lock);
mutex_init(&v4l2_dev->ioctl_lock);
+ v4l2_prio_init(&v4l2_dev->prio);
v4l2_dev->dev = dev;
if (dev == NULL) {
/* If dev == NULL, then name must be filled in by the caller */
@@ -83,6 +83,9 @@ struct video_device
/* Control handler associated with this device node. May be NULL. */
struct v4l2_ctrl_handler *ctrl_handler;
+ /* Priority state. If NULL, then v4l2_dev->prio will be used. */
+ struct v4l2_prio_state *prio;
+
/* device info */
char name[32];
int vfl_type;
@@ -22,6 +22,7 @@
#define _V4L2_DEVICE_H
#include <media/v4l2-subdev.h>
+#include <media/v4l2-dev.h>
/* Each instance of a V4L2 device should create the v4l2_device struct,
either stand-alone or embedded in a larger struct.
@@ -51,6 +52,8 @@ struct v4l2_device {
unsigned int notification, void *arg);
/* The control handler. May be NULL. */
struct v4l2_ctrl_handler *ctrl_handler;
+ /* Device's priority state */
+ struct v4l2_prio_state prio;
/* BKL replacement mutex. Temporary solution only. */
struct mutex ioctl_lock;
};