1 files changed, 24 insertions, 0 deletions

diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index b16f307d471..bd102cf509a 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -21,7 +21,9 @@
 #ifndef _V4L2_DEVICE_H
 #define _V4L2_DEVICE_H
 
+#include <media/media-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.
@@ -39,6 +41,9 @@ struct v4l2_device {
            Note: dev might be NULL if there is no parent device
            as is the case with e.g. ISA devices. */
         struct device *dev;
+#if defined(CONFIG_MEDIA_CONTROLLER)
+        struct media_device *mdev;
+#endif
         /* used to keep track of the registered subdevs */
         struct list_head subdevs;
         /* lock this struct; can be used by the driver as well if this
@@ -51,10 +56,23 @@ 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;
+        /* Keep track of the references to this struct. */
+        struct kref ref;
+        /* Release function that is called when the ref count goes to 0. */
+        void (*release)(struct v4l2_device *v4l2_dev);
 };
 
+static inline void v4l2_device_get(struct v4l2_device *v4l2_dev)
+{
+        kref_get(&v4l2_dev->ref);
+}
+
+int v4l2_device_put(struct v4l2_device *v4l2_dev);
+
 /* Initialize v4l2_dev and make dev->driver_data point to v4l2_dev.
    dev may be NULL in rare cases (ISA devices). In that case you
    must fill in the v4l2_dev->name field before calling this function. */
@@ -96,6 +114,12 @@ int __must_check v4l2_device_register_subdev(struct v4l2_device *v4l2_dev,
    wasn't registered. In that case it will do nothing. */
 void v4l2_device_unregister_subdev(struct v4l2_subdev *sd);
 
+/* Register device nodes for all subdev of the v4l2 device that are marked with
+ * the V4L2_SUBDEV_FL_HAS_DEVNODE flag.
+ */
+int __must_check
+v4l2_device_register_subdev_nodes(struct v4l2_device *v4l2_dev);
+
 /* Iterate over all subdevs. */
 #define v4l2_device_for_each_subdev(sd, v4l2_dev)                       \
         list_for_each_entry(sd, &(v4l2_dev)->subdevs, list)