4 files changed, 13 insertions, 0 deletions

diff --git a/drivers/media/video/v4l2-dev.c b/drivers/media/video/v4l2-dev.c
index 65d546f35ef4..6b1ef85d8cc8 100644
--- a/drivers/media/video/v4l2-dev.c
+++ b/drivers/media/video/v4l2-dev.c
@@ -573,6 +573,12 @@ 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. */
diff --git a/drivers/media/video/v4l2-device.c b/drivers/media/video/v4l2-device.c
index a1afda352d08..fd7a445ce34c 100644
--- a/drivers/media/video/v4l2-device.c
+++ b/drivers/media/video/v4l2-device.c
@@ -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 */
diff --git a/include/media/v4l2-dev.h b/include/media/v4l2-dev.h
index 9193703f4f0f..3700127ba299 100644
--- a/include/media/v4l2-dev.h
+++ b/include/media/v4l2-dev.h
@@ -89,6 +89,9 @@ 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;
diff --git a/include/media/v4l2-device.h b/include/media/v4l2-device.h
index 0c2bd3075038..3b723283da26 100644
--- a/include/media/v4l2-device.h
+++ b/include/media/v4l2-device.h
@@ -23,6 +23,7 @@
 
 #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.
@@ -55,6 +56,8 @@ 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;
 };