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[media] v4l2: add v4l2_prio_state to v4l2_device and video_device 

Integrate the v4l2_prio_state into the core, ready for use.

One struct v4l2_prio_state is added to v4l2_device and a pointer
to a prio state is added to video_device.

Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Hans Verkuil 2011-02-24 10:42:24 -03:00 committed by Mauro Carvalho Chehab
parent 0226549308
commit 0f62fd6a2f
4 changed files with 13 additions and 0 deletions
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6
drivers/media/video/v4l2-dev.c
View File

@ -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. */

1
drivers/media/video/v4l2-device.c
View File

@ -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 */

3
include/media/v4l2-dev.h
View File

@ -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;

3
include/media/v4l2-device.h
View File

@ -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;
};