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[media] media: add support to link interfaces and entities

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Now that we have a new graph object called "interfaces", we
need to be able to link them to the entities.

Add a linked list to the interfaces to allow them to be
linked to the entities.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab
2015-08-07 10:36:25 -03:00
parent 3c0e266fba
commit 86e2662071
2 changed files with 47 additions and 0 deletions
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38
drivers/media/media-entity.c
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@@ -857,6 +857,7 @@ struct media_intf_devnode *media_devnode_create(struct media_device *mdev,
intf->type = type;
intf->flags = flags;
INIT_LIST_HEAD(&intf->links);
devnode->major = major;
devnode->minor = minor;
@@ -874,3 +875,40 @@ void media_devnode_remove(struct media_intf_devnode *devnode)
kfree(devnode);
}
EXPORT_SYMBOL_GPL(media_devnode_remove);
struct media_link *media_create_intf_link(struct media_entity *entity,
struct media_interface *intf,
u32 flags)
{
struct media_link *link;
link = media_add_link(&intf->links);
if (link == NULL)
return NULL;
link->intf = intf;
link->entity = entity;
link->flags = flags;
/* Initialize graph object embedded at the new link */
media_gobj_init(intf->graph_obj.mdev, MEDIA_GRAPH_LINK,
&link->graph_obj);
return link;
}
EXPORT_SYMBOL_GPL(media_create_intf_link);
static void __media_remove_intf_link(struct media_link *link)
{
media_gobj_remove(&link->graph_obj);
kfree(link);
}
void media_remove_intf_link(struct media_link *link)
{
mutex_lock(&link->graph_obj.mdev->graph_mutex);
__media_remove_intf_link(link);
mutex_unlock(&link->graph_obj.mdev->graph_mutex);
}
EXPORT_SYMBOL_GPL(media_remove_intf_link);