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

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
View File

@ -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);

9
include/media/media-entity.h
View File

@ -78,10 +78,12 @@ struct media_link {
union {
struct media_gobj *gobj0;
struct media_pad *source;
struct media_interface *intf;
};
union {
struct media_gobj *gobj1;
struct media_pad *sink;
struct media_entity *entity;
};
struct media_link *reverse; /* Link in the reverse direction */
unsigned long flags; /* Link flags (MEDIA_LNK_FL_*) */
@ -154,6 +156,7 @@ struct media_entity {
* struct media_intf_devnode - Define a Kernel API interface
*
* @graph_obj: embedded graph object
* @links: List of links pointing to graph entities
* @type: Type of the interface as defined at the
* uapi/media/media.h header, e. g.
* MEDIA_INTF_T_*
@ -161,6 +164,7 @@ struct media_entity {
*/
struct media_interface {
struct media_gobj graph_obj;
struct list_head links;
u32 type;
u32 flags;
};
@ -290,6 +294,11 @@ struct media_intf_devnode *media_devnode_create(struct media_device *mdev,
u32 major, u32 minor,
gfp_t gfp_flags);
void media_devnode_remove(struct media_intf_devnode *devnode);
struct media_link *media_create_intf_link(struct media_entity *entity,
struct media_interface *intf,
u32 flags);
void media_remove_intf_link(struct media_link *link);
#define media_entity_call(entity, operation, args...) \
(((entity)->ops && (entity)->ops->operation) ? \
(entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD)