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[media] media-device: export the entity function via new ioctl

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Now that entities have a main function, expose it via
MEDIA_IOC_G_TOPOLOGY ioctl.

Please notice that some entities may have secundary functions.
Such use case will be addressed later, when we add support for the
Media Controller properties.

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 2015-09-06 10:59:08 -03:00
parent 0e576b76f5
commit d87cdb8844
2 changed files with 3 additions and 1 deletions
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1
drivers/media/media-device.c
View File

@ -263,6 +263,7 @@ static long __media_device_get_topology(struct media_device *mdev,
/* Copy fields to userspace struct if not error */
memset(&uentity, 0, sizeof(uentity));
uentity.id = entity->graph_obj.id;
uentity.function = entity->function;
strncpy(uentity.name, entity->name,
sizeof(uentity.name));

3
include/uapi/linux/media.h
View File

@ -276,7 +276,8 @@ struct media_links_enum {
struct media_v2_entity {
__u32 id;
char name[64]; /* FIXME: move to a property? (RFC says so) */
__u16 reserved[14];
__u32 function; /* Main function of the entity */
__u16 reserved[12];
};
/* Should match the specific fields at media_intf_devnode */