[media] media: Links setup
Create the following ioctl and implement it at the media device level to
setup links.
- MEDIA_IOC_SETUP_LINK: Modify the properties of a given link
The only property that can currently be modified is the ENABLED link
flag to enable/disable a link. Links marked with the IMMUTABLE link flag
can not be enabled or disabled.
Enabling or disabling a link has effects on entities' use count. Those
changes are automatically propagated through the graph.
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Stanimir Varbanov <svarbanov@mm-sol.com>
Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/include/linux/media.h b/include/linux/media.h
index 17c93a4..7c69913 100644
--- a/include/linux/media.h
+++ b/include/linux/media.h
@@ -126,5 +126,6 @@
#define MEDIA_IOC_DEVICE_INFO _IOWR('M', 1, struct media_device_info)
#define MEDIA_IOC_ENUM_ENTITIES _IOWR('M', 2, struct media_entity_desc)
#define MEDIA_IOC_ENUM_LINKS _IOWR('M', 3, struct media_links_enum)
+#define MEDIA_IOC_SETUP_LINK _IOWR('M', 4, struct media_link_desc)
#endif /* __LINUX_MEDIA_H */