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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2009-12-09 08:40:03 -0300
committerMauro Carvalho Chehab <mchehab@redhat.com>2011-03-22 04:53:16 -0300
commit97548ed4c4661502cdfd1aabd5d3876fa4f5cc2e (patch)
treec85b85954f53e3a97b6590de8d5d5396e7c43358 /include/media/media-entity.h
parent1651333b09743887bc2dd3d158a11853a2be3fe7 (diff)
[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>
Diffstat (limited to 'include/media/media-entity.h')
-rw-r--r--include/media/media-entity.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index 51bdafce72c7..d889dcc67d0d 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -39,6 +39,12 @@ struct media_pad {
unsigned long flags; /* Pad flags (MEDIA_PAD_FL_*) */
};
+struct media_entity_operations {
+ int (*link_setup)(struct media_entity *entity,
+ const struct media_pad *local,
+ const struct media_pad *remote, u32 flags);
+};
+
struct media_entity {
struct list_head list;
struct media_device *parent; /* Media device this entity belongs to*/
@@ -59,6 +65,8 @@ struct media_entity {
struct media_pad *pads; /* Pads array (num_pads elements) */
struct media_link *links; /* Links array (max_links elements)*/
+ const struct media_entity_operations *ops; /* Entity operations */
+
/* Reference counts must never be negative, but are signed integers on
* purpose: a simple WARN_ON(<0) check can be used to detect reference
* count bugs that would make them negative.
@@ -112,6 +120,11 @@ int media_entity_init(struct media_entity *entity, u16 num_pads,
void media_entity_cleanup(struct media_entity *entity);
int media_entity_create_link(struct media_entity *source, u16 source_pad,
struct media_entity *sink, u16 sink_pad, u32 flags);
+int __media_entity_setup_link(struct media_link *link, u32 flags);
+int media_entity_setup_link(struct media_link *link, u32 flags);
+struct media_link *media_entity_find_link(struct media_pad *source,
+ struct media_pad *sink);
+struct media_pad *media_entity_remote_source(struct media_pad *pad);
struct media_entity *media_entity_get(struct media_entity *entity);
void media_entity_put(struct media_entity *entity);
@@ -121,4 +134,8 @@ void media_entity_graph_walk_start(struct media_entity_graph *graph,
struct media_entity *
media_entity_graph_walk_next(struct media_entity_graph *graph);
+#define media_entity_call(entity, operation, args...) \
+ (((entity)->ops && (entity)->ops->operation) ? \
+ (entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD)
+
#endif