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authorMauro Carvalho Chehab <mchehab@osg.samsung.com>2015-08-23 08:00:33 -0300
committerMauro Carvalho Chehab <mchehab@osg.samsung.com>2016-01-11 12:18:53 -0200
commit9155d859b6bec29cdbbd80a509be35de55115f00 (patch)
tree994e634d93e8652cd1105b83ac565d91c21546d4 /include/media
parent05bfa9fa1cda91953e1b5975b059542b83c5245c (diff)
downloadlinux-9155d859b6bec29cdbbd80a509be35de55115f00.tar.bz2
[media] media-device: add pads and links to media_device
The MC next gen API sends objects to userspace grouped by their types. In the case of pads and links, in order to improve performance and have a simpler code, the best is to store them also on separate linked lists at MC. If we don't do that, we would need this kind of interaction to send data to userspace (code is in structured english): for each entity: for each pad: store pads for each entity: for each link: store link for each interface: for each link: store link With would require one nested loop for pads and two nested loops for links. By using separate linked lists for them, just one loop would be enough. Acked-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'include/media')
-rw-r--r--include/media/media-device.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/media/media-device.h b/include/media/media-device.h
index 85fa302047bd..0d1b9c687454 100644
--- a/include/media/media-device.h
+++ b/include/media/media-device.h
@@ -47,6 +47,8 @@ struct device;
* @intf_devnode_id: Unique ID used on the last interface devnode registered
* @entities: List of registered entities
* @interfaces: List of registered interfaces
+ * @pads: List of registered pads
+ * @links: List of registered links
* @lock: Entities list lock
* @graph_mutex: Entities graph operation lock
* @link_notify: Link state change notification callback
@@ -79,6 +81,8 @@ struct media_device {
struct list_head entities;
struct list_head interfaces;
+ struct list_head pads;
+ struct list_head links;
/* Protects the entities list */
spinlock_t lock;
@@ -117,6 +121,14 @@ struct media_device *media_device_find_devres(struct device *dev);
#define media_device_for_each_intf(intf, mdev) \
list_for_each_entry(intf, &(mdev)->interfaces, graph_obj.list)
+/* Iterate over all pads. */
+#define media_device_for_each_pad(pad, mdev) \
+ list_for_each_entry(pad, &(mdev)->pads, graph_obj.list)
+
+/* Iterate over all links. */
+#define media_device_for_each_link(link, mdev) \
+ list_for_each_entry(link, &(mdev)->links, graph_obj.list)
+
#else
static inline int media_device_register(struct media_device *mdev)