diff options
| author | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-08-23 08:00:33 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-01-11 12:18:53 -0200 |
| commit | 9155d859b6bec29cdbbd80a509be35de55115f00 (patch) | |
| tree | 994e634d93e8652cd1105b83ac565d91c21546d4 /include/media | |
| parent | 05bfa9fa1cda91953e1b5975b059542b83c5245c (diff) | |
| download | linux-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.h | 12 |
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) |