diff options
| author | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2015-08-23 11:00:33 (GMT) |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-01-11 14:18:53 (GMT) |
| commit | 9155d859b6bec29cdbbd80a509be35de55115f00 (patch) | |
| tree | 994e634d93e8652cd1105b83ac565d91c21546d4 /drivers/media | |
| parent | 05bfa9fa1cda91953e1b5975b059542b83c5245c (diff) | |
| download | linux-9155d859b6bec29cdbbd80a509be35de55115f00.tar.xz | |
[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 'drivers/media')
| -rw-r--r-- | drivers/media/media-device.c | 2 | ||||
| -rw-r--r-- | drivers/media/media-entity.c | 17 |
2 files changed, 8 insertions, 11 deletions
diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c index ec98595..5b2c9f7 100644 --- a/drivers/media/media-device.c +++ b/drivers/media/media-device.c @@ -382,6 +382,8 @@ int __must_check __media_device_register(struct media_device *mdev, INIT_LIST_HEAD(&mdev->entities); INIT_LIST_HEAD(&mdev->interfaces); + INIT_LIST_HEAD(&mdev->pads); + INIT_LIST_HEAD(&mdev->links); spin_lock_init(&mdev->lock); mutex_init(&mdev->graph_mutex); diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c index b3875b0..2f3d3aa 100644 --- a/drivers/media/media-entity.c +++ b/drivers/media/media-entity.c @@ -162,13 +162,15 @@ void media_gobj_init(struct media_device *mdev, break; case MEDIA_GRAPH_PAD: gobj->id = media_gobj_gen_id(type, ++mdev->pad_id); + list_add_tail(&gobj->list, &mdev->pads); break; case MEDIA_GRAPH_LINK: gobj->id = media_gobj_gen_id(type, ++mdev->link_id); + list_add_tail(&gobj->list, &mdev->links); break; case MEDIA_GRAPH_INTF_DEVNODE: - list_add_tail(&gobj->list, &mdev->interfaces); gobj->id = media_gobj_gen_id(type, ++mdev->intf_devnode_id); + list_add_tail(&gobj->list, &mdev->interfaces); break; } dev_dbg_obj(__func__, gobj); @@ -183,17 +185,10 @@ void media_gobj_init(struct media_device *mdev, */ void media_gobj_remove(struct media_gobj *gobj) { - /* Remove the object from mdev list */ - switch (media_type(gobj)) { - case MEDIA_GRAPH_ENTITY: - case MEDIA_GRAPH_INTF_DEVNODE: - list_del(&gobj->list); - break; - default: - break; - } - dev_dbg_obj(__func__, gobj); + + /* Remove the object from mdev list */ + list_del(&gobj->list); } /** |