[media] media: Change media device link_notify behaviour
Currently the media device link_notify callback is invoked before the
actual change of state of a link when the link is being enabled, and
after the actual change of state when the link is being disabled.
This doesn't allow a media device driver to perform any operations
on a full graph before a link is disabled, as well as performing
any tasks on a modified graph right after a link's state is changed.
This patch modifies signature of the link_notify callback. This
callback is now called always before and after a link's state change.
To distinguish the notifications a 'notification' argument is added
to the link_notify callback: MEDIA_DEV_NOTIFY_PRE_LINK_CH indicates
notification before link's state change and
MEDIA_DEV_NOTIFY_POST_LINK_CH corresponds to a notification after
link flags change.
[mchehab@redhat.com: whitespace cleanups]
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
index 0438209..df72f7d 100644
--- a/drivers/media/media-entity.c
+++ b/drivers/media/media-entity.c
@@ -496,25 +496,17 @@
mdev = source->parent;
- if ((flags & MEDIA_LNK_FL_ENABLED) && mdev->link_notify) {
- ret = mdev->link_notify(link->source, link->sink,
- MEDIA_LNK_FL_ENABLED);
+ if (mdev->link_notify) {
+ ret = mdev->link_notify(link, flags,
+ MEDIA_DEV_NOTIFY_PRE_LINK_CH);
if (ret < 0)
return ret;
}
ret = __media_entity_setup_link_notify(link, flags);
- if (ret < 0)
- goto err;
- if (!(flags & MEDIA_LNK_FL_ENABLED) && mdev->link_notify)
- mdev->link_notify(link->source, link->sink, 0);
-
- return 0;
-
-err:
- if ((flags & MEDIA_LNK_FL_ENABLED) && mdev->link_notify)
- mdev->link_notify(link->source, link->sink, 0);
+ if (mdev->link_notify)
+ mdev->link_notify(link, flags, MEDIA_DEV_NOTIFY_POST_LINK_CH);
return ret;
}