C++ (Cpp) __media_entity_setup_link_notifyの例

コード例 #1

ファイル: media-entity.c プロジェクト: DirtyDroidX/android_kernel_htc_m8ul

int __media_entity_setup_link(struct media_link *link, u32 flags)
{
	const u32 mask = MEDIA_LNK_FL_ENABLED;
	struct media_device *mdev;
	struct media_entity *source, *sink;
	int ret = -EBUSY;

	if (link == NULL)
		return -EINVAL;

	
	if ((link->flags & ~mask) != (flags & ~mask))
		return -EINVAL;

	if (link->flags & MEDIA_LNK_FL_IMMUTABLE)
		return link->flags == flags ? 0 : -EINVAL;

	if (link->flags == flags)
		return 0;

	source = link->source->entity;
	sink = link->sink->entity;

	if (!(link->flags & MEDIA_LNK_FL_DYNAMIC) &&
	    (source->stream_count || sink->stream_count))
		return -EBUSY;

	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 (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);

	return ret;
}

コード例 #2

ファイル: media-entity.c プロジェクト: 03199618/linux

/**
 * __media_entity_setup_link - Configure a media link
 * @link: The link being configured
 * @flags: Link configuration flags
 *
 * The bulk of link setup is handled by the two entities connected through the
 * link. This function notifies both entities of the link configuration change.
 *
 * If the link is immutable or if the current and new configuration are
 * identical, return immediately.
 *
 * The user is expected to hold link->source->parent->mutex. If not,
 * media_entity_setup_link() should be used instead.
 */
int __media_entity_setup_link(struct media_link *link, u32 flags)
{
	const u32 mask = MEDIA_LNK_FL_ENABLED;
	struct media_device *mdev;
	struct media_entity *source, *sink;
	int ret = -EBUSY;

	if (link == NULL)
		return -EINVAL;

	/* The non-modifiable link flags must not be modified. */
	if ((link->flags & ~mask) != (flags & ~mask))
		return -EINVAL;

	if (link->flags & MEDIA_LNK_FL_IMMUTABLE)
		return link->flags == flags ? 0 : -EINVAL;

	if (link->flags == flags)
		return 0;

	source = link->source->entity;
	sink = link->sink->entity;

	if (!(link->flags & MEDIA_LNK_FL_DYNAMIC) &&
	    (source->stream_count || sink->stream_count))
		return -EBUSY;

	mdev = source->parent;

	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 (mdev->link_notify)
		mdev->link_notify(link, flags, MEDIA_DEV_NOTIFY_POST_LINK_CH);

	return ret;
}