xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

[media] media: Change media device link_notify behaviour

Browse Source 
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>
This commit is contained in:
Sylwester Nawrocki
2013-05-31 10:37:26 -03:00
committed by Mauro Carvalho Chehab
parent 4434adff80
commit 813f5c0ac5
4 changed files with 47 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/media/media-device.h
View File

@@ -45,6 +45,7 @@ struct device;
* @entities: List of registered entities
* @lock: Entities list lock
* @graph_mutex: Entities graph operation lock
* @link_notify: Link state change notification callback
*
* This structure represents an abstract high-level media device. It allows easy
* access to entities and provides basic media device-level support. The
@@ -75,10 +76,14 @@ struct media_device {
/* Serializes graph operations. */
struct mutex graph_mutex;
int (*link_notify)(struct media_pad *source,
struct media_pad *sink, u32 flags);
int (*link_notify)(struct media_link *link, u32 flags,
unsigned int notification);
};
/* Supported link_notify @notification values. */
#define MEDIA_DEV_NOTIFY_PRE_LINK_CH 0
#define MEDIA_DEV_NOTIFY_POST_LINK_CH 1
/* media_devnode to media_device */
#define to_media_device(node) container_of(node, struct media_device, devnode)