[media] media: Entities, pads and links enumeration

Create the following two ioctls and implement them at the media device
level to enumerate entities, pads and links.

- MEDIA_IOC_ENUM_ENTITIES: Enumerate entities and their properties
- MEDIA_IOC_ENUM_LINKS: Enumerate all pads and links for a given entity

Entity IDs can be non-contiguous. Userspace applications should
enumerate entities using the MEDIA_ENT_ID_FLAG_NEXT flag. When the flag
is set in the entity ID, the MEDIA_IOC_ENUM_ENTITIES will return the
next entity with an ID bigger than the requested one.

Only forward links that originate at one of the entity's source pads are
returned during the enumeration process.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Acked-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

1 files changed, 1 insertions, 23 deletions

diff --git a/include/media/media-entity.h b/include/media/media-entity.h
index a9b31d98e3c6..51bdafce72c7 100644
--- a/include/media/media-entity.h
+++ b/include/media/media-entity.h
@@ -24,29 +24,7 @@
 #define _MEDIA_ENTITY_H
 
 #include <linux/list.h>
-
-#define MEDIA_ENT_TYPE_SHIFT            16
-#define MEDIA_ENT_TYPE_MASK             0x00ff0000
-#define MEDIA_ENT_SUBTYPE_MASK          0x0000ffff
-
-#define MEDIA_ENT_T_DEVNODE             (1 << MEDIA_ENT_TYPE_SHIFT)
-#define MEDIA_ENT_T_DEVNODE_V4L         (MEDIA_ENT_T_DEVNODE + 1)
-#define MEDIA_ENT_T_DEVNODE_FB          (MEDIA_ENT_T_DEVNODE + 2)
-#define MEDIA_ENT_T_DEVNODE_ALSA        (MEDIA_ENT_T_DEVNODE + 3)
-#define MEDIA_ENT_T_DEVNODE_DVB         (MEDIA_ENT_T_DEVNODE + 4)
-
-#define MEDIA_ENT_T_V4L2_SUBDEV         (2 << MEDIA_ENT_TYPE_SHIFT)
-#define MEDIA_ENT_T_V4L2_SUBDEV_SENSOR  (MEDIA_ENT_T_V4L2_SUBDEV + 1)
-#define MEDIA_ENT_T_V4L2_SUBDEV_FLASH   (MEDIA_ENT_T_V4L2_SUBDEV + 2)
-#define MEDIA_ENT_T_V4L2_SUBDEV_LENS    (MEDIA_ENT_T_V4L2_SUBDEV + 3)
-
-#define MEDIA_ENT_FL_DEFAULT            (1 << 0)
-
-#define MEDIA_LNK_FL_ENABLED            (1 << 0)
-#define MEDIA_LNK_FL_IMMUTABLE          (1 << 1)
-
-#define MEDIA_PAD_FL_SINK               (1 << 0)
-#define MEDIA_PAD_FL_SOURCE             (1 << 1)
+#include <linux/media.h>
 
 struct media_link {
         struct media_pad *source;       /* Source pad */