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[media] media-entity.h: get rid of revision and group_id fields

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Both revision and group_id fields were never used and were always
initialized to zero. Remove them.

Suggested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
This commit is contained in:
Mauro Carvalho Chehab 2015-12-11 08:02:19 -02:00
parent ab22e77cd3
commit 8ed8c88c46
4 changed files with 9 additions and 24 deletions
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13
Documentation/DocBook/media/v4l/media-ioc-enum-entities.xml
View file

@ -59,15 +59,6 @@
<para>Entity IDs can be non-contiguous. Applications must
<emphasis>not</emphasis> try to enumerate entities by calling
MEDIA_IOC_ENUM_ENTITIES with increasing id's until they get an error.</para>
<para>Two or more entities that share a common non-zero
<structfield>group_id</structfield> value are considered as logically
grouped. Groups are used to report
<itemizedlist>
<listitem><para>ALSA, VBI and video nodes that carry the same media
stream</para></listitem>
<listitem><para>lens and flash controllers associated with a sensor</para></listitem>
</itemizedlist>
</para>
<table pgwide="1" frame="none" id="media-entity-desc">
<title>struct <structname>media_entity_desc</structname></title>
@ -106,7 +97,7 @@
<entry><structfield>revision</structfield></entry>
<entry></entry>
<entry></entry>
<entry>Entity revision in a driver/hardware specific format.</entry>
<entry>Entity revision. Always zero (obsolete)</entry>
</row>
<row>
<entry>__u32</entry>
@ -120,7 +111,7 @@
<entry><structfield>group_id</structfield></entry>
<entry></entry>
<entry></entry>
<entry>Entity group ID</entry>
<entry>Entity group ID. Always zero (obsolete)</entry>
</row>
<row>
<entry>__u16</entry>

12
Documentation/media-framework.txt
View file

@ -110,10 +110,10 @@ If no pads are needed, drivers could directly fill entity->num_pads
with 0 and entity->pads with NULL or to call the above function that
will do the same.
The media_entity name, type, flags, revision and group_id fields should be
initialized before calling media_device_register_entity(). Entities embedded
in higher-level standard structures can have some of those fields set by the
higher-level framework.
The media_entity name, type and flags fields should be initialized before
calling media_device_register_entity(). Entities embedded in higher-level
standard structures can have some of those fields set by the higher-level
framework.
As the number of pads is known in advance, the pads array is not allocated
dynamically but is managed by the entity driver. Most drivers will embed the
@ -164,9 +164,7 @@ Entities have flags that describe the entity capabilities and state.
Logical entity groups can be defined by setting the group ID of all member
entities to the same non-zero value. An entity group serves no purpose in the
kernel, but is reported to userspace during entities enumeration. The group_id
field belongs to the media device driver and must not by touched by entity
drivers.
kernel, but is reported to userspace during entities enumeration.
Media device drivers should define groups if several entities are logically
bound together. Example usages include reporting

4
drivers/media/media-device.c
View file

@ -109,9 +109,9 @@ static long media_device_enum_entities(struct media_device *mdev,
if (ent->name)
strlcpy(u_ent.name, ent->name, sizeof(u_ent.name));
u_ent.type = ent->function;
u_ent.revision = ent->revision;
u_ent.revision = 0; /* Unused */
u_ent.flags = ent->flags;
u_ent.group_id = ent->group_id;
u_ent.group_id = 0; /* Unused */
u_ent.pads = ent->num_pads;
u_ent.links = ent->num_links - ent->num_backlinks;
memcpy(&u_ent.raw, &ent->info, sizeof(ent->info));

4
include/media/media-entity.h
View file

@ -153,9 +153,7 @@ struct media_entity_operations {
* @name: Entity name.
* @function: Entity main function, as defined in uapi/media.h
* (MEDIA_ENT_F_*)
* @revision: Entity revision - OBSOLETE - should be removed soon.
* @flags: Entity flags, as defined in uapi/media.h (MEDIA_ENT_FL_*)
* @group_id: Entity group ID - OBSOLETE - should be removed soon.
* @num_pads: Number of sink and source pads.
* @num_links: Total number of links, forward and back, enabled and disabled.
* @num_backlinks: Number of backlinks
@ -180,9 +178,7 @@ struct media_entity {
struct media_gobj graph_obj; /* must be first field in struct */
const char *name;
u32 function;
u32 revision;
unsigned long flags;
u32 group_id;
u16 num_pads;
u16 num_links;