Hi Mauro,
Thank you for the patch.
On Wednesday 19 August 2015 08:01:50 Mauro Carvalho Chehab wrote:
> As entities are graph elements, let's embed media_gobj
> on it. That ensures an unique ID for entities that can be
> global along the entire media controller.
>
> For now, we'll keep the already existing entity ID. Such
> field need to be dropped at some point, but for now, let's
> not do this, to avoid needing to review all drivers and
> the userspace apps.
>
> Signed-off-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
> Acked-by: Hans Verkuil <hans.verk...@cisco.com>
> Signed-off-by: Mauro Carvalho Chehab <mche...@osg.samsung.com>
>
> diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
> index e429605ca2c3..81d6a130efef 100644
> --- a/drivers/media/media-device.c
> +++ b/drivers/media/media-device.c
> @@ -379,7 +379,6 @@ int __must_check __media_device_register(struct
> media_device *mdev, if (WARN_ON(mdev->dev == NULL || mdev->model[0] == 0))
> return -EINVAL;
>
> - mdev->entity_id = 1;
> INIT_LIST_HEAD(&mdev->entities);
> spin_lock_init(&mdev->lock);
> mutex_init(&mdev->graph_mutex);
> @@ -433,10 +432,8 @@ int __must_check media_device_register_entity(struct
> media_device *mdev, entity->parent = mdev;
>
> spin_lock(&mdev->lock);
> - if (entity->id == 0)
> - entity->id = mdev->entity_id++;
> - else
> - mdev->entity_id = max(entity->id + 1, mdev->entity_id);
> + /* Initialize media_gobj embedded at the entity */
> + media_gobj_init(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj);
Graph object initialization should be moved to media_entity_init() to keep
initialization separate from registration.
> list_add_tail(&entity->list, &mdev->entities);
> spin_unlock(&mdev->lock);
>
> @@ -459,6 +456,7 @@ void media_device_unregister_entity(struct media_entity
> *entity) return;
>
> spin_lock(&mdev->lock);
> + media_gobj_remove(&entity->graph_obj);
> list_del(&entity->list);
> spin_unlock(&mdev->lock);
> entity->parent = NULL;
> diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
> index 4834172bf6f8..888cb88e19bf 100644
> --- a/drivers/media/media-entity.c
> +++ b/drivers/media/media-entity.c
> @@ -43,7 +43,12 @@ void media_gobj_init(struct media_device *mdev,
> enum media_gobj_type type,
> struct media_gobj *gobj)
> {
> - /* For now, nothing to do */
> + /* Create a per-type unique object ID */
> + switch (type) {
> + case MEDIA_GRAPH_ENTITY:
> + gobj->id = media_gobj_gen_id(type, ++mdev->entity_id);
> + break;
> + }
> }
>
> /**
> diff --git a/include/media/media-device.h b/include/media/media-device.h
> index a44f18fdf321..f6deef6e5820 100644
> --- a/include/media/media-device.h
> +++ b/include/media/media-device.h
> @@ -41,7 +41,7 @@ struct device;
> * @bus_info: Unique and stable device location identifier
> * @hw_revision: Hardware device revision
> * @driver_version: Device driver version
> - * @entity_id: ID of the next entity to be registered
> + * @entity_id: Unique ID used on the last entity registered
> * @entities: List of registered entities
> * @lock: Entities list lock
> * @graph_mutex: Entities graph operation lock
> @@ -69,6 +69,7 @@ struct media_device {
> u32 driver_version;
>
> u32 entity_id;
> +
> struct list_head entities;
>
> /* Protects the entities list */
> diff --git a/include/media/media-entity.h b/include/media/media-entity.h
> index c1cd4fba051d..9ca366334bcf 100644
> --- a/include/media/media-entity.h
> +++ b/include/media/media-entity.h
> @@ -33,10 +33,10 @@
> /**
> * enum media_gobj_type - type of a graph element
> *
> + * @MEDIA_GRAPH_ENTITY: Identify a media entity
I think we should explicitly define here what an entity is.
> */
> enum media_gobj_type {
> - /* FIXME: add the types here, as we embed media_gobj */
> - MEDIA_GRAPH_NONE
> + MEDIA_GRAPH_ENTITY,
> };
>
> #define MEDIA_BITS_PER_TYPE 8
> @@ -94,10 +94,9 @@ struct media_entity_operations {
> };
>
> struct media_entity {
> + struct media_gobj graph_obj;
> struct list_head list;
> struct media_device *parent; /* Media device this entity belongs to*/
> - u32 id; /* Entity ID, unique in the parent media
> - * device context */
> const char *name; /* Entity name */
> u32 type; /* Entity type (MEDIA_ENT_T_*) */
> u32 revision; /* Entity revision, driver specific */
> @@ -148,7 +147,7 @@ static inline u32 media_entity_subtype(struct
> media_entity *entity)
>
> static inline u32 media_entity_id(struct media_entity *entity)
> {
> - return entity->id;
> + return entity->graph_obj.id;
> }
>
> static inline enum media_gobj_type media_type(struct media_gobj *gobj)
--
Regards,
Laurent Pinchart
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