Hi Mauro,
On Sun, Aug 30, 2015 at 12:06:17AM -0300, Mauro Carvalho Chehab wrote:
> PADs also need unique object IDs that won't conflict with
> the entity object IDs.
>
> The pad objects are currently created via media_entity_init()
> and, once created, never change.
>
> While this will likely change in the future in order to
> support dynamic changes, for now we'll keep PADs as arrays
> and initialize the media_gobj embedded structs when
> registering the entity.
>
> Signed-off-by: Mauro Carvalho Chehab <[email protected]>
> Acked-by: Hans Verkuil <[email protected]>
>
> diff --git a/drivers/media/media-device.c b/drivers/media/media-device.c
> index 81d6a130efef..3bdda16584fe 100644
> --- a/drivers/media/media-device.c
> +++ b/drivers/media/media-device.c
> @@ -427,6 +427,8 @@ EXPORT_SYMBOL_GPL(media_device_unregister);
> int __must_check media_device_register_entity(struct media_device *mdev,
> struct media_entity *entity)
> {
> + int i;
unsigned int?
> +
> /* Warn if we apparently re-register an entity */
> WARN_ON(entity->parent != NULL);
> entity->parent = mdev;
> @@ -435,6 +437,12 @@ int __must_check media_device_register_entity(struct
> media_device *mdev,
> /* Initialize media_gobj embedded at the entity */
> media_gobj_init(mdev, MEDIA_GRAPH_ENTITY, &entity->graph_obj);
> list_add_tail(&entity->list, &mdev->entities);
> +
> + /* Initialize objects at the pads */
> + for (i = 0; i < entity->num_pads; i++)
> + media_gobj_init(mdev, MEDIA_GRAPH_PAD,
> + &entity->pads[i].graph_obj);
> +
> spin_unlock(&mdev->lock);
>
> return 0;
> @@ -450,12 +458,15 @@ EXPORT_SYMBOL_GPL(media_device_register_entity);
> */
> void media_device_unregister_entity(struct media_entity *entity)
> {
> + int i;
Ditto. It'd be nice to declare short temporary and counter variables as
last (i.e. after mdev).
> struct media_device *mdev = entity->parent;
>
> if (mdev == NULL)
> return;
>
> spin_lock(&mdev->lock);
> + for (i = 0; i < entity->num_pads; i++)
> + media_gobj_remove(&entity->pads[i].graph_obj);
> media_gobj_remove(&entity->graph_obj);
> list_del(&entity->list);
> spin_unlock(&mdev->lock);
> diff --git a/drivers/media/media-entity.c b/drivers/media/media-entity.c
> index 888cb88e19bf..377c6655c5d0 100644
> --- a/drivers/media/media-entity.c
> +++ b/drivers/media/media-entity.c
> @@ -48,6 +48,9 @@ void media_gobj_init(struct media_device *mdev,
> case MEDIA_GRAPH_ENTITY:
> gobj->id = media_gobj_gen_id(type, ++mdev->entity_id);
> break;
> + case MEDIA_GRAPH_PAD:
> + gobj->id = media_gobj_gen_id(type, ++mdev->pad_id);
> + break;
> }
> }
>
> diff --git a/include/media/media-device.h b/include/media/media-device.h
> index f6deef6e5820..9493721f630e 100644
> --- a/include/media/media-device.h
> +++ b/include/media/media-device.h
> @@ -42,6 +42,7 @@ struct device;
> * @hw_revision: Hardware device revision
> * @driver_version: Device driver version
> * @entity_id: Unique ID used on the last entity registered
> + * @pad_id: Unique ID used on the last pad registered
> * @entities: List of registered entities
> * @lock: Entities list lock
> * @graph_mutex: Entities graph operation lock
> @@ -69,6 +70,7 @@ struct media_device {
> u32 driver_version;
>
> u32 entity_id;
> + u32 pad_id;
>
> struct list_head entities;
>
> diff --git a/include/media/media-entity.h b/include/media/media-entity.h
> index bb74b5883cbb..ce4c654486d6 100644
> --- a/include/media/media-entity.h
> +++ b/include/media/media-entity.h
> @@ -34,9 +34,11 @@
> * enum media_gobj_type - type of a graph object
> *
> * @MEDIA_GRAPH_ENTITY: Identify a media entity
> + * @MEDIA_GRAPH_PAD: Identify a media pad
> */
> enum media_gobj_type {
> MEDIA_GRAPH_ENTITY,
> + MEDIA_GRAPH_PAD,
> };
>
> #define MEDIA_BITS_PER_TYPE 8
> @@ -72,6 +74,7 @@ struct media_link {
> };
>
> struct media_pad {
> + struct media_gobj graph_obj;
> struct media_entity *entity; /* Entity this pad belongs to */
> u16 index; /* Pad index in the entity pads array */
> unsigned long flags; /* Pad flags (MEDIA_PAD_FL_*) */
--
Kind regards,
Sakari Ailus
e-mail: [email protected] XMPP: [email protected]
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