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media: mc: entity: Add has_pad_interdep entity operation 

Add a new media entity operation, has_pad_interdep. The optional op is
used to discover the pad interdependencies inside an entity during the
pipeline construction.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Tomi Valkeinen 2022-08-31 16:13:38 +02:00 committed by Mauro Carvalho Chehab
parent ae21987283
commit 5b4f9a7275
2 changed files with 18 additions and 2 deletions
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8
drivers/media/mc/mc-entity.c
View File

@ -232,7 +232,10 @@ EXPORT_SYMBOL_GPL(media_entity_pads_init);
* and enabling one of the pads means that the other pad will become "locked"
* and doesn't allow configuration changes.
*
* For the time being all pads are considered interdependent.
* This function uses the &media_entity_operations.has_pad_interdep() operation
* to check the dependency inside the entity between @pad0 and @pad1. If the
* has_pad_interdep operation is not implemented, all pads of the entity are
* considered to be interdependent.
*/
static bool media_entity_has_pad_interdep(struct media_entity *entity,
unsigned int pad0, unsigned int pad1)
@ -244,7 +247,10 @@ static bool media_entity_has_pad_interdep(struct media_entity *entity,
(MEDIA_PAD_FL_SINK | MEDIA_PAD_FL_SOURCE))
return false;
if (!entity->ops || !entity->ops->has_pad_interdep)
return true;
return entity->ops->has_pad_interdep(entity, pad0, pad1);
}
static struct media_entity *

10
include/media/media-entity.h
View File

@ -237,6 +237,14 @@ struct media_pad {
* @link_validate: Return whether a link is valid from the entity point of
* view. The media_pipeline_start() function
* validates all links by calling this operation. Optional.
* @has_pad_interdep: Return whether a two pads inside the entity are
* interdependent. If two pads are interdependent they are
* part of the same pipeline and enabling one of the pads
* means that the other pad will become "locked" and
* doesn't allow configuration changes. pad0 and pad1 are
* guaranteed to not both be sinks or sources.
* Optional: If the operation isn't implemented all pads
* will be considered as interdependent.
*
* .. note::
*
@ -250,6 +258,8 @@ struct media_entity_operations {
const struct media_pad *local,
const struct media_pad *remote, u32 flags);
int (*link_validate)(struct media_link *link);
bool (*has_pad_interdep)(struct media_entity *entity, unsigned int pad0,
unsigned int pad1);
};
/**