forked from luck/tmp_suning_uos_patched
[media] media: entity: Add media_entity_get_fwnode_pad() function
This is a wrapper around the media entity get_fwnode_pad operation. Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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@ -18,6 +18,7 @@
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#include <linux/bitmap.h>
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#include <linux/module.h>
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#include <linux/property.h>
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#include <linux/slab.h>
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#include <media/media-entity.h>
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#include <media/media-device.h>
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@ -386,6 +387,41 @@ struct media_entity *media_graph_walk_next(struct media_graph *graph)
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}
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EXPORT_SYMBOL_GPL(media_graph_walk_next);
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int media_entity_get_fwnode_pad(struct media_entity *entity,
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struct fwnode_handle *fwnode,
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unsigned long direction_flags)
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{
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struct fwnode_endpoint endpoint;
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unsigned int i;
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int ret;
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if (!entity->ops || !entity->ops->get_fwnode_pad) {
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for (i = 0; i < entity->num_pads; i++) {
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if (entity->pads[i].flags & direction_flags)
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return i;
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}
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return -ENXIO;
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}
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ret = fwnode_graph_parse_endpoint(fwnode, &endpoint);
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if (ret)
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return ret;
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ret = entity->ops->get_fwnode_pad(&endpoint);
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if (ret < 0)
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return ret;
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if (ret >= entity->num_pads)
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return -ENXIO;
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if (!(entity->pads[ret].flags & direction_flags))
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return -ENXIO;
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return ret;
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}
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EXPORT_SYMBOL_GPL(media_entity_get_fwnode_pad);
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/* -----------------------------------------------------------------------------
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* Pipeline management
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*/
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@ -820,6 +820,29 @@ struct media_pad *media_entity_remote_pad(struct media_pad *pad);
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*/
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struct media_entity *media_entity_get(struct media_entity *entity);
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/**
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* media_entity_get_fwnode_pad - Get pad number from fwnode
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*
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* @entity: The entity
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* @fwnode: Pointer to the fwnode_handle which should be used to find the pad
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* @direction_flags: Expected direction of the pad, as defined in
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* :ref:`include/uapi/linux/media.h <media_header>`
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* (seek for ``MEDIA_PAD_FL_*``)
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*
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* This function can be used to resolve the media pad number from
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* a fwnode. This is useful for devices which use more complex
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* mappings of media pads.
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*
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* If the entity dose not implement the get_fwnode_pad() operation
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* then this function searches the entity for the first pad that
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* matches the @direction_flags.
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*
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* Return: returns the pad number on success or a negative error code.
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*/
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int media_entity_get_fwnode_pad(struct media_entity *entity,
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struct fwnode_handle *fwnode,
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unsigned long direction_flags);
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/**
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* media_graph_walk_init - Allocate resources used by graph walk.
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*
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