| Message ID | 20220302220304.1327896-5-djrscally@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Introduce ancillary links | expand |
Hi ! Thanks for the patch ! On 02/03/2022 23:03, Daniel Scally wrote: > Add functions to create ancillary links, so that they don't need to > be manually created by users. > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Signed-off-by: Daniel Scally <djrscally@gmail.com> Reviewed-by: Jean-Michel Hautbois <jeanmichel.hautbois@ideasonboard.com> > --- > > Changes since v2: > > - Fixed some typos and comment phrasing (Laurent) > - Changed the position of the new function to go after media_entity_call() > (Laurent) > > Changes since v1: > > - Hardcoded MEDIA_LINK_FL_IMMUTABLE and MEDIA_LINK_FL_ENABLED (Laurent) > > Changes since the rfc: > > - (Laurent) Set gobj0 and gobj1 directly instead of the other union > members > - (Laurent) Added MEDIA_LNK_FL_IMMUTABLE to the kerneldoc for the new > create function > > drivers/media/mc/mc-entity.c | 22 ++++++++++++++++++++++ > include/media/media-entity.h | 19 +++++++++++++++++++ > 2 files changed, 41 insertions(+) > > diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c > index 1a7d0a4fb9e8..d7e2f78a83cc 100644 > --- a/drivers/media/mc/mc-entity.c > +++ b/drivers/media/mc/mc-entity.c > @@ -1032,3 +1032,25 @@ void media_remove_intf_links(struct media_interface *intf) > mutex_unlock(&mdev->graph_mutex); > } > EXPORT_SYMBOL_GPL(media_remove_intf_links); > + > +struct media_link *media_create_ancillary_link(struct media_entity *primary, > + struct media_entity *ancillary) > +{ > + struct media_link *link; > + > + link = media_add_link(&primary->links); > + if (!link) > + return ERR_PTR(-ENOMEM); > + > + link->gobj0 = &primary->graph_obj; > + link->gobj1 = &ancillary->graph_obj; > + link->flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED | > + MEDIA_LNK_FL_ANCILLARY_LINK; > + > + /* Initialize graph object embedded in the new link */ > + media_gobj_create(primary->graph_obj.mdev, MEDIA_GRAPH_LINK, > + &link->graph_obj); > + > + return link; > +} > +EXPORT_SYMBOL_GPL(media_create_ancillary_link); > diff --git a/include/media/media-entity.h b/include/media/media-entity.h > index fea489f03d57..2a58defc4886 100644 > --- a/include/media/media-entity.h > +++ b/include/media/media-entity.h > @@ -1108,4 +1108,23 @@ void media_remove_intf_links(struct media_interface *intf); > (((entity)->ops && (entity)->ops->operation) ? \ > (entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD) > > +/** > + * media_create_ancillary_link() - create an ancillary link between two > + * instances of &media_entity > + * > + * @primary: pointer to the primary &media_entity > + * @ancillary: pointer to the ancillary &media_entity > + * > + * Create an ancillary link between two entities, indicating that they > + * represent two connected pieces of hardware that form a single logical unit. > + * A typical example is a camera lens controller being linked to the sensor that > + * it is supporting. > + * > + * The function sets both MEDIA_LNK_FL_ENABLED and MEDIA_LNK_FL_IMMUTABLE for > + * the new link. > + */ > +struct media_link * > +media_create_ancillary_link(struct media_entity *primary, > + struct media_entity *ancillary); > + > #endif
diff --git a/drivers/media/mc/mc-entity.c b/drivers/media/mc/mc-entity.c index 1a7d0a4fb9e8..d7e2f78a83cc 100644 --- a/drivers/media/mc/mc-entity.c +++ b/drivers/media/mc/mc-entity.c @@ -1032,3 +1032,25 @@ void media_remove_intf_links(struct media_interface *intf) mutex_unlock(&mdev->graph_mutex); } EXPORT_SYMBOL_GPL(media_remove_intf_links); + +struct media_link *media_create_ancillary_link(struct media_entity *primary, + struct media_entity *ancillary) +{ + struct media_link *link; + + link = media_add_link(&primary->links); + if (!link) + return ERR_PTR(-ENOMEM); + + link->gobj0 = &primary->graph_obj; + link->gobj1 = &ancillary->graph_obj; + link->flags = MEDIA_LNK_FL_IMMUTABLE | MEDIA_LNK_FL_ENABLED | + MEDIA_LNK_FL_ANCILLARY_LINK; + + /* Initialize graph object embedded in the new link */ + media_gobj_create(primary->graph_obj.mdev, MEDIA_GRAPH_LINK, + &link->graph_obj); + + return link; +} +EXPORT_SYMBOL_GPL(media_create_ancillary_link); diff --git a/include/media/media-entity.h b/include/media/media-entity.h index fea489f03d57..2a58defc4886 100644 --- a/include/media/media-entity.h +++ b/include/media/media-entity.h @@ -1108,4 +1108,23 @@ void media_remove_intf_links(struct media_interface *intf); (((entity)->ops && (entity)->ops->operation) ? \ (entity)->ops->operation((entity) , ##args) : -ENOIOCTLCMD) +/** + * media_create_ancillary_link() - create an ancillary link between two + * instances of &media_entity + * + * @primary: pointer to the primary &media_entity + * @ancillary: pointer to the ancillary &media_entity + * + * Create an ancillary link between two entities, indicating that they + * represent two connected pieces of hardware that form a single logical unit. + * A typical example is a camera lens controller being linked to the sensor that + * it is supporting. + * + * The function sets both MEDIA_LNK_FL_ENABLED and MEDIA_LNK_FL_IMMUTABLE for + * the new link. + */ +struct media_link * +media_create_ancillary_link(struct media_entity *primary, + struct media_entity *ancillary); + #endif