diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0770-media-entity-Add-support-for-ancillary-links.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.15/950-0770-media-entity-Add-support-for-ancillary-links.patch | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0770-media-entity-Add-support-for-ancillary-links.patch b/target/linux/bcm27xx/patches-5.15/950-0770-media-entity-Add-support-for-ancillary-links.patch new file mode 100644 index 0000000000..aaf1177292 --- /dev/null +++ b/target/linux/bcm27xx/patches-5.15/950-0770-media-entity-Add-support-for-ancillary-links.patch @@ -0,0 +1,69 @@ +From f07c6a12bf8b432e70d312ab60b0a07197fa8162 Mon Sep 17 00:00:00 2001 +From: Daniel Scally <djrscally@gmail.com> +Date: Wed, 2 Mar 2022 22:03:03 +0000 +Subject: [PATCH] media: entity: Add support for ancillary links + +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> +--- + drivers/media/mc/mc-entity.c | 22 ++++++++++++++++++++++ + include/media/media-entity.h | 19 +++++++++++++++++++ + 2 files changed, 41 insertions(+) + +--- a/drivers/media/mc/mc-entity.c ++++ b/drivers/media/mc/mc-entity.c +@@ -1050,3 +1050,25 @@ void media_remove_intf_links(struct medi + 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); +--- a/include/media/media-entity.h ++++ b/include/media/media-entity.h +@@ -1107,4 +1107,23 @@ void media_remove_intf_links(struct medi + (((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 |