Add a function for obtaining the v4l2 sub-device for which
the v4l2 control related ioctl is predestined.
Signed-off-by: Jacek Anaszewski <j.anaszewski@xxxxxxxxxxx>
Acked-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
utils/media-ctl/libv4l2subdev.c | 14 ++++++++++++++
utils/media-ctl/v4l2subdev.h | 15 +++++++++++++++
2 files changed, 29 insertions(+)
diff --git a/utils/media-ctl/libv4l2subdev.c b/utils/media-ctl/libv4l2subdev.c
index 9d48ac1..14e9423 100644
--- a/utils/media-ctl/libv4l2subdev.c
+++ b/utils/media-ctl/libv4l2subdev.c
@@ -1052,3 +1052,17 @@ bool v4l2_subdev_has_v4l2_control_redir(struct media_device *media,
return false;
}
+
+struct media_entity *v4l2_subdev_get_pipeline_entity_by_cid(struct media_device *media,
+ int cid)
+{
+ struct media_entity *entity = media->pipeline;
+
+ while (entity) {
+ if (v4l2_subdev_has_v4l2_control_redir(media, entity, cid))
+ return entity;
+ entity = entity->next;
+ }
+
+ return NULL;
+}
diff --git a/utils/media-ctl/v4l2subdev.h b/utils/media-ctl/v4l2subdev.h
index be2d82e..607ec50 100644
--- a/utils/media-ctl/v4l2subdev.h
+++ b/utils/media-ctl/v4l2subdev.h
@@ -394,4 +394,19 @@ enum v4l2_subdev_fmt_mismatch v4l2_subdev_format_compare(
bool v4l2_subdev_has_v4l2_control_redir(struct media_device *media,
struct media_entity *entity, int ctrl_id);
+/**
+ * @brief Get the first pipeline entity supporting the control
+ * @param media - media device.
+ * @param cid - v4l2 control identifier.
+ *
+ * Get the first entity in the media device pipeline,
+ * for which v4l2_control with cid is to be redirected
+ *
+ * @return associated entity if defined, or NULL if the
+ * control redirection wasn't defined for any entity
+ * in the pipeline
+ */
+struct media_entity *v4l2_subdev_get_pipeline_entity_by_cid(
+ struct media_device *media, int cid);
+
#endif
--
1.7.9.5
--
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