If so, how? Is there some LV2 API call or something I should be aware of?
Hi! This is not officially supported for LV2 Control Input ports, but the plugin host used in MOD supports a custom extension that allows this to happen.
See LV2-Extensions/control-input-port-change-request.h at master · KXStudio/LV2-Extensions · GitHub for the header file related to this extension.