The UHD-SDI TX Subsystem is delivered with a Baremetal driver and API designed to handle all programming of the subsystem core. This driver is automatically available in the AMD Vitis™ development platform when you create from a .xsa file, which includes the UHD-SDI TX Subsystem. This Baremetal driver is also available from the AMD GitHub. The example designs in Example Design showcase the use of the drivers in an application.
Information on Linux drivers can be found on the AMD Wiki.