I don't know about that. From the INSTALL page:
The "spdif_status" module parameter is used to enable or disable S/PDIF support in the driver. By default S/PDIF is enabled, but can be disabled by setting spdif_status to 0. The driver can only support 48kHz sample rate when S/PDIF is enabled, so disabling it will increase compatability with applications that make assumptions about what sample rates the driver supports.