I'm trying to configure my Beocreate amp on a Raspberry Pi 3 with Raspbian*. I've installed the dsptoolkit and used it to apply the Basic Full Range profile. While the card is working well for audio produced on the Pi, the optical input is disabled. HiFiBerry support said that the SPDIF input needed to be enabled in the DSP profile, and that none of the pre-made ones had this.
How can I enable optical audio input without needing to use HiFiBerryOS?
* I'm using Raspbian because it's the only way I've been able to figure out how to make Kodi and the DSP toolkit work together. Swapping from LibreELEC to HiFiBerryOS and back requires me to power down the amp, which triggers the known 16% DSPVolume error (and also doesn't allow optical input).