I am working on some (major) cleanups for the topology library and I hit the issue with the topology file broadwell.conf in upstream. It cannot be compiled with the latest alsatplg / libatopology, because the SectionPCMConfig was removed in commit 368e4f2a897b5500573a2ee525f5504c135cfca2 in alsa-lib.     Which driver is using this topology in the current linux kernel?

IIRC, the broadwell/SST driver does not use the topology/DPCM parts so it's likely there is no user for this topology file. Keyon/Liam, can you confirm?