+SectionPCMCapabilities."DMIC-Capture" { + formats "S16_LE" + rates "48000" + channels_min "2" + channels_max "2" + sig_bits "16" +}NHLT reports 4 microphones on a number of devices, is there any specific reason to limit the capture to 2ch?I believe the generic Hdaudio card now reports the number of channels to pulseaudio, so it's possible that PulseAudio would open a 4ch stream but be told sorry no can do by topology.FWIW we ended-up selecting different topology files in SOF, depending on whether we had 0, 2 or 4 mics.
This patch was prepared to address many issues regarding broken DMIC configurations.
You are right - there are different DMIC configurations on different devices, but, since path multi-configuration feature is not upstreamed in cAVS driver, we are not able to include all of these in one topology file.
This is a reference topology, and it was successfully validated on few production laptops (including models on which DMIC capture was not working).
