There are two i2s audio interface on the SoC that are wired up for use;
GPIO 58-61 “Quaternary MI2S” aka “Audio PCM interface #4” aka “Audio MI2S interface #4” is routed to the 4 audio pins on the low speed connector.
GPIO 65-68 “Primary MI2S” aka “Audio PCM interface #1” aka “Audio MI2S interface #1” is routed to the QCA6174 for Bluetooth.
I need to get both of these interfaces operational. I’ve previously worked with the (very different) Hikey960, but its now time to get this working on Dragonboard. In addition to getting the i2s interfaces operational, there is probably also a need to send some kind of configuration to the QCA6174.
Has anybody worked with these interfaces on this hardware?