Qualcomm's ARM processors are set ... including NVMe over PCIe, sound machine driver, PMC8380 PMIC, Pinctrl (TLMM), Phy (PCIe/eDP/USB), reference board support (CRD/QCP), and system cache.
Qualcomm is making good ... been implemented include the DWC3 sound driver, reference board support, ADSP/CDSP support, multimedia clocks, PCIe/eDP/USB Phy, and system caching through NVMe SSDs ...
The USB Class ASIO driver is a few months out ... It could very well be a chicken-and-egg scenario, but Qualcomm is very active and committed to helping developers make this leap.