NVIDIA DP MST Audio To Begin Working With The Linux 5.5 Kernel

NVIDIA has submitted the ALSA patches for allowing their hardware to work with DP-MST audio in the hardware/driver configuration. NVIDIA had to plumb in the DP-MST jack support, support for non-acomp codecs, and then lastly add the support to the HDA HDMI audio driver.
Audio over DP-MST is supported with NVIDIA Kepler GK104 GPUs and newer.
This NVIDIA DP MST audio support is queued in the sound subsystem's "-next" branch ahead of the Linux 5.5 merge window opening next week.
The sound updates for Linux 5.5 are also bringing Cometlake-S PCI IDs, a headset/mic port fix for Xiami laptops, an HDMI audio fix for Intel Tiger Lake, and various other fixes.
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