Support on mst board

Hi Nvidia:
We are surveying the MST board suits for Jetson AGX Orin 64GB.
From spec, we saw the MST board is supported (Display: 1x8K60 multi-mode DP 1.4a(_MST)):

However, a topic by WayneWWW said:

Seems like only limited MST mode is supported.
So, we would like to confirm that:

AGX Orin have MST board support, but ONLY for DP output split to 2 DPs.
Others like HDMI output to DP + HDMI, or DP output to HDMI + HDMI is not guaranteed?

Please help.

Many Thanks.

Hi @jameskuo

Could you share what is the brand/model that MST hub you are using with DP-> HDMI x2 and failed?

Hi WayneWWW:
Sorry for the late response. We are using Synaptics vmm5320.
We are trying to use DP → DP + HDMI or DP → HDMI + HDMI. DP → 2 HDMI works fine. However, when the HDMI is connected (FHD or 800x480), DP output is not able to display 4K @ 60.

After confirming with the vendor of the MST hub, we found that someone also encounter an issue about this. Hence, we gave it a shot about disabling DSC feature in the driver:

Now, the configuration of DP → DP (4K) + HDMI can work properly.
Huge sorry for the lack of investigation.