If this is the wrong place to ask, please feel free to redirect me to another location.
I'm thinking about using an SBC to create an application-specific coprocessor. A laptop would stream h.264/h.265 2kx2.5k yuv420p compressed video thru USB to the SBC (functioning as a USB gadget with separate power supply) and the SBC would decompress the video frames, apply a sequence of affine transforms to each (decompressed) image, and stream the warped, decompressed images back to the host. This would use the SBC hardware-assisted VPU decompression and GPU for warp processing, and the Arm CPU side would manage the YUV420p-RGB conversion and buffered super-speed USB transfers.
To minimize transfer latency, I'd prefer to use some flavor of USB 3 for the host-to-SBC communication.
Looking around, while I see many boards with USB 3.0, 3.1, and a few claiming 3.2 host support, most of the OTG USB ports (which can operate in device mode) only appear to work as USB 2 ports.
I've seen several rx3399 boards which claim USB 3 OTG support (suck as Rock Pi 4a/c, and the Rock Pi X cherry trail board), but apart from a few other rx3399 boards (and that one Rock pi X cherry trail board), I haven't seen any other SBCs with USB 3 OTG.
I'm curious; have you seen other SBCs (available) that support USB 3 device mode (or OTG that are capable of device mode) apart from those built on the rk3399 chip?
(I guess another alternative might be to use a usb3-to-5gigabit ethernet adapter on the SBC and another on the laptop.)
Comments and suggestions welcome.
Thanks,
-Tom
