Ya. USB 3.0 (aka XUSB) requires firmware to be uploaded to the controller. In the L4T image, the firmware resides in the root file system and is loaded by the kernel depending upon the ODMdata settings provided when flashing (which cause additional kernel command line parameters to be passed). For this use case, create an initial ramdisk to provide the XUSB firmware, and flash that to eMMC along with the kernel.
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