Resolved! I have been following the instructions on the wiki to set up STM32CubeProgrammer on dk2. It appears I am missing port parameters. What is the correct command line?
I enter STM32_Programmer_CLI -c port=/dev/bus/usb/010/003 (lsusb reports this is correct) -w flashlayout_st-image-weston/trusted/Flashlayout_sdcard_stm32mp157c-dk2-trusted.tsvudev drivers installed, Ubuntu 20.04Warning: Wrong connect parameter: