Hi Tim, On Thu, Apr 27, 2023 at 2:14 PM Tim Harvey <thar...@gateworks.com> wrote:
> I haven't heard any response here so I did some more digging. This > hang should be affecting all imx8mm/imx8mn devices that have USB host > controllers configured for host mode (dr_mode = "host") and would > appear for anyone that ever does a 'usb stop' (or does a 'usb start' > followed by a kernel boot for example of loading kernel from USB) in > U-Boot. Yes, I recall seeing this issue some time ago but never got a chance to debug it. Just tested mainline U-Boot on an imx8mm-evk and there is still a different issue: "ums 0 mmc 1" works fine for the first time and it mounts the content of the SD card correctly on the PC. After hitting CTRL+C: CTRL+C - Operation aborted clk usb_bus already disabled And after running "ums 0 mmc 1" again, it does not mount the SD card anymore.