Hi Tim,
On Thu, Apr 27, 2023 at 2:14 PM Tim Harvey tharvey@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.