On Wed, Nov 19, 2025 at 01:46:51PM +1100, jslee wrote: > an eMMC operating mode that uses a higher clock speed (200MHz vs 50MHz for > ???HS??? mode) _and also a lower operating voltage_
That _might_ be relevant, because the device seems to be behaving simliarly to, for example, a USB card reader that has no media inserted. So it's plausible that the device is detected and size/manufacturer info is read from the eMMC but data transfers fail. I haven't had time to look more closely at the code so this is basically just a wild guess at this point. > https://adaptivesupport.amd.com/s/article/69368?language=en_US > > not sure if this HS200 mode requires corresponding OS kernel changes/support > or not. Support was added to sdmmc_mem.c back in 2020, see the commit message for revision 1.34.
