Re: mmc-utils: ioctl connection timed out with SD cards

[Dominik 'Rathann' Mierzejewski <dominik@greysector.net>]

On Monday, 03 April 2023 at 22:11, Christian Löhle wrote:
> >Hello,
> >is the mmc tool from mmc-utils supposed to work with SD cards?
> Not really no, but status get is pretty much the one thing that should
> work, apart from register reads that don't issue anything.

I see. I thought any /dev/mmcblk? device would be supported. The
documentation doesn't make this clear. :)

> I'm using RK3399 on SD too and it works okay for me, will try updating
> tomorrow.
> Could you show the debug prints to see the mmc command / responses?
> Ideally for anything in mmc/core

Will something like:

# alias ddcmd='echo $* > /proc/dynamic_debug/control'
# ddcmd 'module mmc_core +p'
# ddcmd 'module rtsx_pci_sdmmc +p'
# mmc status get /dev/mmcblk0
# dmesg | grep -E 'mmc_core|rtsx_pci_sdmmc'

suffice?

Regards,
Dominik
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