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

["Christian Löhle" <CLoehle@hyperstone.com>]

Looks ok to me but haven't tried it yet, I would be especially looking for e.g. mmc_request_done log, I would expect at least a mmc_command structure shown there there with
Opcode 13 and some resp[0,1,2,3] values. If you see that than I'd say that is good.

-----Original Message-----
From: Dominik 'Rathann' Mierzejewski <dominik@greysector.net> 
Sent: Dienstag, 4. April 2023 12:09
To: linux-mmc@vger.kernel.org
Subject: Re: mmc-utils: ioctl connection timed out with SD cards

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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