Re: Radxa ROCK 5T: SD card startup failure

[Ahmad Fatoum <a.fatoum@pengutronix.de>]

Hello Michael,

On 1/9/26 4:10 PM, Michael Tretter wrote:
> It seems to me that the SD host controller fails to correctly initialize
> if the card detect it directly muxed as GPIO instead of muxing it to the
> SD host controller. At least that's what I understand from
> https://lore.kernel.org/linux-rockchip/4920950.GXAFRqVoOG@diego/.
> 
> May there be some configuration in the SD host controller that needs to
> be changed to ignore the card detect?

The driver didn't clear the card-detect bit in DWMCI_RINTSTS, which may
be the culprit.

Could you please give the potential fix at [1] a test?

If this doesn't resolve the issue, we will have to do revert the DT
change in arch/arm/dts before v2026.02.0.

[1]:
https://lore.barebox.org/barebox/20260209164045.1924618-1-a.fatoum@pengutronix.de/T/#u

Thanks,
Ahmad


> 
> Michael
> 
> 

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