Re: [RFC PATCH V2 2/2] mmc: allow card to disable tuning

[Adrian Hunter]

On 18/02/25 20:41, Erick Shepherd wrote:
> Sorry about that, the context for this change is that I have been
> working with a DDR50 swissbit SD card that does not support tuning.
> The case I'm seeing is that the first tuning times out and any
> further tuning attempts cause an async page read I/O error. I used
> this change to prevent the card from attempting to tune again if it
> is ever reset in the case where we know tuning isn't supported.

Sorry for the slow reply.

I would expect if there was a general problem with DDR50 SD cards,
it would have come to light before now.

Does the card work with any other host controllers with linux?

If it is specific to a particular kind of card, a card quirk
could be added, say MMC_QUIRK_BROKEN_DDR50_TUNING