[PATCH 1/2] mmc: core: enable CMD19 tuning for DDR50 mode

[Ulf Hansson]

[...]

>>
>> Also, I was giving this a second thought...
>>
>> What happens with the SD 3.0 card when it *doesn't* support CMD19.
>> Will it still be functional afterwards or will it move from "transfer
>> state" to another not known state?
>
> uffe, i am not the expert of this issue but weijun is. weijun told that
> for the cards who don't support cmd19, it will take it as illegal
> command and not response it. and it also sets illegal command error in
> registers.
> but the card status is still functional and doesn't cause unknown state.
>
> so maybe we can just ignore the err of tuning, and use the second
> patch with the refine you mentioned?

Sure, let's do that. Please send a v2 of the patchset then.

Kind regards
Uffe