Re: [SeaBIOS] Failure to detect high-capacity SD card

[Kevin O'Connor]

On Fri, Aug 24, 2018 at 09:01:03AM -0400, Chris wrote:
> I know it has been months but I just had an idea that seems to fix
> this issue. I still need to test for some time to make sure but so far
> it is working fine.
>
> What I did is simply add a delay before the SD card is initialized.
> The attached patch takes a brute force approach and will attempt to
> initialize multiple times. However, so far it has never had to attempt
> the initialize more than once.
>
> That little "msleep(5)" before setting up the card seems to be all
> that is needed. Like I said though, still testing but looking good.

Interesting.  Can you test if it is the msleep() that is needed, or if
it is the second initialization that is needed?  (Or both?)

Thanks,
-Kevin

Failure to detect high-capacity SD card

[Chris]

On Fri, Aug 24, 2018 at 9:13 AM, Kevin O'Connor  wrote:
> On Fri, Aug 24, 2018 at 09:01:03AM -0400, Chris wrote:
> > I know it has been months but I just had an idea that seems to fix
> > this issue. I still need to test for some time to make sure but so far
> > it is working fine.
> >
> > What I did is simply add a delay before the SD card is initialized.
> > The attached patch takes a brute force approach and will attempt to
> > initialize multiple times. However, so far it has never had to attempt
> > the initialize more than once.
> >
> > That little "msleep(5)" before setting up the card seems to be all
> > that is needed. Like I said though, still testing but looking good.
>
> Interesting.  Can you test if it is the msleep() that is needed, or if
> it is the second initialization that is needed?  (Or both?)
>
> Thanks,
> -Kevin

So far it has worked on the first attempt every time. So it needs only
the delay and nothing else.

I still need to test with all my SD cards. Though I only have a 64GB
Sandisk and a handful of 32GB Samsung. The question is whether or not
the delay is dependent on the card type or if it's just the controller
that needs to stabilize.

Chris