RE: [RFC/RFT PATCH] mmc: renesas_sdhi: add delay between tuning cmds

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Hi Adam,

> -----Original Message-----
> From: Adam Ford <aford173@xxxxxxxxx>
> Sent: Friday, June 16, 2023 3:35 PM
> To: Wolfram Sang <wsa+renesas@xxxxxxxxxxxxxxxxxxxx>; Adam Ford
> <aford173@xxxxxxxxx>; linux-mmc@xxxxxxxxxxxxxxx; linux-renesas-
> soc@xxxxxxxxxxxxxxx; Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> Subject: Re: [RFC/RFT PATCH] mmc: renesas_sdhi: add delay between tuning
> cmds
> 
> On Wed, May 31, 2023 at 12:45 PM Wolfram Sang <wsa+renesas@sang-
> engineering.com> wrote:
> >
> >
> > > I am testing this on a 5.10 kernel based on the Renesas RZ linux
> > > kernel branch.  The good news is that the card doesn't hang like it
> > > used to on the older 4.19 kernel, but it still does not enumerate to
> > > SDR104 speeds.
> >
> > U-Boot has a 1ms delay. Could you increase the delay to 1ms, please?
> 
> Sorry for the delay, but I increased this to  usleep_range(1000, 2500) and
> it still hangs.
> 
> I don't know if the issue is dependent on the variant.  For what it's
> worth, I am testing an RZ/G2M, but I can do the same thing on an RZ/G2N or
> RZ/G2H if you want.

I am doing 6.1.y testing[1] with all RZ board variants,
[1] https://git.kernel.org/pub/scm/linux/kernel/git/cip/linux-cip.git/log/?h=linux-6.1.y-cip

I have done SDHI testing with RZ/G2M 1.3 HiHope board and I didn't face this issue.

Can you please let me know how to reproduce this issue?

Cheers,
Biju




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