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Date: Tue, 12 Dec 2017 19:23:27 +0100
From: Miquel RAYNAL <miquel.raynal@free-electrons.com>
To: Sean =?UTF-8?B?Tnlla2rDpnI=?= <sean.nyekjaer@prevas.dk>
Cc: ezequiel.garcia@free-electrons.com, linux-mtd@lists.infradead.org,
 "Kasper Revsbech (KREV)" <krev@triax.com>, Boris Brezillon
 <Boris.Brezillon@free-electrons.com>
Subject: Re: [BUG] pxa3xx: wait time out when scanning for bb
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On Tue, 12 Dec 2017 19:10:10 +0100
Sean Nyekj=C3=A6r <sean.nyekjaer@prevas.dk> wrote:

> Hi Miquel
> > =20
> >> Without kernel bbt (nand scrubbed in uboot just before boot): =20
> >
> >[...]
> > =20
> >> Block size 131072, page size 2048, OOB size 64
> >> Dumping data starting at 0x0fec0000 and ending at 0x0fec0800... =20
> >
> >[...]
> > =20
> >>  =C2=A0 OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
> >>  =C2=A0 OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
> >>  =C2=A0 OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
> >>  =C2=A0 OOB Data: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff =20
> >
> >As you can see, your U-Boot version does not recreate the BBT
> >automatically as I told you it should. Please try rebooting the board
> >after scrubbing and then check U-Boot creates the BBT from U-Boot
> >command line. =20
>=20
> My uboot is recreating the bbt, I have been scrubbing it just before
> running the bootcmd that's why the OOB is empty :-) I thought that
> was what you needed but I guess I was wrong.
>=20
> >
> >I insist on the fact that this is something I could have spotted
> >earlier
> >if you had blindlessly copy/pasted the *entire* trace, I don't
> >mind if it is big, it can be really interesting for others to get the
> >full trace.
> >
> >This time I only need the trace without the "on-flash-bbt"
> >property. =20
>=20
> I see what you want now, you want me to dump what uboot is writing in
> the bbt and what the new driver is writing :-) Correct?

Correct :)

You already gave me what the driver writes (without ECC, but it does
not matter, we know the ECC engine will be used in regular conditions),
what I seek now is effectively what U-Boot is writing to understand
where  the mismatch is.

> I'm sending some tracing the first thing tomorrow.

Nice!

Thanks,
Miqu=C3=A8l