From mboxrd@z Thu Jan  1 00:00:00 1970
From: Eric =?ISO-8859-1?B?QuluYXJk?= <eric@eukrea.com>
Subject: Re: [MX25][MMC] mmc esdhc failure in 3.3
Date: Tue, 27 Mar 2012 10:58:19 +0200
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To: joancarles <joancarles@fqingenieria.es>
Cc: Zhu Richard-R65037 <r65037@freescale.com>, shawn.guo@linaro.org, linux-mmc@vger.kernel.org, Wolfram Sang <w.sang@pengutronix.de>, linux-arm-kernel@lists.infradead.org

Hi Joan Carles,

Le Tue, 27 Mar 2012 10:46:45 +0200,
joancarles <joancarles@fqingenieria.es> a =E9crit :
> >> This is still present, and we have absolutely no idea where to=20
> >> continue
> >> searching for the solution of the problem. Any pointers? Any git=20
> >> trees
> >> of mmc driver changes we could try? Anybody else with a MX25 that=20
> >> has
> >> this issue?
> >>
> > does that attached patch fix your problem ?
>=20
> YES, indeed it does to a certain degree. The timeout errors do not=20
> occur anymore and I can successfully perform many fs->ops, such as RE=
AD,=20
> WRITE, UNLINK ... . So thank you very much for this insight through y=
our=20
> patch!
>=20
> The speed of the card is excruciatingly slow, however. We roughly get=
=20
> between 34KB/s and 64KB/s from a dd if=3D/dev/zero write to any of th=
e=20
> following partitions:
>=20
I have the same speed problem here on i.MX25 but still haven't found
the reason.
Shawn, Richard : do you have an idea of why the eSDHC is so slow on
i.MX25 ?

Thanks,
Eric