From: "Eric Bénard" <eric@eukrea.com>
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
Subject: Re: [MX25][MMC] mmc esdhc failure in 3.3
Date: Tue, 27 Mar 2012 10:58:19 +0200 [thread overview]
Message-ID: <20120327105819.00d89783@eb-e6520> (raw)
In-Reply-To: <ac05d6e5c1ce4bf9cfc5c28d235f866f@mail.fqingenieria.es>
Hi Joan Carles,
Le Tue, 27 Mar 2012 10:46:45 +0200,
joancarles <joancarles@fqingenieria.es> a écrit :
> >> This is still present, and we have absolutely no idea where to
> >> continue
> >> searching for the solution of the problem. Any pointers? Any git
> >> trees
> >> of mmc driver changes we could try? Anybody else with a MX25 that
> >> has
> >> this issue?
> >>
> > does that attached patch fix your problem ?
>
> YES, indeed it does to a certain degree. The timeout errors do not
> occur anymore and I can successfully perform many fs->ops, such as READ,
> WRITE, UNLINK ... . So thank you very much for this insight through your
> patch!
>
> The speed of the card is excruciatingly slow, however. We roughly get
> between 34KB/s and 64KB/s from a dd if=/dev/zero write to any of the
> following partitions:
>
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
next prev parent reply other threads:[~2012-03-27 8:58 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-03-06 11:29 [MX25][MMC] mmc esdhc failure in 3.3-rc5 joancarles
2012-03-12 13:12 ` [MX25][MMC] mmc esdhc failure in 3.3-rc5 (still present in rc7) joancarles
2012-03-12 13:24 ` [MX25][MMC] mmc esdhc failure in 3.3-rc5 Wolfram Sang
2012-03-12 14:50 ` joancarles
2012-03-12 21:45 ` Wolfram Sang
2012-03-13 11:20 ` joancarles
2012-03-13 5:55 ` Zhu Richard-R65037
2012-03-16 15:03 ` joancarles
2012-03-27 7:32 ` [MX25][MMC] mmc esdhc failure in 3.3 joancarles
2012-03-27 7:59 ` joancarles
2012-03-27 8:12 ` Eric Bénard
2012-03-27 8:46 ` joancarles
2012-03-27 8:58 ` Eric Bénard [this message]
2012-03-27 13:03 ` Zhu Richard-R65037
2012-03-27 9:01 ` Wolfram Sang
2012-03-27 9:06 ` Eric Bénard
2012-03-27 9:14 ` Wolfram Sang
2012-03-27 9:23 ` Eric Bénard
2012-03-27 9:36 ` Wolfram Sang
2012-03-27 9:33 ` joancarles
2012-03-27 9:40 ` Eric Bénard
2012-03-27 10:56 ` joancarles
2012-03-28 9:26 ` joancarles
2012-03-28 14:01 ` joancarles
2012-03-27 9:45 ` Wolfram Sang
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