Hi Eric: I'm on my business trip out of my FSL office, can't reproduce this issue on i.MX25 board now. Sorry about that. Best Regards Richard Zhu -----Original Message----- From: Eric Bénard [mailto:eric@xxxxxxxxxx] Sent: 2012年3月27日 3:58 To: joancarles Cc: Zhu Richard-R65037; shawn.guo@xxxxxxxxxx; linux-mmc@xxxxxxxxxxxxxxx; Wolfram Sang; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx Subject: Re: [MX25][MMC] mmc esdhc failure in 3.3 Hi Joan Carles, Le Tue, 27 Mar 2012 10:46:45 +0200, joancarles <joancarles@xxxxxxxxxxxxxxx> 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 ?韬{.n?????%??檩??w?{.n???{炳i?)?骅w* jg????????G??⒏ ⒎?:+v???????? ????＂??????
