From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marek Vasut <marex@denx.de>
Date: Mon, 9 Apr 2012 21:02:15 +0200
Subject: [U-Boot] [PATCH] i.MX28: Lower the amount of blocks transfered
	in one DMA cycle
In-Reply-To: <CAOMZO5CZATfBn7NCThteEwJau4gvrZ=DQA+yBnhbS5E5vFCUPw@mail.gmail.com>
References: <1333947018-28037-1-git-send-email-marex@denx.de>
	<CAOMZO5CZATfBn7NCThteEwJau4gvrZ=DQA+yBnhbS5E5vFCUPw@mail.gmail.com>
Message-ID: <201204092102.15643.marex@denx.de>
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To: u-boot@lists.denx.de

Dear Fabio Estevam,

> Hi Marek,
> 
> On 4/9/12, Marek Vasut <marex@denx.de> wrote:
> > Some MMC cards, like my ancient 32.0MB SanDisk RS-MMC cards had issue if
> > b_max
> > was set to 0x40 and DMA was enabled. Lower this value to 0x20, which
> > allows these cards to work too.
> 
> I know this is off topic here, but I am wondering whether the mxs mmc
> driver in the kernel is able to handle this card correctly or not.

Linux does, but I think there must be some limit to multiblock transfers there, 
otherwise it'd fail too.

> Regards,
> 
> Fabio Estevam

Best regards,
Marek Vasut