linux-kernel - Re: [PATCH] OMAP HSMMC: fix MMC3 dma

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Message-ID: <20090127171306.GC32148@atomide.com>
Date:	Tue, 27 Jan 2009 09:13:09 -0800
From:	Tony Lindgren <tony@...mide.com>
To:	Grazvydas Ignotas <notasas@...il.com>
Cc:	Adrian Hunter <ext-adrian.hunter@...ia.com>,
	"drzeus-mmc@...eus.cx" <drzeus-mmc@...eus.cx>,
	"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Jarkko Lavinen (NMP/Helsinki)" <jarkko.lavinen@...ia.com>
Subject: Re: [PATCH] OMAP HSMMC: fix MMC3 dma

* Grazvydas Ignotas <notasas@...il.com> [090127 09:00]:
> On Tue, Jan 27, 2009 at 2:02 PM, Adrian Hunter
> <ext-adrian.hunter@...ia.com> wrote:
> > Grazvydas Ignotas wrote:
> >>
> >> Data transfers on third OMAP3 MMC controller don't work
> >> because DMA line numbers are only defined for MMC1 and MMC2.
> >> Fix that and store line numbers in mmc_omap_host structure
> >> to reduce code size.
> >> Tested on OMAP3 pandora board.
> >>
> >> Signed-off-by: Grazvydas Ignotas <notasas@...il.com>
> >> ---
> >>  drivers/mmc/host/omap_hsmmc.c |   31 +++++++++++++++++++++++--------
> >>  1 files changed, 23 insertions(+), 8 deletions(-)
> >>
> >
> > Have you considered using the scatter-gather emulation patch:
> >
> >        http://marc.info/?l=linux-omap&m=122726069922195&w=2
> >
> > It was reverted:
> >
> >        http://marc.info/?l=linux-omap&m=122904725322787&w=2
> >
> > because of a hardware problem with OMAP3430 before ES3.0, but applying:
> >
> >
> >  http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=6a79e391df295bd7c2aa1309ea5031f361c197fd
> >
> > seems to overcome even that.
> 
> Hmm, but it still doesn't know about MMC3. But in case that SG patch
> goes first, I can resend.

On related news, looks like the hsmmc.c has finally hit the mainline
tree!

Tony
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