From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 9/9] mx23: Use PIO mode support for MMC
Date: Wed, 23 Jan 2013 12:26:58 +0100 [thread overview]
Message-ID: <201301231226.58545.marex@denx.de> (raw)
In-Reply-To: <CAP9ODKrSNV++6WoNJiZ4ghckTtWXtO64HoQ36RbPFj8C78soDA@mail.gmail.com>
Dear Otavio Salvador,
> On Wed, Jan 23, 2013 at 7:04 AM, Stefano Babic <sbabic@denx.de> wrote:
> > On 22/01/2013 02:56, Otavio Salvador wrote:
> >> On Mon, Jan 21, 2013 at 11:50 PM, Marek Vasut <marex@denx.de> wrote:
> >>> Dear Otavio Salvador,
> >>>
> >>> NAK. DMA works on MX28 and works in Linux on MX23, therefore the DMA is
> >>> not broken on either. Thus there's no reason to introduce such
> >>> "force_pio" stuff.
> >>
> >> Lack of time to work on it is one reason. I won't be able to work on
> >> it for some days and I prefer a working solution than skip it for
> >> another release.
> >>
> >> --
> >> Otavio Salvador O.S. Systems
> >> E-mail: otavio at ossystems.com.br http://www.ossystems.com.br
> >> Mobile: +55 53 9981-7854 http://projetos.ossystems.com.br
> >
> > Hi Otavio, hi Marek,
> >
> > let me say some words about this discussion. I agree that if there is no
> > support for DMA for MX23, we could add support with PIO mode. However,
> > there should be a very good reason, because as far as I understand,
> > added support for DMA is valid for mxs platform. The solution introduced
> > with this patchset lets also the door open for people that can use MX28
> > in PIO mode. I think (I have already seen in ML Marek's patchset for it)
> > the way to fix DMA for mx23 and then add support for MMC is the rught
> > way to do.
>
> So you'd like to have this patch ported to Marek's patchset so the
> support for PIO mode is kept available? Instead of enabling it for
> MX23 we can have a config option which allows force PIO mode and
> disable DMA. This is what you want?
Forcing PIO is nonsense, why would it be of any use?
Best regards,
Marek Vasut
next prev parent reply other threads:[~2013-01-23 11:26 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-01-22 1:47 [U-Boot] [PATCH 0/9] iMX23 MMC support and environment addition Otavio Salvador
2013-01-22 1:47 ` [U-Boot] [PATCH 1/9] mx23: Add SSP registers map Otavio Salvador
2013-01-22 1:47 ` [U-Boot] [PATCH 2/9] mx23: Use XFER_COUNT field in HW_SSP_CTRL0 register in MMC PIO mode Otavio Salvador
2013-01-22 1:45 ` Marek Vasut
2013-01-22 1:53 ` Otavio Salvador
2013-01-22 2:01 ` Marek Vasut
2013-01-22 1:47 ` [U-Boot] [PATCH 3/9] mx23: Fix transfer size setting for SPI Otavio Salvador
2013-01-22 1:46 ` Marek Vasut
2013-01-22 1:55 ` Otavio Salvador
2013-01-22 2:00 ` Marek Vasut
2013-01-24 18:14 ` Marek Vasut
2013-01-22 1:47 ` [U-Boot] [PATCH 4/9] mx23evk: Add initial board support Otavio Salvador
2013-01-22 1:46 ` Marek Vasut
2013-01-22 2:02 ` Otavio Salvador
2013-01-22 2:16 ` Marek Vasut
2013-01-22 2:30 ` Fabio Estevam
2013-01-22 2:42 ` Marek Vasut
2013-01-22 10:05 ` Otavio Salvador
2013-01-22 1:47 ` [U-Boot] [PATCH 5/9] mx23_olinuxino: Add MMC support Otavio Salvador
2013-01-22 1:47 ` Marek Vasut
2013-01-22 1:58 ` Otavio Salvador
2013-01-22 1:47 ` [U-Boot] [PATCH 6/9] mx23_olinuxino: Skip MMC Card detection Otavio Salvador
2013-01-22 1:48 ` Marek Vasut
2013-01-22 1:58 ` Otavio Salvador
2013-01-22 1:59 ` Marek Vasut
2013-01-22 1:47 ` [U-Boot] [PATCH 7/9] mx23_olinuxino: Add default environment Otavio Salvador
2013-01-22 1:49 ` Marek Vasut
2013-01-22 2:00 ` Otavio Salvador
2013-01-22 2:34 ` Fabio Estevam
2013-01-22 1:47 ` [U-Boot] [PATCH 8/9] mxs: Fix MMC reset to avoid write errors and timeout in iMX23 Otavio Salvador
2013-01-22 1:49 ` Marek Vasut
2013-01-22 2:03 ` Otavio Salvador
2013-01-22 2:15 ` Marek Vasut
2013-01-22 1:47 ` [U-Boot] [PATCH 9/9] mx23: Use PIO mode support for MMC Otavio Salvador
2013-01-22 1:50 ` Marek Vasut
2013-01-22 1:56 ` Otavio Salvador
2013-01-22 1:59 ` Marek Vasut
2013-01-23 9:04 ` Stefano Babic
2013-01-23 11:05 ` Otavio Salvador
2013-01-23 11:26 ` Marek Vasut [this message]
2013-01-23 11:39 ` Stefano Babic
2013-01-23 11:48 ` Marek Vasut
2013-01-23 12:12 ` Otavio Salvador
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