Re: [PATCH v3 3/13] mmc: sunxi: Always set signal delay to 0 for A64

From	Maxime Ripard <maxime.ripard@free-electrons.com>
Newsgroups	linux.kernel
Subject	Re: [PATCH v3 3/13] mmc: sunxi: Always set signal delay to 0 for A64
Date	2017-01-25 10:20 +0100
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Hi Ulf,

On Tue, Jan 24, 2017 at 09:16:12AM +0100, Ulf Hansson wrote:
> On 16 January 2017 at 17:56, Maxime Ripard
> <maxime.ripard@free-electrons.com> wrote:
> > Experience have shown that the using the  autocalibration could severely
> > degrade the performances of the MMC bus.
> >
> > Allwinner is using in its BSP a delay set to 0 for all the modes but HS400.
> > Remove the calibration code for now, and add comments to document our
> > findings.
> 
> So doesn't this break some platforms using HS400? Or are you saying
> those are already broken?

Like Andre said, HS400 isn't supported at all, so there's no
regression or brokenness involved :)

Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux and Kernel engineering
http://free-electrons.com

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Re: [PATCH v3 3/13] mmc: sunxi: Always set signal delay to 0 for A64 Ulf Hansson <ulf.hansson@linaro.org> - 2017-01-24 09:20 +0100
  Re: [PATCH v3 3/13] mmc: sunxi: Always set signal delay to 0 for A64 Andre Przywara <andre.przywara@arm.com> - 2017-01-24 10:20 +0100
  Re: [PATCH v3 3/13] mmc: sunxi: Always set signal delay to 0 for A64 Maxime Ripard <maxime.ripard@free-electrons.com> - 2017-01-25 10:20 +0100

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