[PATCH] mmc: xenon_sdhci: remove wait_dat0 SDHCI OP

[Tom Rini]

On Tue, Mar 15, 2022 at 10:47:57AM +0100, Robert Marko wrote:
> On Mon, Mar 14, 2022 at 2:10 PM Tom Rini <trini at konsulko.com> wrote:
> >
> > On Mon, Mar 14, 2022 at 06:37:02PM +0900, Jaehoon Chung wrote:
> > > On 3/12/22 03:14, Robert Marko wrote:
> > > > Generic SDHCI driver received support for checking the busy status by
> > > > polling the DAT[0] level instead of waiting for the worst MMC switch time.
> > > >
> > > > Unfortunately, it appears that this does not work for Xenon controllers
> > > > despite being a part of the standard SDHCI registers and the Armada 3720
> > > > datasheet itself telling that BIT(20) is useful for detecting the DAT[0]
> > > > busy signal.
> > > >
> > > > I have tried increasing the timeout value, but I have newer managed to
> > > > catch DAT_LEVEL bits change from 0 at all.
> > > >
> > > > This issue appears to hit most if not all SoC-s supported by Xenon driver,
> > > > at least A3720, A8040 and CN9130 have non working eMMC currently.
> > > >
> > > > So, until a better solution is found drop the wait_dat0 OP for Xenon.
> > > > I was able to only test it on A3720, but it should work for others as well.
> > > >
> > > > Fixes: 40e6f52454fc ("drivers: mmc: Add wait_dat0 support for sdhci driver")
> > > > Signed-off-by: Robert Marko <robert.marko at sartura.hr>
> > >
> > > Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
> >
> > Since this is a regression fix, will this be in the PR with the imx fix
> > as well?  Thanks!
> 
> Hi Tom,
> Was this question directed at me or?

Sorry, to Jaehoon or Peng.

-- 
Tom
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