[PATCH v2] mmc: sdhci: Fix HISPD bit handling

[Jagan Teki]

On Tue, Jun 9, 2020 at 8:08 PM Robin Murphy <robin.murphy at arm.com> wrote:
>
> On 2020-06-09 15:01, Jagan Teki wrote:
> > SDHCI HISPD bits need to be configured based on desired mmc
> > timings mode and some HISPD quirks.
> >
> > So, handle the HISPD bit based on the mmc computed selected
> > mode(timing parameter) rather than fixed mmc card clock
> > frequency.
> >
> > Linux handle the HISPD similar like this in below commit,
> >
> > commit <501639bf2173> ("mmc: sdhci: fix SDHCI_QUIRK_NO_HISPD_BIT handling")
> >
> > This eventually fixed the mmc write issue observed in
> > rk3399 sdhci controller.
> >
> > Bug log for refernece,
> > => gpt write mmc 0 $partitions
> > Writing GPT: mmc write failed
> > ** Can't write to device 0 **
> > ** Can't write to device 0 **
> > error!
> >
> > Cc: Kever Yang <kever.yang at rock-chips.com>
> > Cc: Peng Fan <peng.fan at nxp.com>
> > Reviewed-by: Jaehoon Chung <jh80.chung at samsung.com>
> > Signed-off-by: Jagan Teki <jagan at amarulasolutions.com>
> > ---
> > Changes for v2:
> > - collect Jaehoon R-b
> >
> >   drivers/mmc/sdhci.c | 23 +++++++++++++++--------
> >   1 file changed, 15 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/mmc/sdhci.c b/drivers/mmc/sdhci.c
> > index 92cc8434af..280b8c88eb 100644
> > --- a/drivers/mmc/sdhci.c
> > +++ b/drivers/mmc/sdhci.c
> > @@ -594,14 +594,21 @@ static int sdhci_set_ios(struct mmc *mmc)
> >                       ctrl &= ~SDHCI_CTRL_4BITBUS;
> >       }
> >
> > -     if (mmc->clock > 26000000)
> > -             ctrl |= SDHCI_CTRL_HISPD;
> > -     else
> > -             ctrl &= ~SDHCI_CTRL_HISPD;
> > -
> > -     if ((host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) ||
> > -         (host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE))
> > -             ctrl &= ~SDHCI_CTRL_HISPD;
> > +     if (!(host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) ||
>
> Should that be "&&" rather than "||"? Otherwise this will always
> evaluate to true unless *both* quirks are set, which isn't equivalent to
> the check being removed above.

Correct, thanks for the catch. I have updated ib v3.

Jagan.