Re: [PATCH V1] mmc: sdhci-msm: Clear tuning done flag while hs400 tuning

[Veerabhadrarao Badiganti]

On 5/29/2020 4:05 PM, Ulf Hansson wrote:
> On Thu, 28 May 2020 at 17:14, Veerabhadrarao Badiganti
> <vbadigan@xxxxxxxxxxxxxx> wrote:
> > Clear tuning_done flag while executing tuning to ensure vendor
> > specific HS400 settings are applied properly when the controller
> > is re-initialized in HS400 mode.
> >
> > Without this, re-initialization of the qcom SDHC in HS400 mode fails
> > while resuming the driver from runtime-suspend or system-suspend.
> >
> > Fixes: ff06ce4 ("mmc: sdhci-msm: Add HS400 platform support")
> > Cc: stable@xxxxxxxxxxxxxxx
> > Signed-off-by: Veerabhadrarao Badiganti <vbadigan@xxxxxxxxxxxxxx>
> Applied for next, thanks!
>
> Kind regards
> Uffe
Thanks Ulf.
I see a mail on this patch, that SHA in the commit text should be 12 digit.
Let me know if i have to re-post this patch by correcting it.
> > ---
> >   drivers/mmc/host/sdhci-msm.c | 6 ++++++
> >   1 file changed, 6 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> > index 95cd973..b277dd7 100644
> > --- a/drivers/mmc/host/sdhci-msm.c
> > +++ b/drivers/mmc/host/sdhci-msm.c
> > @@ -1174,6 +1174,12 @@ static int sdhci_msm_execute_tuning(struct mmc_host *mmc, u32 opcode)
> >          msm_host->use_cdr = true;
> >
> >          /*
> > +        * Clear tuning_done flag before tuning to ensure proper
> > +        * HS400 settings.
> > +        */
> > +       msm_host->tuning_done = 0;
> > +
> > +       /*
> >           * For HS400 tuning in HS200 timing requires:
> >           * - select MCLK/2 in VENDOR_SPEC
> >           * - program MCLK to 400MHz (or nearest supported) in GCC
> > --
> > Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project