linux-kernel - Re: [PATCH V9 03/23] mmc: core: Announce successful insertion of an SD UHS-II card

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Message-ID: <CAK00qKCNyh6mtNwQLW-kH3WV=PB_eH7=b1YmK-0TCotb2hKK3A@mail.gmail.com>
Date:   Fri, 18 Aug 2023 17:58:15 +0800
From:   Victor Shih <victorshihgli@...il.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     adrian.hunter@...el.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, benchuanggli@...il.com,
        HL.Liu@...esyslogic.com.tw, Greg.tu@...esyslogic.com.tw,
        takahiro.akashi@...aro.org, dlunev@...omium.org,
        Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V9 03/23] mmc: core: Announce successful insertion of an
 SD UHS-II card

On Tue, Aug 8, 2023 at 6:25 PM Ulf Hansson <ulf.hansson@...aro.org> wrote:
>
> On Fri, 21 Jul 2023 at 12:14, Victor Shih <victorshihgli@...il.com> wrote:
> >
> > From: Victor Shih <victor.shih@...esyslogic.com.tw>
>
> Authorship?
>

Hi, Ulf

     I will update this  in the V10 version.

Thanks, Victor Shih

> >
> > Update in previous version:
>
> Please, drop the above.
>

Hi, Ulf

     I will update this  in the V10 version.

Thanks, Victor Shih

> > To inform the users about SD UHS-II cards, let's extend the print at card
> > insertion with a "UHS-II" substring. Within this change, it seems
> > reasonable to convert from using "ultra high speed" into "UHS-I speed", for
> > the UHS-I type, as it should makes it more clear.
> >
> > Note that, the new print for UHS-II cards doesn't include the actual
> > selected speed mode. Instead, this is going to be added from subsequent
> > change.
> >
> > Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
> > Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
> > ---
> >
> > Updates in V7:
> >  - Drop MMC_TIMING_SD_UHS2 in favor of MMC_TIMING_UHS2_SPEED_A in
> >    mmc_card_uhs2 function.
> >
> > Updates in V4:
> >  - Make mmc_card_uhs2() take struct mmc_host* as in-param.
> >
> > ---
> >
> >  drivers/mmc/core/bus.c  | 4 +++-
> >  drivers/mmc/core/host.h | 7 +++++++
> >  2 files changed, 10 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/mmc/core/bus.c b/drivers/mmc/core/bus.c
> > index cf32cf135781..d9a3b3d38d8b 100644
> > --- a/drivers/mmc/core/bus.c
> > +++ b/drivers/mmc/core/bus.c
> > @@ -341,7 +341,9 @@ int mmc_add_card(struct mmc_card *card)
> >         if (mmc_card_hs(card))
> >                 speed_mode = "high speed ";
> >         else if (mmc_card_uhs(card))
> > -               speed_mode = "ultra high speed ";
> > +               speed_mode = "UHS-I speed ";
> > +       else if (mmc_card_uhs2(card->host))
> > +               speed_mode = "UHS-II speed ";
> >         else if (mmc_card_ddr52(card))
> >                 speed_mode = "high speed DDR ";
> >         else if (mmc_card_hs200(card))
> > diff --git a/drivers/mmc/core/host.h b/drivers/mmc/core/host.h
> > index 48c4952512a5..9f6e5e31dfea 100644
> > --- a/drivers/mmc/core/host.h
> > +++ b/drivers/mmc/core/host.h
> > @@ -89,5 +89,12 @@ static inline bool mmc_card_sd_express(struct mmc_host *host)
> >                 host->ios.timing == MMC_TIMING_SD_EXP_1_2V;
> >  }
> >
> > +static inline bool mmc_card_uhs2(struct mmc_host *host)
> > +{
> > +       return host->ios.timing == MMC_TIMING_UHS2_SPEED_A ||
> > +              host->ios.timing == MMC_TIMING_UHS2_SPEED_A_HD ||
> > +              host->ios.timing == MMC_TIMING_UHS2_SPEED_B ||
> > +              host->ios.timing == MMC_TIMING_UHS2_SPEED_B_HD;
> > +}
> >  #endif
> >
>
> Kind regards
> Uffe