linux-kernel - Re: [RESEND, PATCH] mmc: sdhci-pci-gli: Fix GL9763E runtime PM when the system resumes from suspend

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Message-ID: <CACT4zj9x34TV_cTTV37crgtMqLEd-=rHkKUmdi=FsJDy3xpeYA@mail.gmail.com>
Date:   Thu, 2 Jun 2022 14:46:29 +0800
From:   Ben Chuang <benchuanggli@...il.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        linux-mmc <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        greg.tu@...esyslogic.com.tw,
        Ben Chuang <ben.chuang@...esyslogic.com.tw>,
        SeanHY.Chen@...esyslogic.com.tw, jason.lai@...esyslogic.com.tw,
        victor.shih@...esyslogic.com.tw,
        kane.chen@...el.corp-partner.google.com
Subject: Re: [RESEND, PATCH] mmc: sdhci-pci-gli: Fix GL9763E runtime PM when
 the system resumes from suspend

On Tue, May 31, 2022 at 9:39 PM Ulf Hansson <ulf.hansson@...aro.org> wrote:
>
> On Fri, 20 May 2022 at 13:43, Ben Chuang <benchuanggli@...il.com> wrote:
> >
> > When the system resumes from suspend (S3 or S4), the power mode is
> > MMC_POWER_OFF. In this status, gl9763e_runtime_resume() should not enable
> > PLL. Add a condition to this function to enable PLL only when the power
> > mode is MMC_POWER_ON.
> >
> > Fixes: d607667bb8fa (mmc: sdhci-pci-gli: Add runtime PM for GL9763E)
> > Signed-off-by: Ben Chuang <benchuanggli@...il.com>
>
> Sorry for the delay, I have been out traveling. Unfortunately this
> didn't make it for v5.18, although I have queued it up for v5.19 and
> added a stable tag.
>
> Thanks and kind regards
> Uffe
>

It's ok. Thank you for the explanation.

Best regards,
Ben

>
> > ---
> > Hi,
> >
> > Sorry, resend this patch because typo two email addresses.
> > Sorry for Adrian and Kane.
> >
> > Best regards,
> > Ben
> > ---
> >  drivers/mmc/host/sdhci-pci-gli.c | 3 +++
> >  1 file changed, 3 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> > index d09728c37d03..d81e5dc90e15 100644
> > --- a/drivers/mmc/host/sdhci-pci-gli.c
> > +++ b/drivers/mmc/host/sdhci-pci-gli.c
> > @@ -972,6 +972,9 @@ static int gl9763e_runtime_resume(struct sdhci_pci_chip *chip)
> >         struct sdhci_host *host = slot->host;
> >         u16 clock;
> >
> > +       if (host->mmc->ios.power_mode != MMC_POWER_ON)
> > +               return 0;
> > +
> >         clock = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> >
> >         clock |= SDHCI_CLOCK_PLL_EN;
> > --
> > 2.36.0
> >