RE: [PATCH] mmc: sdhci-pci-gli: Fix GL9767 s0ix sleep blocking

[BenChuang[莊智量]]

> -----Original Message-----
> From: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Sent: Monday, May 25, 2026 1:26 PM
> To: Ashwin Gundarapu <linuxuser509@xxxxxxxxxxx>; BenChuang[莊智量] <Ben.Chuang@xxxxxxxxxxxxxxxxxxx>; Victor Shih
> <victor.shih@xxxxxxxxxxxxxxxxxxx>
> Cc: linux-kernel <linux-kernel@xxxxxxxxxxxxxxx>; linux-mmc <linux-mmc@xxxxxxxxxxxxxxx>
> Subject: Re: [PATCH] mmc: sdhci-pci-gli: Fix GL9767 s0ix sleep blocking
>
> + Ben and Victor
>
> On 22/05/2026 17:14, Ashwin Gundarapu wrote:
> > From 42b314da9b13f5aad38c7a58bc4191b08d6b2156 Mon Sep 17 00:00:00 2001
> > From: Ashwin Gundarapu <linuxuser509@xxxxxxxxxxx>
> > Date: Fri, 22 May 2026 19:39:12 +0530
> > Subject: [PATCH] mmc: sdhci-pci-gli: Fix GL9767 s0ix sleep blocking
> >
> > Add missing suspend callback for GL9767 chip. Without this, the
> > SD card reader remains active during system suspend, preventing
> > the CPU from entering low-power s0ix states.
> >
> > Use the same suspend function as GL9763e, which properly powers
> > down the device during suspend.
> >

Hi Ashwin,

Thanks for sharing this change.
This approach generally looks reasonable, but I have a few questions.

Could you help provide some additional context on which path may
cause the LPM negotiation to remain inactive on GL9767? It would
be helpful to better understand whether there might be any chip-specific
handling involved in the suspend flow.

GL9763E and GL9767 may have some differences, and the gl9763e_suspend
callback may not always directly apply to GL9767. I do have access to
a GL9767 device; however, it is likely on a different platform, so I
may not be able to verify this behavior under the same conditions.
Any additional details you could share would be greatly appreciated.

Before moving forward, could you please provide more information on
your validation? For example:
- Test platform
- Steps to reproduce the issue and verify the fix
- dmesg logs covering suspend/resume before and after this patch

> > Link: https://bugzilla.kernel.org/show_bug.cgi?id=21928
> > 4&data=05%7C02%7Cben.chuang%40genesyslogic.com.tw%7C01d5e14d468340b49b0808deba1e220e%7C4e753840bf6b40
> > a19645185818deeb52%7C0%7C0%7C639152835758567322%7CUnknown%7CTWFpbGZsb3d8eyJFbXB0eU1hcGkiOnRydWU
> > sIlYiOiIwLjAuMDAwMCIsIlAiOiJXaW4zMiIsIkFOIjoiTWFpbCIsIldUIjoyfQ%3D%3D%7C0%7C%7C%7C&sdata=0Ue1kdd9s7qbKyJ
> > fLkZlPuOWtZJWCnna0LTAmiG5lcg%3D&reserved=0
> > Signed-off-by: Ashwin Gundarapu <linuxuser509@xxxxxxxxxxx>
> > ---
> >  drivers/mmc/host/sdhci-pci-gli.c | 17 +++++++++--------
> >  1 file changed, 9 insertions(+), 8 deletions(-)
> >
> > diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> > index 6e4084407662..b6251cdde228 100644
> > --- a/drivers/mmc/host/sdhci-pci-gli.c
> > +++ b/drivers/mmc/host/sdhci-pci-gli.c
> > @@ -2121,13 +2121,14 @@ static const struct sdhci_ops sdhci_gl9767_ops = {
> >  };
> >
> >  const struct sdhci_pci_fixes sdhci_gl9767 = {
> > -   .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
> > -   .quirks2        = SDHCI_QUIRK2_BROKEN_DDR50,
> > -   .probe_slot     = gli_probe_slot_gl9767,
> > -   .add_host       = sdhci_pci_uhs2_add_host,
> > -   .remove_host    = sdhci_pci_uhs2_remove_host,
> > -   .ops            = &sdhci_gl9767_ops,
> > +        .quirks         = SDHCI_QUIRK_NO_ENDATTR_IN_NOPDESC,
> > +        .quirks2        = SDHCI_QUIRK2_BROKEN_DDR50,
> > +        .probe_slot     = gli_probe_slot_gl9767,
> > +        .add_host       = sdhci_pci_uhs2_add_host,
> > +        .remove_host    = sdhci_pci_uhs2_remove_host,
> > +        .ops            = &sdhci_gl9767_ops,
> >  #ifdef CONFIG_PM_SLEEP
> > -   .resume         = sdhci_pci_gli_resume,
> > +        .suspend        = gl9763e_suspend,
> > +        .resume         = sdhci_pci_gli_resume,
> >  #endif
> > -};
> > +};
> > \ No newline at end of file

There are some code style issues in this diff. Please make sure to
run scripts/checkpatch.pl when preparing future revisions.

Thanks,
Ben Chuang

ps: I've CCed benchuanggli@xxxxxxxxx to avoid the corporate
mail disclaimer.

> > --
> > 2.43.0
> >
> >

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