linux-kernel - Re: [PATCH V2] mmc: sdhci-pci-gli: GL975[05]: Mask the replay timer timeout of AER

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Message-ID: <CAAd53p5Q5-RVHWytst7=tCNW+A+Sc_swAgUQemQLF27CLbH7+A@mail.gmail.com>
Date:   Mon, 6 Nov 2023 14:45:18 +0200
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Adrian Hunter <adrian.hunter@...el.com>
Cc:     Victor Shih <victorshihgli@...il.com>, ulf.hansson@...aro.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        benchuanggli@...il.com, HL.Liu@...esyslogic.com.tw,
        Greg.tu@...esyslogic.com.tw, SeanHY.Chen@...esyslogic.com.tw,
        Victor Shih <victor.shih@...esyslogic.com.tw>
Subject: Re: [PATCH V2] mmc: sdhci-pci-gli: GL975[05]: Mask the replay timer
 timeout of AER

On Mon, Nov 6, 2023 at 11:29 AM Adrian Hunter <adrian.hunter@...el.com> wrote:
>
> On 18/10/23 13:33, Victor Shih wrote:
> > From: Victor Shih <victor.shih@...esyslogic.com.tw>
> >
> > Due to a flaw in the hardware design, the GL975x replay timer frequently
> > times out when ASPM is enabled. As a result, the warning messages that will
> > often appear in the system log when the system accesses the GL975x
> > PCI config. Therefore, the replay timer timeout must be masked.
> >
> > Signed-off-by: Victor Shih <victor.shih@...esyslogic.com.tw>
>
> Acked-by: Adrian Hunter <adrian.hunter@...el.com>

Acked-by: Kai-Heng Feng <kai.heng.feng@...onical.com>

I'll send another patch to address the issue I am seeing.

Kai-Heng

>
> > ---
> >
> > Updates in V2:
> >  - Modify the commit message.
> >
> > ---
> >
> >  drivers/mmc/host/sdhci-pci-gli.c | 16 ++++++++++++++++
> >  1 file changed, 16 insertions(+)
> >
> > diff --git a/drivers/mmc/host/sdhci-pci-gli.c b/drivers/mmc/host/sdhci-pci-gli.c
> > index d83261e857a5..d8a991b349a8 100644
> > --- a/drivers/mmc/host/sdhci-pci-gli.c
> > +++ b/drivers/mmc/host/sdhci-pci-gli.c
> > @@ -28,6 +28,9 @@
> >  #define PCI_GLI_9750_PM_CTRL 0xFC
> >  #define   PCI_GLI_9750_PM_STATE        GENMASK(1, 0)
> >
> > +#define PCI_GLI_9750_CORRERR_MASK                            0x214
> > +#define   PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT       BIT(12)
> > +
> >  #define SDHCI_GLI_9750_CFG2          0x848
> >  #define   SDHCI_GLI_9750_CFG2_L1DLY    GENMASK(28, 24)
> >  #define   GLI_9750_CFG2_L1DLY_VALUE    0x1F
> > @@ -152,6 +155,9 @@
> >  #define PCI_GLI_9755_PM_CTRL     0xFC
> >  #define   PCI_GLI_9755_PM_STATE    GENMASK(1, 0)
> >
> > +#define PCI_GLI_9755_CORRERR_MASK                            0x214
> > +#define   PCI_GLI_9755_CORRERR_MASK_REPLAY_TIMER_TIMEOUT       BIT(12)
> > +
> >  #define SDHCI_GLI_9767_GM_BURST_SIZE                 0x510
> >  #define   SDHCI_GLI_9767_GM_BURST_SIZE_AXI_ALWAYS_SET          BIT(8)
> >
> > @@ -561,6 +567,11 @@ static void gl9750_hw_setting(struct sdhci_host *host)
> >       value &= ~PCI_GLI_9750_PM_STATE;
> >       pci_write_config_dword(pdev, PCI_GLI_9750_PM_CTRL, value);
> >
> > +     /* mask the replay timer timeout of AER */
> > +     pci_read_config_dword(pdev, PCI_GLI_9750_CORRERR_MASK, &value);
> > +     value |= PCI_GLI_9750_CORRERR_MASK_REPLAY_TIMER_TIMEOUT;
> > +     pci_write_config_dword(pdev, PCI_GLI_9750_CORRERR_MASK, value);
> > +
> >       gl9750_wt_off(host);
> >  }
> >
> > @@ -770,6 +781,11 @@ static void gl9755_hw_setting(struct sdhci_pci_slot *slot)
> >       value &= ~PCI_GLI_9755_PM_STATE;
> >       pci_write_config_dword(pdev, PCI_GLI_9755_PM_CTRL, value);
> >
> > +     /* mask the replay timer timeout of AER */
> > +     pci_read_config_dword(pdev, PCI_GLI_9755_CORRERR_MASK, &value);
> > +     value |= PCI_GLI_9755_CORRERR_MASK_REPLAY_TIMER_TIMEOUT;
> > +     pci_write_config_dword(pdev, PCI_GLI_9755_CORRERR_MASK, value);
> > +
> >       gl9755_wt_off(pdev);
> >  }
> >
>