linux-kernel - Re: [PATCH] mmc: sdhci-pci-core: Disable cqe for ASUS 1100FK family devices

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Message-ID: <925b6e37-051f-927c-350a-cd767d88d72b@intel.com>
Date:   Tue, 13 Sep 2022 09:34:24 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Patrick Thompson <ptf@...gle.com>,
        Linux MMC development <linux-mmc@...r.kernel.org>
Cc:     Sangwhan Moon <sxm@...gle.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] mmc: sdhci-pci-core: Disable cqe for ASUS 1100FK family
 devices

On 13/09/22 00:28, Patrick Thompson wrote:
> From: ptf <ptf@...gle.com>
> 
> The CQE implementation for the eMMC in the ASUS 1100FK family of devices
> is broken. This causes installations to fail and thus we are disabling
> CQE for this family of devices.
> 
> Signed-off-by: Patrick Thompson <ptf@...gle.com>

Acked-by: Adrian Hunter <adrian.hunter@...el.com>

> ---
> 
> Hello,
> 
> I was hoping to get some advice on adapting this patch to target the
> eMMC directly instead of a family of laptops. One idea is to use the
> PCI-id of the controller (in this case [8086:4dc4]). Would that make
> sense? Is there someone with more knowledge on the subject that could
> confirm that the [8086:4dc4] device doesn't have a working CQE?

In these cases the issue is suspected to be BIOS. Best solution is to
disable CQE.

> 
> Thank you,
> Patrick
> 
> 
>  drivers/mmc/host/sdhci-pci-core.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/mmc/host/sdhci-pci-core.c b/drivers/mmc/host/sdhci-pci-core.c
> index 622b7de96c7f..3ba0250559e7 100644
> --- a/drivers/mmc/host/sdhci-pci-core.c
> +++ b/drivers/mmc/host/sdhci-pci-core.c
> @@ -890,7 +890,8 @@ static bool glk_broken_cqhci(struct sdhci_pci_slot *slot)
>  {
>  	return slot->chip->pdev->device == PCI_DEVICE_ID_INTEL_GLK_EMMC &&
>  	       (dmi_match(DMI_BIOS_VENDOR, "LENOVO") ||
> -		dmi_match(DMI_SYS_VENDOR, "IRBIS"));
> +		dmi_match(DMI_SYS_VENDOR, "IRBIS") ||
> +		dmi_match(DMI_PRODUCT_FAMILY, "ASUS BR1100FKA"));
>  }
>  
>  static int glk_emmc_probe_slot(struct sdhci_pci_slot *slot)