linux-kernel - Re: [PATCH] mmc: sdhci-msm: Enable restore_dll

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Message-ID: <CAPDyKFqYD9WFTo4Qp0kvzZrOM0MNvY=krb3H_m6iAp=AGiRn+A@mail.gmail.com>
Date:   Fri, 28 Aug 2020 10:51:23 +0200
From:   Ulf Hansson <ulf.hansson@...aro.org>
To:     Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Doug Anderson <dianders@...omium.org>,
        "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>
Subject: Re: [PATCH] mmc: sdhci-msm: Enable restore_dll_config flag for sc7180 target

On Thu, 27 Aug 2020 at 17:22, Veerabhadrarao Badiganti
<vbadigan@...eaurora.org> wrote:
>
> On sc7180 target, issues are observed with HS400 mode due to a
> hardware limitation. If sdcc clock is dynamically gated and ungated,
> the very next command is failing with command CRC/timeout errors.
>
> To mitigate this issue, DLL phase has to be restored whenever sdcc
> clock is gated dynamically. The restore_dll_config ensures this.
> Enabling this flag with this change. And simply re-using the sdm845
> target configuration for this flag.
>
> Signed-off-by: Veerabhadrarao Badiganti <vbadigan@...eaurora.org>

Applied for next, thanks!

Kind regards
Uffe

> ---
>  drivers/mmc/host/sdhci-msm.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/mmc/host/sdhci-msm.c b/drivers/mmc/host/sdhci-msm.c
> index 5a33389037cd..d4c02884cca8 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -2151,6 +2151,7 @@ static void sdhci_msm_dump_vendor_regs(struct sdhci_host *host)
>         {.compatible = "qcom,sdhci-msm-v5", .data = &sdhci_msm_v5_var},
>         {.compatible = "qcom,sdm845-sdhci", .data = &sdm845_sdhci_var},
>         {.compatible = "qcom,sm8250-sdhci", .data = &sm8250_sdhci_var},
> +       {.compatible = "qcom,sc7180-sdhci", .data = &sdm845_sdhci_var},
>         {},
>  };
>
> --
> Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project
>