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

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Message-ID: <CAD=FV=VzkwnxqZ04dqWUdZ+RJ4ioSJ4ruBp9u8NxL3mvuwJnuQ@mail.gmail.com>
Date:   Thu, 27 Aug 2020 08:43:34 -0700
From:   Doug Anderson <dianders@...omium.org>
To:     Veerabhadrarao Badiganti <vbadigan@...eaurora.org>
Cc:     Adrian Hunter <adrian.hunter@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Linux MMC List <linux-mmc@...r.kernel.org>,
        LKML <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

Hi,

On Thu, Aug 27, 2020 at 8:22 AM 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>
> ---
>  drivers/mmc/host/sdhci-msm.c | 1 +
>  1 file changed, 1 insertion(+)

Whoops!  I was too busy debugging and preparing patches and didn't
realize that you'd already sent this.  Sorry for sending it too.
Let's take yours.

Reviewed-by: Douglas Anderson <dianders@...omium.org>
Tested-by: Douglas Anderson <dianders@...omium.org>