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From:   Ulf Hansson <ulf.hansson@linaro.org>
Date:   Tue, 3 Jul 2018 11:00:30 +0200
Message-ID: <CAPDyKFrPw63KD5mESDmm2pya6bsz01jHiKguMP1GPhWDDZ644Q@mail.gmail.com>
Subject: Re: [PATCH v2] mmc: dw_mmc: fix card threshold control configuration
To:     Qing Xia <xiaqing17@hisilicon.com>
Cc:     Jaehoon Chung <jh80.chung@samsung.com>,
        Evgeniy Didin <Evgeniy.Didin@synopsys.com>,
        Shawn Lin <shawn.lin@rock-chips.com>,
        Doug Anderson <dianders@chromium.org>,
        "linux-mmc@vger.kernel.org" <linux-mmc@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
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On 3 July 2018 at 09:06, Qing Xia <xiaqing17@hisilicon.com> wrote:
> From: x00270170 <xiaqing17@hisilicon.com>
>
> Card write threshold control is supposed to be set since controller
> version 2.80a for data write in HS400 mode and data read in
> HS200/HS400/SDR104 mode. However the current code returns without
> configuring it in the case of data writing in HS400 mode.
> Meanwhile the patch fixes that the current code goes to
> 'disable' when doing data reading in HS400 mode.
>
> Fixes: 7e4bf1bc9543 ("mmc: dw_mmc: add the card write threshold for HS400 mode")
> Signed-off-by: Qing Xia <xiaqing17@hisilicon.com>

Thanks, applied/moved to fixes for 4.18!

Kind regards
Uffe

> ---
>  drivers/mmc/host/dw_mmc.c | 7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
> index 29a1afa..3ee8f57 100644
> --- a/drivers/mmc/host/dw_mmc.c
> +++ b/drivers/mmc/host/dw_mmc.c
> @@ -1065,8 +1065,8 @@ static void dw_mci_ctrl_thld(struct dw_mci *host, struct mmc_data *data)
>          * It's used when HS400 mode is enabled.
>          */
>         if (data->flags & MMC_DATA_WRITE &&
> -               !(host->timing != MMC_TIMING_MMC_HS400))
> -               return;
> +               host->timing != MMC_TIMING_MMC_HS400)
> +               goto disable;
>
>         if (data->flags & MMC_DATA_WRITE)
>                 enable = SDMMC_CARD_WR_THR_EN;
> @@ -1074,7 +1074,8 @@ static void dw_mci_ctrl_thld(struct dw_mci *host, struct mmc_data *data)
>                 enable = SDMMC_CARD_RD_THR_EN;
>
>         if (host->timing != MMC_TIMING_MMC_HS200 &&
> -           host->timing != MMC_TIMING_UHS_SDR104)
> +           host->timing != MMC_TIMING_UHS_SDR104 &&
> +           host->timing != MMC_TIMING_MMC_HS400)
>                 goto disable;
>
>         blksz_depth = blksz / (1 << host->data_shift);
> --
> 2.8.1
>