linux-kernel - Re: [PATCH v3 1/1] mmc: core: Add HS400 tuning in HS400es initialization

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Date: Tue, 2 Jan 2024 17:57:14 +0100
From: Ulf Hansson <ulf.hansson@...aro.org>
To: Mengqi Zhang <mengqi.zhang@...iatek.com>
Cc: chaotian.jing@...iatek.com, matthias.bgg@...il.com, 
	wenbin.mei@...iatek.com, yangyingliang@...wei.com, adrian.hunter@...el.com, 
	avri.altman@....com, vincent.whitchurch@...s.com, linux-mmc@...r.kernel.org, 
	linux-arm-kernel@...ts.infradead.org, linux-mediatek@...ts.infradead.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 1/1] mmc: core: Add HS400 tuning in HS400es initialization

On Mon, 25 Dec 2023 at 10:39, Mengqi Zhang <mengqi.zhang@...iatek.com> wrote:
>
> During the initialization to HS400es stage, add hs400 tuning flow as an
> optional process. For Mediatek IP, HS00es mode requires a specific
> tuning to ensure the correct HS400 timing setting.
>
> Signed-off-by: Mengqi Zhang <mengqi.zhang@...iatek.com>

Applied for next, thanks!

Kind regards
Uffe


> ---
> v1 https://patchwork.kernel.org/project/linux-mediatek/patch/20231201030547.11553-1-mengqi.zhang@mediatek.com/
> v2 https://patchwork.kernel.org/project/linux-mediatek/patch/20231222062236.26370-1-mengqi.zhang@mediatek.com/
> ---
>  drivers/mmc/core/mmc.c | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
> index 705942edacc6..d5173a9bb4b0 100644
> --- a/drivers/mmc/core/mmc.c
> +++ b/drivers/mmc/core/mmc.c
> @@ -1822,8 +1822,13 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
>
>                 if (err)
>                         goto free_card;
> -
> -       } else if (!mmc_card_hs400es(card)) {
> +       } else if (mmc_card_hs400es(card)) {
> +               if (host->ops->execute_hs400_tuning) {
> +                       err = host->ops->execute_hs400_tuning(host, card);
> +                       if (err)
> +                               goto free_card;
> +               }
> +       } else {
>                 /* Select the desired bus width optionally */
>                 err = mmc_select_bus_width(card);
>                 if (err > 0 && mmc_card_hs(card)) {
> --
> 2.25.1
>