linux-kernel - Re: [PATCH V2 2/2] mmc: sdhci-msm: Enable MMC_CAP2_SLEEP

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Message-ID: <CA+Da2qz=jSfi=WzJyykaMUd4RSYMORe05YQS_y3c0cEW=o4-Vg@mail.gmail.com>
Date:   Sun, 8 Oct 2023 10:22:30 +0800
From:   Wenchao Chen <wenchao.chen666@...il.com>
To:     Sarthak Garg <quic_sartgarg@...cinc.com>
Cc:     adrian.hunter@...el.com, ulf.hansson@...aro.org,
        linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, quic_rampraka@...cinc.com,
        quic_pragalla@...cinc.com, quic_sayalil@...cinc.com,
        quic_nitirawa@...cinc.com, quic_sachgupt@...cinc.com,
        quic_bhaskarv@...cinc.com, quic_narepall@...cinc.com,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>
Subject: Re: [PATCH V2 2/2] mmc: sdhci-msm: Enable MMC_CAP2_SLEEP_AWAKE for
 Qualcomm controllers

On Fri, 29 Sept 2023 at 22:44, Sarthak Garg <quic_sartgarg@...cinc.com> wrote:
>
> Enable MMC_CAP2_SLEEP_AWAKE for Qualcomm controllers to let them use
> sleep/awake functionality for faster eMMC resume instead of
> doing full initialization.
>
> Signed-off-by: Sarthak Garg <quic_sartgarg@...cinc.com>
> ---
>  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 668e0aceeeba..be44a6851fc9 100644
> --- a/drivers/mmc/host/sdhci-msm.c
> +++ b/drivers/mmc/host/sdhci-msm.c
> @@ -2627,6 +2627,7 @@ static int sdhci_msm_probe(struct platform_device *pdev)
>         }
>
>         msm_host->mmc->caps |= MMC_CAP_WAIT_WHILE_BUSY | MMC_CAP_NEED_RSP_BUSY;
> +       msm_host->mmc->caps2 |= MMC_CAP2_SLEEP_AWAKE;
>

Need "MMC_CAP_AGGRESSIVE_PM"?
/*
 * Callback for runtime_suspend.
 */
static int mmc_runtime_suspend(struct mmc_host *host)
{
int err;

if (!(host->caps & MMC_CAP_AGGRESSIVE_PM))
return 0;

err = _mmc_suspend(host, true);
if (err)
pr_err("%s: error %d doing aggressive suspend\n",
mmc_hostname(host), err);

return err;
}



>         /* Set the timeout value to max possible */
>         host->max_timeout_count = 0xF;
> --
> 2.17.1
>