linux-kernel - Re: [PATCH v1] mmc: sdhci-msm: Enable aggressive PM

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Message-ID: <zrqcbghhhpmr2dknipkmqxcxcxnlqr4ury4haqq4n6xja5lc7p@6gh56cndcwjl>
Date: Wed, 27 Nov 2024 06:00:34 +0200
From: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To: Yuanjie Yang <quic_yuanjiey@...cinc.com>
Cc: adrian.hunter@...el.com, ulf.hansson@...aro.org, 
	linux-arm-msm@...r.kernel.org, linux-mmc@...r.kernel.org, linux-kernel@...r.kernel.org, 
	quic_tingweiz@...cinc.com, quic_zhgao@...cinc.com
Subject: Re: [PATCH v1] mmc: sdhci-msm: Enable aggressive PM

On Wed, Nov 27, 2024 at 11:17:08AM +0800, Yuanjie Yang wrote:
> The sdhci-msm driver supports the device in both RUNNING
> and IDLE states, when eMMC/SD are not reading or writing,
> eMMC/SD are in IDLE state, the power management module
> will suspend the device(power off and reduce frequency,
> etc.), putting the device into a low-power mode. But the
> current sdhci-msm driver cannot put device enter into
> low-power mode.
> 
> Enable aggressive PM capability to support runtime PM
> functionality, allowing the eMMC/SD card to enter
> lowe-power mode.
> 
> Signed-off-by: Yuanjie Yang <quic_yuanjiey@...cinc.com>

What is the difference to [1] ?

[1] https://lore.kernel.org/linux-arm-msm/20241104060722.10642-1-quic_sartgarg@quicinc.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 e00208535bd1..e3444d223513 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->caps |= MMC_CAP_AGGRESSIVE_PM;
>  
>  	/* Set the timeout value to max possible */
>  	host->max_timeout_count = 0xF;
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry