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

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Message-Id: <20241127031708.2343727-1-quic_yuanjiey@quicinc.com>
Date: Wed, 27 Nov 2024 11:17:08 +0800
From: Yuanjie Yang <quic_yuanjiey@...cinc.com>
To: adrian.hunter@...el.com, ulf.hansson@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Cc: quic_tingweiz@...cinc.com, quic_zhgao@...cinc.com,
        quic_yuanjiey@...cinc.com
Subject: [PATCH v1] mmc: sdhci-msm: Enable aggressive PM

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>
---
 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