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

From: Yuanjie Yang
Date: Wed Nov 27 2024 - 01:02:05 EST


On Wed, Nov 27, 2024 at 06:00:34AM +0200, Dmitry Baryshkov wrote:
> 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@xxxxxxxxxxx>
>
> What is the difference to [1] ?
>
> [1] https://lore.kernel.org/linux-arm-msm/20241104060722.10642-1-quic_sartgarg@xxxxxxxxxxx

Thanks for your reminder, I didn't notice there was already a patch. I'll
check upstream first in the future. I will close this patch.

> > ---
> > 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

Thanks,
Yuanjie