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Date: Mon, 23 Nov 2015 12:02:49 +0800 From: "Fu, Zhonghui" <zhonghui.fu@...ux.intel.com> To: Ulf Hansson <ulf.hansson@...aro.org>, Adrian Hunter <adrian.hunter@...el.com>, linus.walleij@...aro.org, Markus.Niebel@...group.com, lars@...afoo.de, s.hauer@...gutronix.de, kristina.martsenko@...il.com CC: linux-mmc <linux-mmc@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> Subject: Re: [PATCH v3] mmc: enable mmc host device to suspend/resume asynchronously Any comments are welcome. Thanks, Zhonghui On 11/16/2015 12:20 AM, Fu, Zhonghui wrote: > Now, PM core supports asynchronous suspend/resume mode for devices > during system suspend/resume, and the power state transition of one > device may be completed in separate kernel thread. PM core ensures > all power state transition timing dependency between devices. This > patch enables mmc host device to suspend/resume asynchronously. This > will take advantage of multicore and improve system suspend/resume > speed. After enabling the mmc host and all their child devices to > suspend/resume asynchronously on ASUS T100TA, the system suspend-to- > idle time is reduced from 1645ms to 1114ms, and the system resume > time is reduced from 940ms to 914ms. > > Signed-off-by: Zhonghui Fu <zhonghui.fu@...ux.intel.com> > --- > Changes in v3: > - Add test result in commit message > > drivers/mmc/core/host.c | 1 + > 1 files changed, 1 insertions(+), 0 deletions(-) > > diff --git a/drivers/mmc/core/host.c b/drivers/mmc/core/host.c > index da950c4..7222fd7 100644 > --- a/drivers/mmc/core/host.c > +++ b/drivers/mmc/core/host.c > @@ -339,6 +339,7 @@ struct mmc_host *mmc_alloc_host(int extra, struct device *dev) > host->class_dev.parent = dev; > host->class_dev.class = &mmc_host_class; > device_initialize(&host->class_dev); > + device_enable_async_suspend(&host->class_dev); > > if (mmc_gpio_alloc(host)) { > put_device(&host->class_dev); > -- 1.7.1 > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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