From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Fu, Zhonghui" Subject: Re: [PATCH v3] mmc: enable mmc host device to suspend/resume asynchronously Date: Mon, 23 Nov 2015 12:02:49 +0800 Message-ID: <56528FE9.8090701@linux.intel.com> References: <5648B0BB.5030903@linux.intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mga09.intel.com ([134.134.136.24]:23906 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753101AbbKWECx (ORCPT ); Sun, 22 Nov 2015 23:02:53 -0500 In-Reply-To: <5648B0BB.5030903@linux.intel.com> Sender: linux-mmc-owner@vger.kernel.org List-Id: linux-mmc@vger.kernel.org To: Ulf Hansson , Adrian Hunter , linus.walleij@linaro.org, Markus.Niebel@tq-group.com, lars@metafoo.de, s.hauer@pengutronix.de, kristina.martsenko@gmail.com Cc: linux-mmc , "linux-kernel@vger.kernel.org" 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 > --- > 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 >