From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758125AbcAKF3B (ORCPT ); Mon, 11 Jan 2016 00:29:01 -0500 Received: from mga01.intel.com ([192.55.52.88]:53991 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755519AbcAKF3A (ORCPT ); Mon, 11 Jan 2016 00:29:00 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,551,1444719600"; d="scan'208";a="878760256" Subject: Re: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously To: Ulf Hansson References: <568157A7.8030607@linux.intel.com> Cc: Adrian Hunter , chaotian.jing@mediatek.com, lars@metafoo.de, vbyravarasu@nvidia.com, sergei.shtylyov@cogentembedded.com, linux-mmc , "linux-kernel@vger.kernel.org" From: "Fu, Zhonghui" Message-ID: <56933D98.9090409@linux.intel.com> Date: Mon, 11 Jan 2016 13:28:56 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:38.0) Gecko/20100101 Thunderbird/38.5.0 MIME-Version: 1.0 In-Reply-To: <568157A7.8030607@linux.intel.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi Ulf, What do you think about this patch? Thanks, Zhonghui On 12/28/2015 11:39 PM, 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 dependency between devices. This patch > enables mmc hosts to suspend/resume asynchronously. This will take > advantage of multicore and improve system suspend/resume speed. > After applying this patch and enabling all mmc hosts' child devices > to suspend/resume asynchronously on ASUS T100TA, the system > suspend-to-idle time is reduced from 1645ms to 1107ms, and the > system resume time is reduced from 940ms to 914ms. > > Signed-off-by: Zhonghui Fu > --- > 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 >