From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758258AbcAKFaD (ORCPT ); Mon, 11 Jan 2016 00:30:03 -0500 Received: from mga03.intel.com ([134.134.136.65]:53865 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758132AbcAKFaA (ORCPT ); Mon, 11 Jan 2016 00:30:00 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.20,551,1444719600"; d="scan'208";a="878760702" Subject: Re: [PATCH 2/2] mmc/sdhci-acpi: enable sdhci-acpi device to suspend/resume asynchronously To: Ulf Hansson References: <56815841.80901@linux.intel.com> Cc: Adrian Hunter , michele.curti@gmail.com, Andy Shevchenko , linux-mmc , "linux-kernel@vger.kernel.org" From: "Fu, Zhonghui" Message-ID: <56933DD4.5020607@linux.intel.com> Date: Mon, 11 Jan 2016 13:29:56 +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: <56815841.80901@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 11:41 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 sdhci-acpi devices to suspend/resume asynchronously. This > will take advantage of multicore and improve system suspend/resume > speed. After enabling the sdhci-acpi devices and all their child > devices to suspend/resume asynchronously on ASUS T100TA, the system > suspend-to-idle time is reduced from 1645ms to 1089ms, and the > system resume time is reduced from 940ms to 908ms. > > Signed-off-by: Zhonghui Fu > --- > drivers/mmc/host/sdhci-acpi.c | 2 ++ > 1 files changed, 2 insertions(+), 0 deletions(-) > > diff --git a/drivers/mmc/host/sdhci-acpi.c b/drivers/mmc/host/sdhci-acpi.c > index f6047fc..3d27f2d 100644 > --- a/drivers/mmc/host/sdhci-acpi.c > +++ b/drivers/mmc/host/sdhci-acpi.c > @@ -388,6 +388,8 @@ static int sdhci_acpi_probe(struct platform_device *pdev) > pm_runtime_enable(dev); > } > > + device_enable_async_suspend(dev); > + > return 0; > > err_free: > -- 1.7.1 >