Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753028AbbL2Ji5 (ORCPT ); Tue, 29 Dec 2015 04:38:57 -0500 Received: from hqemgate14.nvidia.com ([216.228.121.143]:3562 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751198AbbL2Jiw (ORCPT ); Tue, 29 Dec 2015 04:38:52 -0500 X-PGP-Universal: processed; by hqnvupgp07.nvidia.com on Tue, 29 Dec 2015 01:23:05 -0800 From: Venu Byravarasu To: "Fu, Zhonghui" , Ulf Hansson CC: Adrian Hunter , "chaotian.jing@mediatek.com" , "lars@metafoo.de" , "sergei.shtylyov@cogentembedded.com" , linux-mmc , "linux-kernel@vger.kernel.org" Subject: RE: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously Thread-Topic: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously Thread-Index: AQHRQYXwiN5RLwIocUK1PxUNM/0yC57htKHg Date: Tue, 29 Dec 2015 09:38:47 +0000 Message-ID: References: <568157A7.8030607@linux.intel.com> In-Reply-To: <568157A7.8030607@linux.intel.com> Accept-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-ms-exchange-transport-fromentityheader: Hosted x-originating-ip: [10.24.194.76] MIME-Version: 1.0 Content-Language: en-US Content-Type: text/plain; charset="utf-8" Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from base64 to 8bit by mail.home.local id tBT9d1H3000517 Content-Length: 1884 Lines: 37 Looks good to me. Acked-by: Venu Byravarasu BR, Venu -----Original Message----- From: Fu, Zhonghui [mailto:zhonghui.fu@linux.intel.com] Sent: Monday, December 28, 2015 9:09 PM To: Ulf Hansson Cc: Adrian Hunter; chaotian.jing@mediatek.com; lars@metafoo.de; Venu Byravarasu; sergei.shtylyov@cogentembedded.com; linux-mmc; linux-kernel@vger.kernel.org Subject: [PATCH 1/2] mmc: enable mmc host device to suspend/resume asynchronously 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 ????{.n?+???????+%?????ݶ??w??{.n?+????{??G?????{ay?ʇڙ?,j??f???h?????????z_??(?階?ݢj"???m??????G????????????&???~???iO???z??v?^?m???? ????????I?