From patchwork Mon Aug 17 15:29:17 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11719725 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 76770138C for ; Tue, 18 Aug 2020 03:28:13 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 07B7D207DA for ; Tue, 18 Aug 2020 03:28:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="u5sWdvST" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 07B7D207DA Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 518FC1714; Tue, 18 Aug 2020 05:27:26 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 518FC1714 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1597721291; bh=UOKPgZJ5wX9PUa5Zv/0zLEyRdO7zyyw4x9ppyX8e4ks=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=u5sWdvSTlwbIlvjsOk6UApPNahRpnodWP/OwKK17ajKeicw9IMabNKqRO7ZMWM8lO y0/CNv+wvgHBRS+j7VrGqk/EDl6P+w3tHrYGTjtrllvmpy0LGjN2I+gbEZyOZQE1cB 870Q9jyWtsatHWzaTEKKvyUHACCrdbWj3yVZnXcY= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 64F09F802E0; Tue, 18 Aug 2020 05:23:46 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id A8267F802F9; Tue, 18 Aug 2020 05:23:44 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: * X-Spam-Status: No, score=1.1 required=5.0 tests=DATE_IN_PAST_06_12, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga04.intel.com (mga04.intel.com [192.55.52.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id C26B1F802E0 for ; Tue, 18 Aug 2020 05:23:36 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz C26B1F802E0 IronPort-SDR: b5t+o1UGuw6+TjfNWyNz0qfBx3ZOxHEY5xsImxPS75nDWATNX5v3Q7hUC9aQZYKXA7dTxskL7N 5bYXfPFFAewA== X-IronPort-AV: E=McAfee;i="6000,8403,9716"; a="152243026" X-IronPort-AV: E=Sophos;i="5.76,325,1592895600"; d="scan'208";a="152243026" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2020 20:23:36 -0700 IronPort-SDR: Wj4fCak+zrkILfBkFtWXpSOQEg6Dys3Yq7izJOvh5/C8Un9Iq6tVG+Akk1LOSq5rfnA+G8OLt4 J0oXj+aD9j9A== X-IronPort-AV: E=Sophos;i="5.76,325,1592895600"; d="scan'208";a="441084609" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2020 20:23:32 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH v2 06/12] soundwire: intel: pm_runtime idle scheduling Date: Mon, 17 Aug 2020 23:29:17 +0800 Message-Id: <20200817152923.3259-7-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200817152923.3259-1-yung-chuan.liao@linux.intel.com> References: <20200817152923.3259-1-yung-chuan.liao@linux.intel.com> Cc: pierre-louis.bossart@linux.intel.com, vinod.koul@linaro.org, tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, mengdong.lin@intel.com, sanyog.r.kale@intel.com, rander.wang@linux.intel.com, bard.liao@intel.com X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" From: Pierre-Louis Bossart Add quirk and pm_runtime idle scheduling to let the Master suspend if no Slaves become attached. This can happen when a link is not marked as disabled and has devices exposed in the DSDT, if the power is controlled by sideband means or the link includes a pluggable connector. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Rander Wang Signed-off-by: Bard Liao --- drivers/soundwire/intel.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 95a1d88a5bfb..3f9015dcb693 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -31,8 +31,9 @@ * flags reused in each byte, with master0 using the ls-byte, etc. */ -#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME BIT(0) -#define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP BIT(1) +#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME BIT(0) +#define SDW_INTEL_MASTER_DISABLE_CLOCK_STOP BIT(1) +#define SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE BIT(2) static int md_flags; module_param_named(sdw_md_flags, md_flags, int, 0444); @@ -1422,6 +1423,22 @@ int intel_master_startup(struct platform_device *pdev) pm_runtime_enable(dev); } + /* + * The runtime PM status of Slave devices is "Unsupported" + * until they report as ATTACHED. If they don't, e.g. because + * there are no Slave devices populated or if the power-on is + * delayed or dependent on a power switch, the Master will + * remain active and prevent its parent from suspending. + * + * Conditionally force the pm_runtime core to re-evaluate the + * Master status in the absence of any Slave activity. A quirk + * is provided to e.g. deal with Slaves that may be powered on + * with a delay. A more complete solution would require the + * definition of Master properties. + */ + if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE)) + pm_runtime_idle(dev); + return 0; err_interrupt: @@ -1561,6 +1578,7 @@ static int intel_resume(struct device *dev) struct sdw_cdns *cdns = dev_get_drvdata(dev); struct sdw_intel *sdw = cdns_to_intel(cdns); struct sdw_bus *bus = &cdns->bus; + int link_flags; int ret; if (bus->prop.hw_disabled) { @@ -1577,6 +1595,10 @@ static int intel_resume(struct device *dev) pm_runtime_set_active(dev); pm_runtime_mark_last_busy(dev); pm_runtime_enable(dev); + + link_flags = md_flags >> (bus->link_id * 8); + if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE)) + pm_runtime_idle(dev); } ret = intel_init(sdw);