From patchwork Tue Jul 21 20:37:11 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11677721 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 524C113B4 for ; Wed, 22 Jul 2020 08:34:35 +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 DC5DB20787 for ; Wed, 22 Jul 2020 08:34:34 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="V+78ywOW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DC5DB20787 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 D683C165E; Wed, 22 Jul 2020 10:33:46 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz D683C165E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1595406872; bh=6ySk8/c+XmyrcM1Kz3ppRA2FfWzNrDFDJBPI5jKs9sk=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=V+78ywOWVMiQQzU9IIbvwBqYcZHDHr6TzQuzHjtzeZimD37/WK1c2JG3LJplT4Vtb UDxsz4jF5BhxS4kEkWNm2ff6jPl9QkRdavkAcKnrncIHMbe47MsMXdtgNgfCjev0X8 74KeP6RvVzKBlFZtyO4aX7VVtx+bfBxobbsq6sT0= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 7415FF80290; Wed, 22 Jul 2020 10:32:11 +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 84009F8028C; Wed, 22 Jul 2020 10:32:09 +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 mga14.intel.com (mga14.intel.com [192.55.52.115]) (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 DD42EF8014C for ; Wed, 22 Jul 2020 10:31:54 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz DD42EF8014C IronPort-SDR: lX16rxyUmVrSfuaWnRmS9Fwos7mpSjZpiMQP9rZBSrZx8/t8lvR/scUrucccAOtpNjebnPNrjz KseINzlOBpWQ== X-IronPort-AV: E=McAfee;i="6000,8403,9689"; a="149457247" X-IronPort-AV: E=Sophos;i="5.75,381,1589266800"; d="scan'208";a="149457247" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga004.jf.intel.com ([10.7.209.38]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Jul 2020 01:31:48 -0700 IronPort-SDR: PvAEKZv+qpQ+GdZaWS5N/8uJnBcw2oEDj56hyXGUACViOog9I07fC1uBSGQVW6dteYspJvl8AW lsP+4lpwdTAw== X-IronPort-AV: E=Sophos;i="5.75,381,1589266800"; d="scan'208";a="432303146" 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; 22 Jul 2020 01:31:43 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH 01/13] soundwire: intel: Add basic power management support Date: Wed, 22 Jul 2020 04:37:11 +0800 Message-Id: <20200721203723.18305-2-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200721203723.18305-1-yung-chuan.liao@linux.intel.com> References: <20200721203723.18305-1-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, slawomir.blauciak@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 Implement suspend/resume capabilities (not runtime_pm for now) The resume part is essentially a full-blown re-enumeration. When S0ix is supported, we will select clock stop mode when the ACPI target state is S0, and tear down the link for S3. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/intel.c | 81 ++++++++++++++++++++++++++++++++++++++- 1 file changed, 79 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 23b66dcf9966..eb628f255cf5 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -463,7 +463,7 @@ static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable) mutex_unlock(sdw->link_res->shim_lock); } -static int __maybe_unused intel_link_power_down(struct sdw_intel *sdw) +static int intel_link_power_down(struct sdw_intel *sdw) { int link_control, spa_mask, cpa_mask; unsigned int link_id = sdw->instance; @@ -1375,12 +1375,89 @@ int intel_master_process_wakeen_event(struct platform_device *pdev) return 0; } +/* + * PM calls + */ + +#ifdef CONFIG_PM + +static int intel_suspend(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 ret; + + if (bus->prop.hw_disabled) { + dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", + bus->link_id); + return 0; + } + + ret = sdw_cdns_enable_interrupt(cdns, false); + if (ret < 0) { + dev_err(dev, "cannot disable interrupts on suspend\n"); + return ret; + } + + ret = intel_link_power_down(sdw); + if (ret) { + dev_err(dev, "Link power down failed: %d", ret); + return ret; + } + + intel_shim_wake(sdw, false); + + return 0; +} + +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 ret; + + if (bus->prop.hw_disabled) { + dev_dbg(dev, "SoundWire master %d is disabled, ignoring\n", + bus->link_id); + return 0; + } + + ret = intel_init(sdw); + if (ret) { + dev_err(dev, "%s failed: %d", __func__, ret); + return ret; + } + + ret = sdw_cdns_enable_interrupt(cdns, true); + if (ret < 0) { + dev_err(dev, "cannot enable interrupts during resume\n"); + return ret; + } + + ret = sdw_cdns_exit_reset(cdns); + if (ret < 0) { + dev_err(dev, "unable to exit bus reset sequence during resume\n"); + return ret; + } + + return ret; +} + +#endif + +static const struct dev_pm_ops intel_pm = { + SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume) +}; + static struct platform_driver sdw_intel_drv = { .probe = intel_master_probe, .remove = intel_master_remove, .driver = { .name = "intel-sdw", - }, + .pm = &intel_pm, + } }; module_platform_driver(sdw_intel_drv);