From patchwork Tue Sep 1 15:05:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11749773 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 3AC5B722 for ; Wed, 2 Sep 2020 03:04:19 +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 C4A992068F for ; Wed, 2 Sep 2020 03:04:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="Si4I4xVX" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org C4A992068F 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 524E317F9; Wed, 2 Sep 2020 05:03:33 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 524E317F9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1599015857; bh=LdyoNAOTCDidOr7mS9T0/s6JrwJYfjjmv9qWpjknaYY=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=Si4I4xVXO/7l11bXUnppyucSJrjRN8QzCrVFvGjQuTaHL4CkwGWjjYbycyjatCI5C hY6AJsjXJXwImz/wImB8GuTxGhz5Zojjz+PdlpvGPVtPt+5P4Dty8MXqJCGefMcXwa MifJ/GAWdRxk6Ni58PgXRZxyRGb9Hjrho7kx2bZc= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 97096F802E7; Wed, 2 Sep 2020 05:00:33 +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 224EEF802DB; Wed, 2 Sep 2020 05:00:03 +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 A1273F80212 for ; Wed, 2 Sep 2020 04:59:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz A1273F80212 IronPort-SDR: QcIsnmFKE4hRrl2gzFg/fCcrzXmmdoJj5TJSd+NqTCtF78K0004mGXfR/vrIw10mquHDJfW1os 1k7JZPpAIQ4Q== X-IronPort-AV: E=McAfee;i="6000,8403,9731"; a="156570751" X-IronPort-AV: E=Sophos;i="5.76,381,1592895600"; d="scan'208";a="156570751" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2020 19:59:56 -0700 IronPort-SDR: XirWR19BgRgDyggOkar4n1daIoDsUOv7aFYdJG5Jzxq+WnAx3xsbO4v9VhEf/o9GiLpTXo2/c2 e7uVauAjV/VA== X-IronPort-AV: E=Sophos;i="5.76,381,1592895600"; d="scan'208";a="283588086" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2020 19:59:52 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH v2 04/10] soundwire: intel: add missing support for all clock stop modes Date: Tue, 1 Sep 2020 23:05:50 +0800 Message-Id: <20200901150556.19432-5-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200901150556.19432-1-yung-chuan.liao@linux.intel.com> References: <20200901150556.19432-1-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 Deal with the BUS_RESET case, which is the default. The only change is to add support for the exit sequence using the syncArm/syncGo mode for the exit reset sequence. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/intel.c | 49 +++++++++++++++++++++++++++++++-------- 1 file changed, 39 insertions(+), 10 deletions(-) diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 259e3da98e42..8634d33c388c 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -1868,11 +1868,6 @@ static int intel_resume_runtime(struct device *dev) if (!clock_stop0) { - /* - * Re-initialize the IP since it was powered-off - */ - sdw_cdns_init(&sdw->cdns); - /* * make sure all Slaves are tagged as UNATTACHED and * provide reason for reinitialization @@ -1880,13 +1875,31 @@ static int intel_resume_runtime(struct device *dev) status = SDW_UNATTACH_REQUEST_MASTER_RESET; sdw_clear_slave_status(bus, status); - } + ret = sdw_cdns_enable_interrupt(cdns, true); + if (ret < 0) { + dev_err(dev, "cannot enable interrupts during resume\n"); + return ret; + } - ret = sdw_cdns_enable_interrupt(cdns, true); - if (ret < 0) { - dev_err(dev, "cannot enable interrupts during resume\n"); - return ret; + /* + * follow recommended programming flows to avoid + * timeouts when gsync is enabled + */ + if (multi_link) + intel_shim_sync_arm(sdw); + + /* + * Re-initialize the IP since it was powered-off + */ + sdw_cdns_init(&sdw->cdns); + + } else { + ret = sdw_cdns_enable_interrupt(cdns, true); + if (ret < 0) { + dev_err(dev, "cannot enable interrupts during resume\n"); + return ret; + } } ret = sdw_cdns_clock_restart(cdns, !clock_stop0); @@ -1894,6 +1907,22 @@ static int intel_resume_runtime(struct device *dev) dev_err(dev, "unable to restart clock during resume\n"); return ret; } + + if (!clock_stop0) { + ret = sdw_cdns_exit_reset(cdns); + if (ret < 0) { + dev_err(dev, "unable to exit bus reset sequence during resume\n"); + return ret; + } + + if (multi_link) { + ret = intel_shim_sync_go(sdw); + if (ret < 0) { + dev_err(sdw->cdns.dev, "sync go failed during resume\n"); + return ret; + } + } + } } else if (!clock_stop_quirks) { ret = intel_init(sdw); if (ret) {