From nobody Mon Feb 9 17:22:24 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A2E40C001DF for ; Thu, 3 Aug 2023 06:25:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233243AbjHCGZE (ORCPT ); Thu, 3 Aug 2023 02:25:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232377AbjHCGY6 (ORCPT ); Thu, 3 Aug 2023 02:24:58 -0400 Received: from mgamail.intel.com (unknown [192.55.52.151]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CB3F51724 for ; Wed, 2 Aug 2023 23:24:55 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1691043895; x=1722579895; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=W+Eg75sBaZEQWO5+zNepejl6stQbwCVziILn+2POhMQ=; b=IWsZMFcmSwwS/yoiI3VOdPbh3xyQRWA3JZ+E+6LnKDjZfrQTGJMnyh31 CNAmaDSHRbbbH2Uwkci1JBPY1fLUGeNbnXJen/u/Ka6GkaBmXoycZR0sK mfNrUroFUcMWseSMvaePgEmMk3KXVl9VDTz2+jUype6MhVVLZieyB192r 7wmKxpBH93RGFa6rQzFq/1+7oHgP7QshQxmkK8JYVL08SjiOwpD3ncuVf ZNLA1XEEEEKh9EGpuiNzMlK2Mk4Viak0L1x4V3ee/6Nna3HG5FKZTTNbh 59SCrrOrSK3l2ctHpwJKeaRiDUEV88mRWaNmJSkEe2D+Uii9+ypwkqkMf A==; X-IronPort-AV: E=McAfee;i="6600,9927,10790"; a="350075275" X-IronPort-AV: E=Sophos;i="6.01,251,1684825200"; d="scan'208";a="350075275" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Aug 2023 23:24:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10790"; a="1060117891" X-IronPort-AV: E=Sophos;i="6.01,251,1684825200"; d="scan'208";a="1060117891" Received: from bard-ubuntu.sh.intel.com ([10.239.185.57]) by fmsmga005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Aug 2023 23:23:59 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, pierre-louis.bossart@linux.intel.com, bard.liao@intel.com Subject: [PATCH 1/2] soundwire: intel_auxdevice: enable pm_runtime earlier on startup Date: Thu, 3 Aug 2023 14:52:19 +0800 Message-Id: <20230803065220.3823269-2-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230803065220.3823269-1-yung-chuan.liao@linux.intel.com> References: <20230803065220.3823269-1-yung-chuan.liao@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Pierre-Louis Bossart As soon as the bus starts, physical peripheral devices may report as ATTACHED and set their status with pm_runtime_set_active() in their update_status()/io_init(). This is problematic with the existing code, since the parent pm_runtime status is changed to "active" after starting the bus. This creates a time window where the pm_runtime framework can report an issue, e.g. "rt711 sdw:0:025d:0711:00: runtime PM trying to activate child device sdw:0:025d:0711:00 but parent (sdw-master-0) is not active" This patch enables runtime_pm earlier to make sure the auxiliary device is pm_runtime active after powering-up, but before starting the bus. This problem was exposed by recent changes in the timing of the bus reset, but was present in this driver since we introduced pm_runtime support. Closes: https://github.com/thesofproject/linux/issues/4328 Signed-off-by: Pierre-Louis Bossart Reviewed-by: Ranjani Sridharan Reviewed-by: Rander Wang Signed-off-by: Bard Liao Tested-by: Charles Keepax --- drivers/soundwire/intel_auxdevice.c | 21 +++++++++++++-------- 1 file changed, 13 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_= auxdevice.c index 0daa6ca9a224..f51c776eeeff 100644 --- a/drivers/soundwire/intel_auxdevice.c +++ b/drivers/soundwire/intel_auxdevice.c @@ -248,13 +248,6 @@ int intel_link_startup(struct auxiliary_device *auxdev) =20 sdw_intel_debugfs_init(sdw); =20 - /* start bus */ - ret =3D sdw_intel_start_bus(sdw); - if (ret) { - dev_err(dev, "bus start failed: %d\n", ret); - goto err_power_up; - } - /* Enable runtime PM */ if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) { pm_runtime_set_autosuspend_delay(dev, @@ -266,6 +259,13 @@ int intel_link_startup(struct auxiliary_device *auxdev) pm_runtime_enable(dev); } =20 + /* start bus */ + ret =3D sdw_intel_start_bus(sdw); + if (ret) { + dev_err(dev, "bus start failed: %d\n", ret); + goto err_pm_runtime; + } + clock_stop_quirks =3D sdw->link_res->clock_stop_quirks; if (clock_stop_quirks & SDW_INTEL_CLK_STOP_NOT_ALLOWED) { /* @@ -293,12 +293,17 @@ int intel_link_startup(struct auxiliary_device *auxde= v) * with a delay. A more complete solution would require the * definition of Master properties. */ - if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE)) + if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME_IDLE)) { + pm_runtime_mark_last_busy(dev); pm_runtime_idle(dev); + } =20 sdw->startup_done =3D true; return 0; =20 +err_pm_runtime: + if (!(link_flags & SDW_INTEL_MASTER_DISABLE_PM_RUNTIME)) + pm_runtime_disable(dev); err_power_up: sdw_intel_link_power_down(sdw); err_init: --=20 2.25.1