From nobody Thu Jan 1 23:53:03 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 DC351CDB484 for ; Tue, 17 Oct 2023 16:11:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1343910AbjJQQLX (ORCPT ); Tue, 17 Oct 2023 12:11:23 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37452 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343532AbjJQQLT (ORCPT ); Tue, 17 Oct 2023 12:11:19 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 41D0EB0; Tue, 17 Oct 2023 09:11:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697559078; x=1729095078; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=01fBf8qyJKNXqBVJNmGz++dnHQ6+XueViQQp7+FRMJw=; b=mM7HiliirS0ZvkgVEkcEqT7IMQLWQf+9jynzg2YLco0rumg2lSx1zPJ2 cGuATS0qzBm3cf+StytsUzsb9UNeF+nFYI4JKXqzp/yD4cVJ8BJm76Dg7 Bn2LkH7mZIo+NaK+XbZvAlk8jCsys8d+UNes98dIwa1P8IJvFapgb0dY+ f7z1mzjxVl50SBA17nELfsGly9CK0nJBtxOztRGdsyJZxnD+uNG8ho+U8 GUS3EOZS4v31GYlmLL+yszs8EZif8c4lSsPGkBH7/itbI96bVbls8q5wN jhT3BlJM6Ilj9rZKbW9/gMZitCZtM+Gr2Aw5sv5H+Qh0IFnb/I4+a5mL9 g==; X-IronPort-AV: E=McAfee;i="6600,9927,10866"; a="365167502" X-IronPort-AV: E=Sophos;i="6.03,232,1694761200"; d="scan'208";a="365167502" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2023 09:09:48 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10866"; a="759865020" X-IronPort-AV: E=Sophos;i="6.03,232,1694761200"; d="scan'208";a="759865020" Received: from asprado-mobl2.amr.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.212.55.179]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2023 09:09:47 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org, srinivas.kandagatla@linaro.org Cc: tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org, gregkh@linuxfoundation.org, Bard liao , Jaroslav Kysela , Krzysztof Kozlowski , Philippe Ombredanne , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Pierre-Louis Bossart , Vijendar Mukunda Subject: [RFC PATCH 1/2] soundwire: bus: introduce controller_id Date: Tue, 17 Oct 2023 11:09:32 -0500 Message-Id: <20231017160933.12624-2-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231017160933.12624-1-pierre-louis.bossart@linux.intel.com> References: <20231017160933.12624-1-pierre-louis.bossart@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" The existing SoundWire support misses a clear Controller/Manager hiearchical definition to deal with all variants across SOC vendors. a) Intel platforms have one controller with 4 or more Managers. b) AMD platforms have two controllers with one Manager each, but due to BIOS issues use two different link_id values within the scope of a single controller. c) QCOM platforms have one or more controller with one Manager each. This patch adds a 'controller_id' which can be set by higher levels. If assigned to -1, the controller_id will be set to the system-unique IDA-assigned bus->id. The main change is that the bus->id is no longer used for any device name, which makes the definition completely predictable and not dependent on any enumeration order. The bus->id is only used to insert the Managers in the stream rt context. Reviewed-by: Bard Liao Reviewed-by: Vijendar Mukunda Signed-off-by: Pierre-Louis Bossart Reviewed-by: Krzysztof Kozlowski Tested-by: Krzysztof Kozlowski Tested-by: Srinivas Kandagatla --- drivers/soundwire/amd_manager.c | 8 ++++++++ drivers/soundwire/bus.c | 4 ++++ drivers/soundwire/debugfs.c | 2 +- drivers/soundwire/intel_auxdevice.c | 3 +++ drivers/soundwire/master.c | 2 +- drivers/soundwire/qcom.c | 3 +++ include/linux/soundwire/sdw.h | 4 +++- 7 files changed, 23 insertions(+), 3 deletions(-) diff --git a/drivers/soundwire/amd_manager.c b/drivers/soundwire/amd_manage= r.c index 3a99f6dcdfaf..a3b1f4e6f0f9 100644 --- a/drivers/soundwire/amd_manager.c +++ b/drivers/soundwire/amd_manager.c @@ -927,6 +927,14 @@ static int amd_sdw_manager_probe(struct platform_devic= e *pdev) amd_manager->bus.clk_stop_timeout =3D 200; amd_manager->bus.link_id =3D amd_manager->instance; =20 + /* + * Due to BIOS compatibility, the two links are exposed within + * the scope of a single controller. If this changes, the + * controller_id will have to be updated with drv_data + * information. + */ + amd_manager->bus.controller_id =3D 0; + switch (amd_manager->instance) { case ACP_SDW0: amd_manager->num_dout_ports =3D AMD_SDW0_MAX_TX_PORTS; diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 1720031f35a3..025d3df32bd0 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -22,6 +22,10 @@ static int sdw_get_id(struct sdw_bus *bus) return rc; =20 bus->id =3D rc; + + if (bus->controller_id =3D=3D -1) + bus->controller_id =3D rc; + return 0; } =20 diff --git a/drivers/soundwire/debugfs.c b/drivers/soundwire/debugfs.c index d1553cb77187..67abd7e52f09 100644 --- a/drivers/soundwire/debugfs.c +++ b/drivers/soundwire/debugfs.c @@ -20,7 +20,7 @@ void sdw_bus_debugfs_init(struct sdw_bus *bus) return; =20 /* create the debugfs master-N */ - snprintf(name, sizeof(name), "master-%d-%d", bus->id, bus->link_id); + snprintf(name, sizeof(name), "master-%d-%d", bus->controller_id, bus->lin= k_id); bus->debugfs =3D debugfs_create_dir(name, sdw_debugfs_root); } =20 diff --git a/drivers/soundwire/intel_auxdevice.c b/drivers/soundwire/intel_= auxdevice.c index 7f15e3549e53..93698532deac 100644 --- a/drivers/soundwire/intel_auxdevice.c +++ b/drivers/soundwire/intel_auxdevice.c @@ -234,6 +234,9 @@ static int intel_link_probe(struct auxiliary_device *au= xdev, cdns->instance =3D sdw->instance; cdns->msg_count =3D 0; =20 + /* single controller for all SoundWire links */ + bus->controller_id =3D 0; + bus->link_id =3D auxdev->id; bus->clk_stop_timeout =3D 1; =20 diff --git a/drivers/soundwire/master.c b/drivers/soundwire/master.c index 9b05c9e25ebe..51abedbbaa66 100644 --- a/drivers/soundwire/master.c +++ b/drivers/soundwire/master.c @@ -145,7 +145,7 @@ int sdw_master_device_add(struct sdw_bus *bus, struct d= evice *parent, md->dev.fwnode =3D fwnode; md->dev.dma_mask =3D parent->dma_mask; =20 - dev_set_name(&md->dev, "sdw-master-%d", bus->id); + dev_set_name(&md->dev, "sdw-master-%d-%d", bus->controller_id, bus->link_= id); =20 ret =3D device_register(&md->dev); if (ret) { diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c index 55be9f4b8d59..e3ae4e4e07ac 100644 --- a/drivers/soundwire/qcom.c +++ b/drivers/soundwire/qcom.c @@ -1612,6 +1612,9 @@ static int qcom_swrm_probe(struct platform_device *pd= ev) } } =20 + /* FIXME: is there a DT-defined value to use ? */ + ctrl->bus.controller_id =3D -1; + ret =3D sdw_bus_master_add(&ctrl->bus, dev, dev->fwnode); if (ret) { dev_err(dev, "Failed to register Soundwire controller (%d)\n", diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 4f3d14bb1538..c383579a008b 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -886,7 +886,8 @@ struct sdw_master_ops { * struct sdw_bus - SoundWire bus * @dev: Shortcut to &bus->md->dev to avoid changing the entire code. * @md: Master device - * @link_id: Link id number, can be 0 to N, unique for each Master + * @controller_id: system-unique controller ID. If set to -1, the bus @id = will be used. + * @link_id: Link id number, can be 0 to N, unique for each Controller * @id: bus system-wide unique id * @slaves: list of Slaves on this bus * @assigned: Bitmap for Slave device numbers. @@ -918,6 +919,7 @@ struct sdw_master_ops { struct sdw_bus { struct device *dev; struct sdw_master_device *md; + int controller_id; unsigned int link_id; int id; struct list_head slaves; --=20 2.39.2 From nobody Thu Jan 1 23:53:03 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 92E8CCDB474 for ; Tue, 17 Oct 2023 16:11:26 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344051AbjJQQL0 (ORCPT ); Tue, 17 Oct 2023 12:11:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37454 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1343776AbjJQQLU (ORCPT ); Tue, 17 Oct 2023 12:11:20 -0400 Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5513E9E; Tue, 17 Oct 2023 09:11:19 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1697559079; x=1729095079; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=5TkiqnrgGUR9l/9JjizuOwqg19NNV0hU60DdfXEYDDc=; b=MzMPTeh0rVnc5zh/g61/WcPmeqP80KMkI+28KdC4Fi4Z8cWMiP1MotmO caPcUSQ+jUJMVjv/uHiGKuPHsI0BdLgjkGo0eryqRXNbMLpvs3daGaAjP 93CZvL/racL50jpABYGcMFOg3NNEsRqynnXe91FWqTFU5sNHcp5nekwH1 Um14S4a9XdfETZuBEhlY+978uw32dgMEWQmuCsZtDU8kjY9KbbeXdYuB7 y6Osd8wm9IKCEq8fRbKbvj6AyBx6UDaG9bCbq38mhKCHut/ogJkRj2yQ0 oiZdCX16Pr1oSTb2miFbM28t2n9f3RSiT+TaPz+nH/7I5U6P3wMLdrXv/ w==; X-IronPort-AV: E=McAfee;i="6600,9927,10866"; a="365167515" X-IronPort-AV: E=Sophos;i="6.03,232,1694761200"; d="scan'208";a="365167515" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2023 09:09:49 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10866"; a="759865021" X-IronPort-AV: E=Sophos;i="6.03,232,1694761200"; d="scan'208";a="759865021" Received: from asprado-mobl2.amr.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.212.55.179]) by fmsmga007-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Oct 2023 09:09:48 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org, srinivas.kandagatla@linaro.org Cc: tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org, gregkh@linuxfoundation.org, Bard liao , Jaroslav Kysela , Krzysztof Kozlowski , Philippe Ombredanne , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Vijendar Mukunda , Pierre-Louis Bossart Subject: [RFC PATCH 2/2] soundwire: fix initializing sysfs for same devices on different buses Date: Tue, 17 Oct 2023 11:09:33 -0500 Message-Id: <20231017160933.12624-3-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20231017160933.12624-1-pierre-louis.bossart@linux.intel.com> References: <20231017160933.12624-1-pierre-louis.bossart@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: Krzysztof Kozlowski If same devices with same device IDs are present on different soundwire buses, the probe fails due to conflicting device names and sysfs entries: sysfs: cannot create duplicate filename '/bus/soundwire/devices/sdw:0:021= 7:0204:00:0' The link ID is 0 for both devices, so they should be differentiated by the controller ID. Add the controller ID so, the device names and sysfs ent= ries look like: sdw:1:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6ab0000.soundwi= re-controller/sdw-master-1-0/sdw:1:0:0217:0204:00:0 sdw:3:0:0217:0204:00:0 -> ../../../devices/platform/soc@0/6b10000.soundwi= re-controller/sdw-master-3-0/sdw:3:0:0217:0204:00:0 [PLB changes: use bus->controller_id instead of bus->id] Fixes: 7c3cd189b86d ("soundwire: Add Master registration") Cc: Reviewed-by: Bard Liao Reviewed-by: Vijendar Mukunda Co-developed-by: Pierre-Louis Bossart Signed-off-by: Pierre-Louis Bossart Signed-off-by: Krzysztof Kozlowski Acked-by: Mark Brown Reviewed-by: Krzysztof Kozlowski Tested-by: Krzysztof Kozlowski Tested-by: Srinivas Kandagatla --- drivers/soundwire/slave.c | 12 ++++++------ sound/soc/intel/boards/sof_sdw.c | 4 ++-- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c index c1c1a2ac293a..060c2982e26b 100644 --- a/drivers/soundwire/slave.c +++ b/drivers/soundwire/slave.c @@ -39,14 +39,14 @@ int sdw_slave_add(struct sdw_bus *bus, slave->dev.fwnode =3D fwnode; =20 if (id->unique_id =3D=3D SDW_IGNORED_UNIQUE_ID) { - /* name shall be sdw:link:mfg:part:class */ - dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x", - bus->link_id, id->mfg_id, id->part_id, + /* name shall be sdw:ctrl:link:mfg:part:class */ + dev_set_name(&slave->dev, "sdw:%01x:%01x:%04x:%04x:%02x", + bus->controller_id, bus->link_id, id->mfg_id, id->part_id, id->class_id); } else { - /* name shall be sdw:link:mfg:part:class:unique */ - dev_set_name(&slave->dev, "sdw:%01x:%04x:%04x:%02x:%01x", - bus->link_id, id->mfg_id, id->part_id, + /* name shall be sdw:ctrl:link:mfg:part:class:unique */ + dev_set_name(&slave->dev, "sdw:%01x:%01x:%04x:%04x:%02x:%01x", + bus->controller_id, bus->link_id, id->mfg_id, id->part_id, id->class_id, id->unique_id); } =20 diff --git a/sound/soc/intel/boards/sof_sdw.c b/sound/soc/intel/boards/sof_= sdw.c index 869dacb81133..6575549b8407 100644 --- a/sound/soc/intel/boards/sof_sdw.c +++ b/sound/soc/intel/boards/sof_sdw.c @@ -1242,11 +1242,11 @@ static int fill_sdw_codec_dlc(struct device *dev, else if (is_unique_device(adr_link, sdw_version, mfg_id, part_id, class_id, adr_index)) codec->name =3D devm_kasprintf(dev, GFP_KERNEL, - "sdw:%01x:%04x:%04x:%02x", link_id, + "sdw:0:%01x:%04x:%04x:%02x", link_id, mfg_id, part_id, class_id); else codec->name =3D devm_kasprintf(dev, GFP_KERNEL, - "sdw:%01x:%04x:%04x:%02x:%01x", link_id, + "sdw:0:%01x:%04x:%04x:%02x:%01x", link_id, mfg_id, part_id, class_id, unique_id); =20 if (!codec->name) --=20 2.39.2