From nobody Sat Nov 30 07:47:04 2024 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 449AA1A262F; Wed, 11 Sep 2024 11:59:37 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.11 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726055978; cv=none; b=E0cAD1BdE82z+4xUS5YxOpKAUEE066YAjXWp4eQDqE8prjKODj6r2rLNEKVpTnDerWQcvQFdj4f5fAf9NWeja27OtK9lJFAEmGWFxnRSU4fCV/TO9itXQD7+oThjJhLOHif5bmzizURXC0aUaOkAJDoPD4UKo+KIU91riwoofFk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1726055978; c=relaxed/simple; bh=awf+jdv0Kcu1kulfBFzwxSCd1Qw1p3qofzbE26Kc4ow=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=Wh40LDb+POHmarTXO9vTepHiFReF/ixFD9G2XkeBshylnoaOA6h/ZXVd8UK8dnvv2yUuUI3Ges4g0jdzNmDOJK29lceZUNP7MzDNjV7kO26XhEYgOa7jW433YbnIJNMAKVhclmEwoUOuBEuSoE9lo0KWAofyI0WyIa33aROsD+c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=n4GN0MF1; arc=none smtp.client-ip=198.175.65.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="n4GN0MF1" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1726055977; x=1757591977; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=awf+jdv0Kcu1kulfBFzwxSCd1Qw1p3qofzbE26Kc4ow=; b=n4GN0MF193fDGqbCGJ8XkrojmcMBvbqFgDfxLD+yII5c2ZhaA4IRLAa0 TcHuYCifUObUDw6zPqa57DxHMEGQoXem2iSZ0WJvVX3aWbz99PmClFW+E w9F+IMOi3YOzkIy+3nXLahAkmjufC03xfCJtPkxBQ8f+TZdWwYmh7yz/v tsFYRVDQU9QofsX1sl/sxYYshRURa6zyiR8CFmG7EadGVDG+lmRT1XhKW N6TqI7FvzhaYWL9q113xidyz1JpkWfRe8MSZScbbXO1HvQEvS7Iql6JjM pYl4NCQJ/+k2bYqfjLLBV5LHW14lwkPvzn2BaIuZUcYuMR0mALhCxSVVU w==; X-CSE-ConnectionGUID: +dXxeMdkRgy/pTvWQNScVg== X-CSE-MsgGUID: v1iBdf88QhiR5d8Oq7IThg== X-IronPort-AV: E=McAfee;i="6700,10204,11191"; a="35417287" X-IronPort-AV: E=Sophos;i="6.10,219,1719903600"; d="scan'208";a="35417287" Received: from orviesa009.jf.intel.com ([10.64.159.149]) by orvoesa103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2024 04:59:37 -0700 X-CSE-ConnectionGUID: PzjPFISkQge9sGjrLk5HYQ== X-CSE-MsgGUID: 15xmwU5mQNi7PFMgEa+LKA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,219,1719903600"; d="scan'208";a="67292833" Received: from bvivekan-mobl2.gar.corp.intel.com (HELO yungchua-desk.intel.com) ([10.247.118.254]) by orviesa009-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Sep 2024 04:59:35 -0700 From: Bard Liao To: linux-sound@vger.kernel.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 v2 14/14] soundwire: mipi-disco: add support for DP0/DPn 'lane-list' property Date: Wed, 11 Sep 2024 19:58:27 +0800 Message-ID: <20240911115827.233171-15-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240911115827.233171-1-yung-chuan.liao@linux.intel.com> References: <20240911115827.233171-1-yung-chuan.liao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Pierre-Louis Bossart The SoundWire specification did not clearly require that ports could use all Lanes. Some SoundWire/SDCA peripheral adopters added restrictions on which lanes can be used by what port, and the DisCo for SoundWire 2.1 specification added a 'lane-list' property to model this hardware limitation. When not specified, the ports can use all Lanes. Otherwise, the 'lane-list' indicates which Lanes can be used, sorted by order of preference (most-preferred-first). This patch only reads the properties, the use of this property will come at a later time with multi-lane support. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/mipi_disco.c | 32 ++++++++++++++++++++++++++++++++ include/linux/soundwire/sdw.h | 8 ++++++++ 2 files changed, 40 insertions(+) diff --git a/drivers/soundwire/mipi_disco.c b/drivers/soundwire/mipi_disco.c index 36e734751225..9d59f486edbe 100644 --- a/drivers/soundwire/mipi_disco.c +++ b/drivers/soundwire/mipi_disco.c @@ -197,6 +197,22 @@ static int sdw_slave_read_dp0(struct sdw_slave *slave, dp0->imp_def_interrupts =3D mipi_fwnode_property_read_bool(port, "mipi-sdw-imp-def-dp0-interrupts-supported"); =20 + nval =3D fwnode_property_count_u32(port, "mipi-sdw-lane-list"); + if (nval > 0) { + dp0->num_lanes =3D nval; + dp0->lane_list =3D devm_kcalloc(&slave->dev, + dp0->num_lanes, sizeof(*dp0->lane_list), + GFP_KERNEL); + if (!dp0->lane_list) + return -ENOMEM; + + ret =3D fwnode_property_read_u32_array(port, + "mipi-sdw-lane-list", + dp0->lane_list, dp0->num_lanes); + if (ret < 0) + return ret; + } + return 0; } =20 @@ -326,6 +342,22 @@ static int sdw_slave_read_dpn(struct sdw_slave *slave, fwnode_property_read_u32(node, "mipi-sdw-port-encoding-type", &dpn[i].port_encoding); =20 + nval =3D fwnode_property_count_u32(node, "mipi-sdw-lane-list"); + if (nval > 0) { + dpn[i].num_lanes =3D nval; + dpn[i].lane_list =3D devm_kcalloc(&slave->dev, + dpn[i].num_lanes, sizeof(*dpn[i].lane_list), + GFP_KERNEL); + if (!dpn[i].lane_list) + return -ENOMEM; + + ret =3D fwnode_property_read_u32_array(node, + "mipi-sdw-lane-list", + dpn[i].lane_list, dpn[i].num_lanes); + if (ret < 0) + return ret; + } + fwnode_handle_put(node); =20 i++; diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 952514f044f0..73f655334fe9 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -238,6 +238,8 @@ enum sdw_clk_stop_mode { * @simple_ch_prep_sm: If channel prepare sequence is required * @imp_def_interrupts: If set, each bit corresponds to support for * implementation-defined interrupts + * @num_lanes: array size of @lane_list + * @lane_list: indicates which Lanes can be used by DP0 * * The wordlengths are specified by Spec as max, min AND number of * discrete values, implementation can define based on the wordlengths they @@ -252,6 +254,8 @@ struct sdw_dp0_prop { bool BRA_flow_controlled; bool simple_ch_prep_sm; bool imp_def_interrupts; + int num_lanes; + u32 *lane_list; }; =20 /** @@ -275,6 +279,8 @@ struct sdw_dp0_prop { * @num_ch_combinations: Number of channel combinations supported * @channels: Discrete channels supported * @ch_combinations: Channel combinations supported + * @lane_list: indicates which Lanes can be used by DPn + * @num_lanes: array size of @lane_list * @modes: SDW mode supported * @max_async_buffer: Number of samples that this port can buffer in * asynchronous modes @@ -300,6 +306,8 @@ struct sdw_dpn_prop { u32 num_ch_combinations; u32 *channels; u32 *ch_combinations; + u32 *lane_list; + int num_lanes; u32 modes; u32 max_async_buffer; u32 port_encoding; --=20 2.43.0