From patchwork Tue Aug 27 13:07:07 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 13779526 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) (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 7AE461C57AC; Tue, 27 Aug 2024 13:08:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.15 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724764111; cv=none; b=hVaZw50z3zUYOzy5WTjmxvTfn2FMaqLcwyScU+/wGTRGfg+8bHV1kAUG3efPrNGMIA+vcPbzV44O2U3Foc+tSfpwAicc4a7fKeFnJaOTMotHALke39yXAorHQjPJqrXxMv2Oa2/p63BBmECjJTJimUDWq6bu9r6HW+nQn9hHmPE= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724764111; c=relaxed/simple; bh=eSJuvZ4Q+njTExXsTZ7XIOuYEEP6S/r8p97JVTQ9T/c=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=i9CLi4JHFatwGFlmhlzpQuHuHdB6VdCSrFuA23TmfnB/44ShfztaIYKs2xakHN3YueR+Qpmd1RHm8fA6TOa3drMlCVL7uxSDu8JzK5qFnOqLT6dgDyB78YKZezCuq+LP/DUXwgQeYFTgotE0KXxwqmdFgQAyLq0gMPLfR6JztPw= 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=BzcnpWlq; arc=none smtp.client-ip=192.198.163.15 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="BzcnpWlq" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1724764109; x=1756300109; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=eSJuvZ4Q+njTExXsTZ7XIOuYEEP6S/r8p97JVTQ9T/c=; b=BzcnpWlqwCGTp2bGVBf+JrvGDh2Cyl0Ku29rUg+992WGdwh1RPsmLnlj EJacq67igJF7avRm6oLPCqawgE5vIcd5am46QSDn5+HGQEMtswo0nQhR6 F1BUiGJE1EgJzW18nZaTusvBn5v6vPIBTzLQenSnTiOPMKbJxqiRN22jP QyUwP5faZcmTBTqFNWgKG/63alGjK7cuThp7+RFdHTYVIPln2oU98R+mi YZPEdimkn/k/LZhH/RcZqvMmtPTCYUhp3cCmPWYPlJ9lQRpDcHYq35ogX GDO5fHkJrIsmz0mY890MKQi946Ui4QkeoIKJzqn2xjLzJwiB84wtb5iOO w==; X-CSE-ConnectionGUID: mDzeN8TeTFqy+v/3Ji4yzQ== X-CSE-MsgGUID: kVwqhwI3Sp2p3YQSjZY9hQ== X-IronPort-AV: E=McAfee;i="6700,10204,11176"; a="23400661" X-IronPort-AV: E=Sophos;i="6.10,180,1719903600"; d="scan'208";a="23400661" Received: from fmviesa004.fm.intel.com ([10.60.135.144]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Aug 2024 06:08:29 -0700 X-CSE-ConnectionGUID: qyz7k+CiT7efcD87cWMQdw== X-CSE-MsgGUID: V+IjgattRnem//1MWGS9uw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.10,180,1719903600"; d="scan'208";a="67552168" Received: from anmitta2-mobl4.gar.corp.intel.com (HELO yungchua-desk.intel.com) ([10.247.118.39]) by fmviesa004-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Aug 2024 06:08:27 -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 14/14] soundwire: mipi-disco: add support for DP0/DPn 'lane-list' property Date: Tue, 27 Aug 2024 21:07:07 +0800 Message-ID: <20240827130707.298477-15-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20240827130707.298477-1-yung-chuan.liao@linux.intel.com> References: <20240827130707.298477-1-yung-chuan.liao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-sound@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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 2215c53f95de..23c1a413598c 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 = mipi_fwnode_property_read_bool(port, "mipi-sdw-imp-def-dp0-interrupts-supported"); + nval = fwnode_property_count_u32(port, "mipi-sdw-lane-list"); + if (nval > 0) { + dp0->num_lanes = nval; + dp0->lane_list = devm_kcalloc(&slave->dev, + dp0->num_lanes, sizeof(*dp0->lane_list), + GFP_KERNEL); + if (!dp0->lane_list) + return -ENOMEM; + + ret = fwnode_property_read_u32_array(port, + "mipi-sdw-lane-list", + dp0->lane_list, dp0->num_lanes); + if (ret < 0) + return ret; + } + return 0; } @@ -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); + nval = fwnode_property_count_u32(node, "mipi-sdw-lane-list"); + if (nval > 0) { + dpn[i].num_lanes = nval; + dpn[i].lane_list = devm_kcalloc(&slave->dev, + dpn[i].num_lanes, sizeof(*dpn[i].lane_list), + GFP_KERNEL); + if (!dpn[i].lane_list) + return -ENOMEM; + + ret = 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); 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; }; /** @@ -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;