From patchwork Thu Jun 30 15:01:33 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Binding X-Patchwork-Id: 12901961 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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 0652EC43334 for ; Thu, 30 Jun 2022 15:02:47 +0000 (UTC) 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 50FCA16A5; Thu, 30 Jun 2022 17:01:55 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 50FCA16A5 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1656601365; bh=XqgGJ6MmzmPKOtqvJyrzF0FBmx0mtrj9NZQAPSLZfko=; h=From:To:Subject:Date:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=C0sqq62m2gGzAYFvBnvOj2I8B/kZuHmjEvgcmh+Hp6TnWMkgMXHkzBshA/CXnAnV9 hhefty88bEP5aw1CBg97bOipdiK4Tn4FAzDY6ycd6uTtUwAwudUEqxzmfcHAPJJVJ2 4K/lfOMcpwtz0FXtLRTqDYVrbypnnyeKasnfjrcI= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id B9103F804DA; Thu, 30 Jun 2022 17:01:54 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 155E9F804DA; Thu, 30 Jun 2022 17:01:53 +0200 (CEST) Received: from mx0b-001ae601.pphosted.com (mx0b-001ae601.pphosted.com [67.231.152.168]) (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 E033EF800F5 for ; Thu, 30 Jun 2022 17:01:45 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz E033EF800F5 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="Kpsx+2b3" Received: from pps.filterd (m0077474.ppops.net [127.0.0.1]) by mx0b-001ae601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 25UDiqaR003941; Thu, 30 Jun 2022 10:01:42 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=cirrus.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=PODMain02222019; bh=tE00initlptw2sRprEoJ6Mg4Fr4Jr2LI3wz+6oohsnw=; b=Kpsx+2b3g0eZiSfOenerOaJbdmisDNhmsyInogeXFMIQES1CyhEQd2Rozz4AcXSFVYa5 QvpJIO4LTKH8puJx0sDZu7/hwEj1vr1HW2eNlKClZh8pg/HiXzdzdlDVk+yh2ln7R2Ah ViNwfJXZ/vfvxfopn1Jmknd+eIFvd5YsfHXCJmi9g+9Q8aeUgZzSl7OKV/J5Z+acVJfk KYse+5GTHvCCk9v+ETioSsh/JUM21gpWmOwxlDjRJpnaqv8DNTIHnewkd6LaUqEceH63 CqtBnQNCJr2l5Gd3RwTLadPYN/IDrsVkNFrGcWiL4IWRqmjIaRvVoAY4CS10gzp/q77m 4w== Received: from ediex01.ad.cirrus.com ([84.19.233.68]) by mx0b-001ae601.pphosted.com (PPS) with ESMTPS id 3gwxsq6r1g-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Thu, 30 Jun 2022 10:01:41 -0500 Received: from EDIEX01.ad.cirrus.com (198.61.84.80) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Thu, 30 Jun 2022 16:01:40 +0100 Received: from ediswmail.ad.cirrus.com (198.61.86.93) by EDIEX01.ad.cirrus.com (198.61.84.80) with Microsoft SMTP Server id 15.1.2375.28 via Frontend Transport; Thu, 30 Jun 2022 16:01:40 +0100 Received: from sbinding-cirrus-dsktp.ad.cirrus.com (unknown [198.90.238.163]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 573062A9; Thu, 30 Jun 2022 15:01:39 +0000 (UTC) From: Stefan Binding To: "Rafael J . Wysocki" , Len Brown , Mark Brown , Liam Girdwood Subject: [PATCH v5 0/2] Read _SUB from ACPI to be able to identify firmware Date: Thu, 30 Jun 2022 16:01:33 +0100 Message-ID: <20220630150135.1799535-1-sbinding@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Proofpoint-GUID: qsewX1yu3afAJzCcZISt3uqbIWxdt7hg X-Proofpoint-ORIG-GUID: qsewX1yu3afAJzCcZISt3uqbIWxdt7hg X-Proofpoint-Spam-Reason: safe Cc: linux-acpi@vger.kernel.org, alsa-devel@alsa-project.org, Stefan Binding , linux-kernel@vger.kernel.org, patches@opensource.cirrus.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" CS35L41 has a DSP which is able to run firmware, as well as a tuning file. Different systems may want to use different firmwares and tuning files, and some firmwares/tunings may not be compatible with other systems. To allow a system to select the correct fimware/tuning, we can read an _SUB from the ACPI. This _SUB can then be used to uniquely identify the system in the firmware/tuning file name. Add a helper function which reads the _SUB, so this can be used by other parts in the future. Add support inside the CS35L41 ASoC driver to read this _SUB, and save it appropriately. Changes since v4: - Rename function Changes since v3: - Fix 32 bit format string warning Changes since v2: - Fix error in function prototype Changes since v1: - Add length validation for SSID String - Rename API - Allocate memory inside API - Use ACPI_HANDLE macro instead of ACPI_COMPANION - Improve error handling Stefan Binding (2): ACPI: utils: Add api to read _SUB from ACPI ASoC: cs35l41: Read System Name from ACPI _SUB to identify firmware drivers/acpi/utils.c | 38 ++++++++++++++++++++++++++++++++++++++ include/linux/acpi.h | 6 ++++++ sound/soc/codecs/cs35l41.c | 24 ++++++++++++++++++++++++ 3 files changed, 68 insertions(+)