From patchwork Mon Jun 27 15:51:36 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stefan Binding X-Patchwork-Id: 585298 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 8A9E3C433EF for ; Mon, 27 Jun 2022 15:52:49 +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 E4B4A1652; Mon, 27 Jun 2022 17:51:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz E4B4A1652 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1656345167; bh=q6TRd4wOe7ojqqMr5d4q3r52TtQHg5os3Q8pcNa/lGU=; h=From:To:Subject:Date:Cc:List-Id:List-Unsubscribe:List-Archive: List-Post:List-Help:List-Subscribe:From; b=j4ifJvgwqkolGClqD8bTV7uRBtRQhNunACd4Xy9QtO+AJ5QPzD2qGFOTBn27QqcIl VXp03F1cuqKODilZBboAyXZ3k5TrEdIfymNT72jEzOMqRxvxpYRF0UQHCQq5hW6NDO SCIRrT8DB9vLfCUdExLHKuU4lwQEeKC4tunsKowk= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 72A8EF8028B; Mon, 27 Jun 2022 17:51:56 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 1D925F804F1; Mon, 27 Jun 2022 17:51:55 +0200 (CEST) Received: from mx0b-001ae601.pphosted.com (mx0a-001ae601.pphosted.com [67.231.149.25]) (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 B4674F80128 for ; Mon, 27 Jun 2022 17:51:47 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz B4674F80128 Authentication-Results: alsa1.perex.cz; dkim=pass (2048-bit key) header.d=cirrus.com header.i=@cirrus.com header.b="TaBQ7c1K" Received: from pps.filterd (m0077473.ppops.net [127.0.0.1]) by mx0a-001ae601.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 25RCSNNL017521; Mon, 27 Jun 2022 10:51:44 -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=zKVjs6FUp3AtesiTh6VnlwcBjsKTbJMxizo235GYlwI=; b=TaBQ7c1K+VqNMwl6+aPYkIIBc7bXUx9RgS0BGEfomz62nj4LDSlkcyPDLC7leqZ4BpK6 7WXjyZJath2KNL7Gddsv/wAJAFFhazxR/TgEarVi4qvUMXU8+Q4oksZ08ayAhlSaE4U7 2f4PqJLzk/3HjQEf6WR/wfWf+zxr27+pA59lFeBrj5e8k4yWupWnr3UzslqT4BVZup7Y T+uXnB1/qHAEDEPmE08mRHWbYoJqbj+9pWx2EPkhXmrQQRtWWSnKvhWQlsl2lF26gpxm f0WB71NJZBmdnNan8D/3wbwPnH0e01FM591xb6wSY7G8mTYnvJIxA6KOWeQgIuUVDL9N 1A== Received: from ediex02.ad.cirrus.com ([84.19.233.68]) by mx0a-001ae601.pphosted.com (PPS) with ESMTPS id 3gwys2k0ug-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT); Mon, 27 Jun 2022 10:51:44 -0500 Received: from EDIEX01.ad.cirrus.com (198.61.84.80) by EDIEX02.ad.cirrus.com (198.61.84.81) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.28; Mon, 27 Jun 2022 16:51:42 +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; Mon, 27 Jun 2022 16:51:42 +0100 Received: from sbinding-cirrus-dsktp.ad.cirrus.com (unknown [198.90.238.163]) by ediswmail.ad.cirrus.com (Postfix) with ESMTP id 63666458; Mon, 27 Jun 2022 15:51:41 +0000 (UTC) From: Stefan Binding To: "Rafael J . Wysocki" , Len Brown , Mark Brown , Liam Girdwood Subject: [PATCH v3 0/2] Read _SUB from ACPI to be able to identify firmware Date: Mon, 27 Jun 2022 16:51:36 +0100 Message-ID: <20220627155138.807420-1-sbinding@opensource.cirrus.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 X-Proofpoint-ORIG-GUID: 0ztQ70rIQ642H72ACesiiiETc-8cUU7t X-Proofpoint-GUID: 0ztQ70rIQ642H72ACesiiiETc-8cUU7t 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 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(+)