From patchwork Tue Oct 22 23:48:06 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre-Louis Bossart X-Patchwork-Id: 11205499 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 2134E1515 for ; Tue, 22 Oct 2019 23:50:39 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id A8D9A2075A for ; Tue, 22 Oct 2019 23:50:38 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="Etw9DcbW" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A8D9A2075A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=alsa-devel-bounces@alsa-project.org 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 3E1D0166F; Wed, 23 Oct 2019 01:49:46 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 3E1D0166F DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1571788236; bh=ibudfzoq7VzlGPTZiPwTVyzypryZhou6pCVksNiY6Ys=; h=From:To:Date:In-Reply-To:References:Cc:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=Etw9DcbWeaSvnC1ZIhjbdQLZnt7x7LW3/8G3OIOQ3tjV+R2dO957XvZycxvxGmbEa 2ey869nBf1c/w1aoEnUGdma0Xl8S3OjLCq0jIhUs7/ezlSbUd6WEFH4eVOyZhod6Sv B8ucJp0pVwI8FteFg46ECZue6KzaiKAgCE9v2KVA= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 63B8FF8058C; Wed, 23 Oct 2019 01:48:52 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 993CDF80367; Wed, 23 Oct 2019 01:48:50 +0200 (CEST) X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on alsa1.perex.cz X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=SPF_HELO_NONE,SPF_NONE, URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) (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 C100BF802FB for ; Wed, 23 Oct 2019 01:48:47 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz C100BF802FB X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Oct 2019 16:48:46 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,218,1569308400"; d="scan'208";a="399211295" Received: from srajamoh-mobl2.amr.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.251.20.203]) by fmsmga006.fm.intel.com with ESMTP; 22 Oct 2019 16:48:43 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Date: Tue, 22 Oct 2019 18:48:06 -0500 Message-Id: <20191022234808.17432-2-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191022234808.17432-1-pierre-louis.bossart@linux.intel.com> References: <20191022234808.17432-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Cc: Pierre-Louis Bossart , tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, Ranjani Sridharan , vkoul@kernel.org, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, slawomir.blauciak@intel.com, Sanyog Kale , Bard liao , Rander Wang Subject: [alsa-devel] [PATCH 1/3] soundwire: remove bitfield for unique_id, use u8 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" There is no good reason why the unique_id needs to be stored as 4 bits. The code will work without changes with a u8 since all values are already filtered while parsing the ACPI tables and Slave devID registers. Use u8 representation. This will allow us to encode a "IGNORE_UNIQUE_ID" value to account for firmware/BIOS creativity. Signed-off-by: Pierre-Louis Bossart --- include/linux/soundwire/sdw.h | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 688b40e65c89..28745b9ba279 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -403,6 +403,8 @@ int sdw_slave_read_prop(struct sdw_slave *slave); * SDW Slave Structures and APIs */ +#define SDW_IGNORED_UNIQUE_ID 0xFF + /** * struct sdw_slave_id - Slave ID * @mfg_id: MIPI Manufacturer ID @@ -418,7 +420,7 @@ struct sdw_slave_id { __u16 mfg_id; __u16 part_id; __u8 class_id; - __u8 unique_id:4; + __u8 unique_id; __u8 sdw_version:4; };