From patchwork Fri Jan 15 05:37:35 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Liao, Bard" X-Patchwork-Id: 364685 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9BC08C433E6 for ; Fri, 15 Jan 2021 05:39:44 +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 CAB1E239FC for ; Fri, 15 Jan 2021 05:39:43 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org CAB1E239FC 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 A0E0317A9; Fri, 15 Jan 2021 06:38:51 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz A0E0317A9 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1610689181; bh=xDdaMpsrhypGgPrbwSWXy9SXsnGx822B3kjVDXEQaVc=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=gdejlhExf6kkmKsLbCwxlfRGBmCXof5XDyYaFnkqpnMs3ZoEtam+AbrY1fpUsrMKc BMtsnEX6qXMXqu1/h91JnFNZvdcH+BFn6QMotP4xASwXn1Ej3GPiDRm+qtlUugKGzF IPM+3GwYijAEGBaFzJzsDqLgDIIG2Q7auoeisYdQ= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 5B1DBF8029B; Fri, 15 Jan 2021 06:38:00 +0100 (CET) Received: by alsa1.perex.cz (Postfix, from userid 50401) id 952C0F8026D; Fri, 15 Jan 2021 06:37:54 +0100 (CET) Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) (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 118ADF8016D for ; Fri, 15 Jan 2021 06:37:45 +0100 (CET) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 118ADF8016D IronPort-SDR: 4+Io7e8buTpH9+ypAYvZFZL+fzZ9ANCSBAsMK9KqATX9QaS4ZbFbLmE2+Ew5xYBqgrPJAiIDbv MZU+5Jd9OP4A== X-IronPort-AV: E=McAfee;i="6000,8403,9864"; a="240046286" X-IronPort-AV: E=Sophos;i="5.79,348,1602572400"; d="scan'208";a="240046286" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jan 2021 21:37:44 -0800 IronPort-SDR: /GwyB3ZhDVFPjQQD538msaTKkPOXuHPagHUk6ZCzHmQjuFKgZq1raBT/Ab1QrxHrdW/lyUJA93 sccCqziEf4/Q== X-IronPort-AV: E=Sophos;i="5.79,348,1602572400"; d="scan'208";a="382542441" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Jan 2021 21:37:41 -0800 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH 2/5] soundwire: cadence: add status in dev_dbg 'State change' log Date: Fri, 15 Jan 2021 13:37:35 +0800 Message-Id: <20210115053738.22630-3-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20210115053738.22630-1-yung-chuan.liao@linux.intel.com> References: <20210115053738.22630-1-yung-chuan.liao@linux.intel.com> Cc: vinod.koul@linaro.org, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, pierre-louis.bossart@linux.intel.com, hui.wang@canonical.com, srinivas.kandagatla@linaro.org, jank@cadence.com, sanyog.r.kale@intel.com, rander.wang@linux.intel.com, bard.liao@intel.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" From: Pierre-Louis Bossart The existing debug log only mentions a state change, without providing any details. For integration and stress-tests, it's helpful to see in the dmesg log the reason for the state change. The value is intended for power users and isn't converted as human-readable values. But for the record each device has a 4-bit status: BIT(0): Unattached BIT(1): Attached BIT(2): Alert BIT(3): Reserved (should not happen) Example: [ 121.891288] intel-sdw intel-sdw.0: Slave status change: 0x2 << this shows a Device0 Attached [ 121.891295] soundwire sdw-master-0: Slave attached, programming device number [ 121.891629] soundwire sdw-master-0: SDW Slave Addr: 30025d071101 [ 121.891632] soundwire sdw-master-0: SDW Slave class_id 1, part_id 711, mfg_id 25d, unique_id 0, version 3 [ 121.892011] intel-sdw intel-sdw.0: Msg ignored for Slave 0 [ 121.892013] soundwire sdw-master-0: No more devices to enumerate [ 121.892200] intel-sdw intel-sdw.0: Slave status change: 0x21 << this shows the device now Attached as Device1 and Unattached as Device0, i.e. a successful enumeration. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/cadence_master.c | 19 ++++++++++--------- 1 file changed, 10 insertions(+), 9 deletions(-) diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c index 9fa55164354a..801e1fef59d8 100644 --- a/drivers/soundwire/cadence_master.c +++ b/drivers/soundwire/cadence_master.c @@ -734,21 +734,18 @@ static void cdns_read_response(struct sdw_cdns *cdns) } static int cdns_update_slave_status(struct sdw_cdns *cdns, - u32 slave0, u32 slave1) + u64 slave_intstat) { enum sdw_slave_status status[SDW_MAX_DEVICES + 1]; bool is_slave = false; - u64 slave; u32 mask; int i, set_status; - /* combine the two status */ - slave = ((u64)slave1 << 32) | slave0; memset(status, 0, sizeof(status)); for (i = 0; i <= SDW_MAX_DEVICES; i++) { - mask = (slave >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) & - CDNS_MCP_SLAVE_STATUS_BITS; + mask = (slave_intstat >> (i * CDNS_MCP_SLAVE_STATUS_NUM)) & + CDNS_MCP_SLAVE_STATUS_BITS; if (!mask) continue; @@ -918,13 +915,17 @@ static void cdns_update_slave_status_work(struct work_struct *work) struct sdw_cdns *cdns = container_of(work, struct sdw_cdns, work); u32 slave0, slave1; - - dev_dbg_ratelimited(cdns->dev, "Slave status change\n"); + u64 slave_intstat; slave0 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT0); slave1 = cdns_readl(cdns, CDNS_MCP_SLAVE_INTSTAT1); - cdns_update_slave_status(cdns, slave0, slave1); + /* combine the two status */ + slave_intstat = ((u64)slave1 << 32) | slave0; + + dev_dbg_ratelimited(cdns->dev, "Slave status change: 0x%llx\n", slave_intstat); + + cdns_update_slave_status(cdns, slave_intstat); cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT0, slave0); cdns_writel(cdns, CDNS_MCP_SLAVE_INTSTAT1, slave1);