From patchwork Tue Aug 18 14:06:52 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11722347 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 1B99F1392 for ; Wed, 19 Aug 2020 02:03:31 +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 A37472067C for ; Wed, 19 Aug 2020 02:03:30 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="toYGMXh5" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A37472067C 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 2E32C174E; Wed, 19 Aug 2020 04:02:44 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 2E32C174E DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1597802609; bh=o1djwyXk/r4Vvn8sX694HWa33X6NASZt0Z+0lmspHfU=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=toYGMXh5SZG0zaKhDXebHCSpJ2XB6RZkxbmofyzxfRRonW+3Mc4beB4jO1qZGAnHc pa3E06GIzYfjecElua1soe5HG7E2i7PoYHS5bl4vxeTA/FycnH6TIf1FelHxK0wHwB IAg+rCDll5b5qi+uv0tCQlWc1lShD6K3Kwh1bl1o= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 5CEFFF80114; Wed, 19 Aug 2020 04:01:07 +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 E0374F802A8; Wed, 19 Aug 2020 04:01:04 +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=1.1 required=5.0 tests=DATE_IN_PAST_06_12, SPF_HELO_NONE,SPF_NONE,URIBL_BLOCKED autolearn=disabled version=3.4.0 Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) (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 8077EF80255 for ; Wed, 19 Aug 2020 04:00:56 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 8077EF80255 IronPort-SDR: m0J958BngjbJV2nZon1BB2cGTapmmXhNTB/34uvlxFOG5ff4SvUXXfEWCRu228vYRKJUpQvPTL lqAj1pggZ2xA== X-IronPort-AV: E=McAfee;i="6000,8403,9717"; a="239865530" X-IronPort-AV: E=Sophos;i="5.76,329,1592895600"; d="scan'208";a="239865530" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2020 19:00:55 -0700 IronPort-SDR: HFiMK+71vzfjaqILvMSnlPx1j6EU1tA9p1crHxcCqaYooaBg6YhuRwu297xKIyqYq9zUP5EMNm Kf01NPYtBPSg== X-IronPort-AV: E=Sophos;i="5.76,329,1592895600"; d="scan'208";a="279565085" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2020 19:00:51 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH 3/7] soundwire: slave: add first_interrupt_done status Date: Tue, 18 Aug 2020 22:06:52 +0800 Message-Id: <20200818140656.29014-4-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200818140656.29014-1-yung-chuan.liao@linux.intel.com> References: <20200818140656.29014-1-yung-chuan.liao@linux.intel.com> Cc: pierre-louis.bossart@linux.intel.com, vinod.koul@linaro.org, tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, mengdong.lin@intel.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 Some Slaves report incorrect information in their interrupt status registers after a master/bus reset, track the initial interrupt handling so that quirks can be introduced to filter out incorrect information while keeping interrupts enabled in steady state. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Kai Vehmanen Reviewed-by: Guennadi Liakhovetski Signed-off-by: Bard Liao --- drivers/soundwire/bus.c | 7 ++++++- drivers/soundwire/slave.c | 1 + include/linux/soundwire/sdw.h | 3 +++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index 9e5bcd0dd115..cddf39e3adfc 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1472,6 +1472,9 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave) goto io_err; } + /* at this point all initial interrupt sources were handled */ + slave->first_interrupt_done = true; + /* * Read status again to ensure no new interrupts arrived * while servicing interrupts. @@ -1674,8 +1677,10 @@ void sdw_clear_slave_status(struct sdw_bus *bus, u32 request) if (!slave) continue; - if (slave->status != SDW_SLAVE_UNATTACHED) + if (slave->status != SDW_SLAVE_UNATTACHED) { sdw_modify_slave_status(slave, SDW_SLAVE_UNATTACHED); + slave->first_interrupt_done = false; + } /* keep track of request, used in pm_runtime resume */ slave->unattach_request = request; diff --git a/drivers/soundwire/slave.c b/drivers/soundwire/slave.c index 0839445ee07b..755d43eba63b 100644 --- a/drivers/soundwire/slave.c +++ b/drivers/soundwire/slave.c @@ -57,6 +57,7 @@ static int sdw_slave_add(struct sdw_bus *bus, slave->dev_num = 0; init_completion(&slave->probe_complete); slave->probed = false; + slave->first_interrupt_done = false; mutex_lock(&bus->bus_lock); list_add_tail(&slave->node, &bus->slaves); diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 6d91f2ca20b2..3550ab530c43 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -608,6 +608,8 @@ struct sdw_slave_ops { * between the Master suspending and the codec resuming, and make sure that * when the Master triggered a reset the Slave is properly enumerated and * initialized + * @first_interrupt_done: status flag tracking if the interrupt handling + * for a Slave happens for the first time after enumeration */ struct sdw_slave { struct sdw_slave_id id; @@ -629,6 +631,7 @@ struct sdw_slave { struct completion enumeration_complete; struct completion initialization_complete; u32 unattach_request; + bool first_interrupt_done; }; #define dev_to_sdw_dev(_dev) container_of(_dev, struct sdw_slave, dev)