From patchwork Tue Aug 18 14:06:53 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bard Liao X-Patchwork-Id: 11722351 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 69B31138C for ; Wed, 19 Aug 2020 02:04:30 +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 F264B2067C for ; Wed, 19 Aug 2020 02:04:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=alsa-project.org header.i=@alsa-project.org header.b="JansJcL7" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org F264B2067C 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 77C1617E8; Wed, 19 Aug 2020 04:03:43 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 77C1617E8 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1597802668; bh=iDCUY729GppLoSP/SJR0ja71cuSCj5U8IvbvjTFq+E4=; h=From:To:Subject:Date:In-Reply-To:References:Cc:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=JansJcL7zV5w0aOxJYEq2ySFATNPaQR1kjxW2OFsuwro6bqMjYhkUC7D9oPIi4Ddl OfYosGcxTYyShpp7YljhYqWyTVjljgXGaKegbVseKzQ5iuQh+htOdAFCal3vAtLSwx QaR/Q25LFSue06BMGm1diMigQHL1x6zvdYJHqhFg= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id A5835F802E3; Wed, 19 Aug 2020 04:01:12 +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 8B1ACF802A9; Wed, 19 Aug 2020 04:01:06 +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 E8233F80114 for ; Wed, 19 Aug 2020 04:00:59 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz E8233F80114 IronPort-SDR: SwFV2LU66dm7zeJcme2kHP9uPYFHxfhUyzrz8vvMjQQrAEvK995z76jKeIXOHC57F9laodzV1a k2wizZIvtJbw== X-IronPort-AV: E=McAfee;i="6000,8403,9717"; a="239865543" X-IronPort-AV: E=Sophos;i="5.76,329,1592895600"; d="scan'208";a="239865543" 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 19:00:59 -0700 IronPort-SDR: 8O9wl9OXXY3v7qbKIzVtJsDElyQFSs8nf7Iuv0+gLmQvvXHWl9WLzywcFtRIyoY7XF3WuzsiR+ gBbt8hu6lQ9Q== X-IronPort-AV: E=Sophos;i="5.76,329,1592895600"; d="scan'208";a="279565098" 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 19:00:55 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH 4/7] soundwire: bus: use quirk to filter out invalid parity errors Date: Tue, 18 Aug 2020 22:06:53 +0800 Message-Id: <20200818140656.29014-5-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 If a Slave device reports with a quirk that its initial parity check may be incorrect, filter it but keep the parity checks active 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 | 8 +++++++- include/linux/soundwire/sdw.h | 4 ++++ 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/soundwire/bus.c b/drivers/soundwire/bus.c index cddf39e3adfc..869290a8db40 100644 --- a/drivers/soundwire/bus.c +++ b/drivers/soundwire/bus.c @@ -1362,6 +1362,8 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave) unsigned long port; bool slave_notify = false; u8 buf, buf2[2], _buf, _buf2[2]; + bool parity_check; + bool parity_quirk; sdw_modify_slave_status(slave, SDW_SLAVE_ALERT); @@ -1394,7 +1396,11 @@ static int sdw_handle_slave_alerts(struct sdw_slave *slave) * interrupt */ if (buf & SDW_SCP_INT1_PARITY) { - if (slave->prop.scp_int1_mask & SDW_SCP_INT1_PARITY) + parity_check = slave->prop.scp_int1_mask & SDW_SCP_INT1_PARITY; + parity_quirk = !slave->first_interrupt_done && + (slave->prop.quirks & SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY); + + if (parity_check && !parity_quirk) dev_err(&slave->dev, "Parity error detected\n"); clear |= SDW_SCP_INT1_PARITY; } diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 3550ab530c43..19bec6e4bbb6 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -356,6 +356,7 @@ struct sdw_dpn_prop { * @src_dpn_prop: Source Data Port N properties * @sink_dpn_prop: Sink Data Port N properties * @scp_int1_mask: SCP_INT1_MASK desired settings + * @quirks: bitmask identifying deltas from the MIPI specification */ struct sdw_slave_prop { u32 mipi_revision; @@ -378,8 +379,11 @@ struct sdw_slave_prop { struct sdw_dpn_prop *src_dpn_prop; struct sdw_dpn_prop *sink_dpn_prop; u8 scp_int1_mask; + u32 quirks; }; +#define SDW_SLAVE_QUIRKS_INVALID_INITIAL_PARITY BIT(0) + /** * struct sdw_master_prop - Master properties * @revision: MIPI spec version of the implementation