From patchwork Thu Jul 5 11:46:34 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Shreyas NC X-Patchwork-Id: 10508809 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2C88060116 for ; Thu, 5 Jul 2018 11:49:10 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1B9B928FC1 for ; Thu, 5 Jul 2018 11:49:10 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0F78128FC5; Thu, 5 Jul 2018 11:49:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00, MAILING_LIST_MULTI, RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 54D0C28FC1 for ; Thu, 5 Jul 2018 11:49:09 +0000 (UTC) Received: from alsa0.perex.cz (localhost [127.0.0.1]) by alsa0.perex.cz (Postfix) with ESMTP id 9225F26774A; Thu, 5 Jul 2018 13:48:45 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id F1F6E267714; Thu, 5 Jul 2018 13:48:37 +0200 (CEST) Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by alsa0.perex.cz (Postfix) with ESMTP id A92DB2676EC for ; Thu, 5 Jul 2018 13:48:35 +0200 (CEST) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Jul 2018 04:48:33 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.51,312,1526367600"; d="scan'208";a="68875366" Received: from snc-desk.iind.intel.com ([10.223.96.118]) by fmsmga004.fm.intel.com with ESMTP; 05 Jul 2018 04:48:31 -0700 From: Shreyas NC To: alsa-devel@alsa-project.org Date: Thu, 5 Jul 2018 17:16:34 +0530 Message-Id: <1530791196-15483-8-git-send-email-shreyas.nc@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1530791196-15483-1-git-send-email-shreyas.nc@intel.com> References: <1530791196-15483-1-git-send-email-shreyas.nc@intel.com> Cc: patches.audio@intel.com, gregkh@linuxfoundation.org, pierre-louis.bossart@linux.intel.com, vkoul@kernel.org, Shreyas NC , sanyog.r.kale@intel.com Subject: [alsa-devel] [PATCH v5 7/9] soundwire: keep track of Masters in a stream X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP A multi link bankswitch can be done if the hardware supports and the stream is handled by multiple Master(s). This preparatory patch adds support to track m_rt in a stream. Signed-off-by: Shreyas NC --- drivers/soundwire/stream.c | 4 ++++ include/linux/soundwire/sdw.h | 2 ++ 2 files changed, 6 insertions(+) diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index c1a2c3d..71d7e0b 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -759,6 +759,7 @@ struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name) stream->name = stream_name; INIT_LIST_HEAD(&stream->master_list); stream->state = SDW_STREAM_ALLOCATED; + stream->m_rt_count = 0; return stream; } @@ -968,6 +969,7 @@ int sdw_stream_remove_master(struct sdw_bus *bus, if (list_empty(&stream->master_list)) stream->state = SDW_STREAM_RELEASED; + stream->m_rt_count--; mutex_unlock(&bus->bus_lock); return 0; @@ -1166,6 +1168,8 @@ int sdw_stream_add_master(struct sdw_bus *bus, if (ret) goto stream_error; + stream->m_rt_count++; + goto unlock; stream_error: diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index 03df709..214e146 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -771,6 +771,7 @@ struct sdw_stream_params { * @master_list: List of Master runtime(s) in this stream. * master_list can contain only one m_rt per Master instance * for a stream + * @m_rt_count: Count of Master runtime(s) in this stream */ struct sdw_stream_runtime { char *name; @@ -778,6 +779,7 @@ struct sdw_stream_runtime { enum sdw_stream_state state; enum sdw_stream_type type; struct list_head master_list; + int m_rt_count; }; struct sdw_stream_runtime *sdw_alloc_stream(char *stream_name);