From mboxrd@z Thu Jan 1 00:00:00 1970 From: Shreyas NC Subject: [PATCH v5 7/9] soundwire: keep track of Masters in a stream Date: Thu, 5 Jul 2018 17:16:34 +0530 Message-ID: <1530791196-15483-8-git-send-email-shreyas.nc@intel.com> References: <1530791196-15483-1-git-send-email-shreyas.nc@intel.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: 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) In-Reply-To: <1530791196-15483-1-git-send-email-shreyas.nc@intel.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: alsa-devel@alsa-project.org Cc: patches.audio@intel.com, gregkh@linuxfoundation.org, pierre-louis.bossart@linux.intel.com, vkoul@kernel.org, Shreyas NC , sanyog.r.kale@intel.com List-Id: alsa-devel@alsa-project.org 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); -- 2.7.4