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authorShreyas NC <shreyas.nc@intel.com>2018-07-27 11:14:15 +0200
committerVinod Koul <vkoul@kernel.org>2018-08-27 06:19:48 +0200
commit9b5c132a1ec98895fe40ba73a19e0a17293122e5 (patch)
treeb200a84e1f1e305290c412510c9c40a03a135be8
parentsoundwire: Add support for multi link bank switch (diff)
downloadlinux-9b5c132a1ec98895fe40ba73a19e0a17293122e5.tar.xz
linux-9b5c132a1ec98895fe40ba73a19e0a17293122e5.zip
soundwire: keep track of Masters in a stream
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. Modifying m_rt_count and usage is added as part of the next patch. Signed-off-by: Shreyas NC <shreyas.nc@intel.com> Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Signed-off-by: Vinod Koul <vkoul@kernel.org>
-rw-r--r--drivers/soundwire/stream.c1
-rw-r--r--include/linux/soundwire/sdw.h2
2 files changed, 3 insertions, 0 deletions
diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index 3d98f20cbd6a..bd879b1a76c8 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -865,6 +865,7 @@ 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;
}
diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h
index c6aa2bf847c7..df313913e856 100644
--- a/include/linux/soundwire/sdw.h
+++ b/include/linux/soundwire/sdw.h
@@ -775,6 +775,7 @@ 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;
@@ -782,6 +783,7 @@ 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);