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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>
hifive-unleashed-5.1
Shreyas NC 2018-07-27 14:44:15 +05:30 committed by Vinod Koul
parent ce6e74d008
commit 9b5c132a1e
2 changed files with 3 additions and 0 deletions
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1
drivers/soundwire/stream.c
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@ -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;
}

2
include/linux/soundwire/sdw.h
View File

@ -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);