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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2020-06-30 21:43:53 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2020-07-15 07:40:05 +0300 |
| commit | 4550569bd779f25398503ad5556f8dc7c1f216c2 (patch) | |
| tree | cb6633f440fcacea3f6190d88606d0647f18a550 /Documentation/driver-api/soundwire | |
| parent | 09553140c8d7be7d74e2e39796f644cc085ab273 (diff) | |
| download | linux-4550569bd779f25398503ad5556f8dc7c1f216c2.tar.xz | |
soundwire: stream: add helper to startup/shutdown streams
To handle streams at the dailink level, expose two helpers that will
be called from machine drivers.
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Guennadi Liakhovetski <guennadi.liakhovetski@linux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20200630184356.24939-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Diffstat (limited to 'Documentation/driver-api/soundwire')
| -rw-r--r-- | Documentation/driver-api/soundwire/stream.rst | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/Documentation/driver-api/soundwire/stream.rst b/Documentation/driver-api/soundwire/stream.rst index 1b386076402c..8858cea7bfe0 100644 --- a/Documentation/driver-api/soundwire/stream.rst +++ b/Documentation/driver-api/soundwire/stream.rst @@ -293,6 +293,10 @@ per stream. From ASoC DPCM framework, this stream state maybe linked to int sdw_alloc_stream(char * stream_name); +The SoundWire core provides a sdw_startup_stream() helper function, +typically called during a dailink .startup() callback, which performs +stream allocation and sets the stream pointer for all DAIs +connected to a stream. SDW_STREAM_CONFIGURED ~~~~~~~~~~~~~~~~~~~~~ @@ -509,7 +513,12 @@ In .shutdown() the data structure maintaining stream state are freed up. void sdw_release_stream(struct sdw_stream_runtime * stream); -Not Supported +The SoundWire core provides a sdw_shutdown_stream() helper function, +typically called during a dailink .shutdown() callback, which clears +the stream pointer for all DAIS connected to a stream and releases the +memory allocated for the stream. + + Not Supported ============= 1. A single port with multiple channels supported cannot be used between two |