driver-api/soundwire/stream.rst

20 interface. Below are some ways a stream can be represented in SoundWire.
57 Slaves are using single port. ::
79 Master. Both of the L and R channels are received by two different
80 Slaves. Master and both Slaves are using single port handling
131 receiving one channel. Both Masters and both Slaves are using single port. ::
197 framework(ASoC DPCM) guarantees that stream operations on a card are
206 typically configure which of the slots are used. For Example 4, the
230 done for each of the stream allocated/released on Bus. Following are the
254 ``SDW_STREAM_DISABLED`` are only relevant when then INFO_PAUSE flag is
280   (2) The resources required for holding stream runtime information are
285 After all above operations are successful, stream state is set to
308       state are updated here. This includes stream parameters, Master(s)
315 After all above operations are successful, stream state is set to
341   (0) Steps 1 and 2 are omitted in the case of a resume operation,
345       are computed based on current stream as well as already active
349   (2) Transport and port parameters of all Master(s) and Slave(s) port(s) are
353   (3) Computed Bus and transport parameters are programmed in Master(s) and
355       alternate bank (bank currently unused). Port(s) are enabled for the
359   (4) Once all the values are programmed, Bus initiates switch to alternate
362   (5) Ports of Master(s) and Slave(s) for current stream are prepared by
365 After all above operations are successful, stream state is set to
382 Enable state of stream. The data port(s) are enabled upon entering this state.
385   (1) All the values computed in SDW_STREAM_PREPARED state are programmed
389   (2) All the Master(s) and Slave(s) port(s) for the current stream are
393   (3) Once all the values are programmed, Bus initiates switch to alternate
395       associated with current stream are enabled.
397 After all above operations are successful, stream state is set to
411 Disable state of stream. The data port(s) are disabled upon exiting this state.
414   (1) All the Master(s) and Slave(s) port(s) for the current stream are
418   (2) All the current configuration of Bus and active stream(s) are programmed
421   (3) Once all the values are programmed, Bus initiates switch to alternate
423       with current stream are disabled.
425 After all above operations are successful, stream state is set to
451   (1) All the port(s) of Master(s) and Slave(s) for current stream are
458 After all above operations are successful, stream state is set to
492 After all above operations are successful, stream state is set to
510 In .shutdown() the data structure maintaining stream state are freed up.