src: dai-zephyr: copy data to all available sinks #9200
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dnikodem
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In the case where the copier has more than one output and, additionally, we will be using a pin other than pin 0 (for example, when we want to copy data from pin 1 of a gateway-type copier to the next pipeline), it is necessary to copy data in playback path from the source to the output for all possible sinks. Signed-off-by: Damian Nikodem <[email protected]>
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dnikodem
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dai_common_copy() calculates the amount of bytes that should be copied. For playback case that is line 1525. Seems that code should be modified to also check if there is free space in all sink buffers, current version only checks for space available in source and free in dma_buffer.
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| sink = container_of(sink_list, struct comp_buffer, source_list); | ||
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| if (sink == dd->dma_buffer) |
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dma_buffer is not on the list of sinks, so this condition is always false. However, maybe it is OK to leave it as is or replace with assert() "just in case" someone add dma_buffer to sink list in some future refactoring.
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| if (sink_dev && sink_dev->state == COMP_STATE_ACTIVE) { |
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Those additional sinks are (always?) connected to other pipelines. And so some other pipelines might be responsible to set buffer stream params in .params() handler of components connected to those sinks. For unknown reason checking sink_dev->state == COMP_STATE_ACTIVE is not enough, I recently observed problems with multiple-pause-resume test on my draft PR and have to fix it like this: 4ebd807.
Frame format of uninitialized buffer is 0 which is treated as SOF_IPC_FRAME_S16_LE. If test uses 24 or 32 bit formats that could lead to wrong consume/produce and invalidate/writeback values.
The problem could be fixed in a separate PR, I just comment it here as your PR adds new place there the fix should be applied.
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Sure, thanks for review. I'll take a look at your comments and get back with answers
In the case where the copier has more than one output and, additionally, we will be using a pin other than pin 0 (for example, when we want to copy data from pin 1 of a gateway-type copier to the next pipeline), it is necessary to copy data in playback path from the source to the output for all possible sinks.