Re: [PATCH v4 08/13] ASoC: Add SoundWire stream programming interface

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+/**
+ * snd_soc_dai_set_sdw_stream() - Configures a DAI for SDW stream operation
+ * @dai: DAI
+ * @stream: STREAM
+ * @direction: Stream direction(Playback/Capture)
+ * SoundWire subsystem doesn't have a notion of direction and we reuse
+ * the ASoC stream direction to configure sink/source ports.
+ * Playback maps to source on the TX and sink on Rx. Vice-versa for Capture.

this is just confusing...

This should be something like
"use Playback for source ports and Capture for sink ports".

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