SoundWire For Linux Preps Support For Multiple Masters

Written by Michael Larabel in Multimedia on 12 August 2018 at 06:08 AM EDT. Add A Comment
Back in Linux 4.16 the SoundWire subsystem was added to the staging area as the MIPI standard for a low-power, two-wire sound bus that can support multiple audio streams and primarily utilized by small audio peripherals like IoT and mobile devices. With the next Linux kernel cycle, the SoundWire support is being improved upon.

The primary addition to SoundWire for the upcoming Linux 4.19 kernel cycle is the introduction of multi-link streaming. Up to now the Linux SoundWire code has just supported a single "master" and one or more "slaves" (codecs). With Linux 4.19, there is support for having multiple masters that share the same reference clock and synchronized in the hardware.

This multi-link support can be used for cases like left and right audio channels being rendered by different masters or other multiple audio channel scenarios.

This is among other work as part of this pull request for SoundWire in the kernel's staging area.
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Michael Larabel

Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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