Re: [PATCH] ASoC: brcm: Add DSL/PON SoC audio driver

[Mark Brown]

On Tue, Mar 10, 2020 at 08:49:08AM -0700, Kevin Li wrote:

> > This is not how any of this is supposed to work, it's unlikely to work
> > well with other devices.  If the device supports both master and slave
> > operation then you should let the machine driver pick if the SoC or the
> > CODEC is master via set_fmt(), randomly varying this at runtime is not
> > going to be helpful.

> Maybe the name "master/slave" is confusing, these names come from internal
> chip signals and do not represent the state of the i2s bus master. Our SoC
> supports only master mode in the i2s bus. The Rx and Tx block each have an
> independent bit to indicate if it is generating the clock for the i2s bus.
> The i2s bus clocks need to be generated from either the Rx block or the Tx
> block, but not both.

Right, at the very least this needs to be better documented in the code.

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