[alsa-devel] [RFC PATCH 1/2] ASoC: simple-card: add support for bclk_ratio

[Sven Van Asbroeck]

On Tue, Feb 26, 2019 at 10:45 AM Russell King - ARM Linux admin
<linux at armlinux.org.uk> wrote:
>
>
> I can't see how you'd extend a single I2S setup to support multi-
> channel audio without either adding more I2S data lines or adding
> additional WS signals (so making it e.g., a binary number).
>

That's a very good point too. In light of this, I struggle to understand how
the ssl_ssi can specify this:

static struct snd_soc_dai_driver fsl_ssi_dai_template = {
        .playback = {
                .stream_name = "CPU-Playback",
                .channels_min = 1,
                .channels_max = 32,
        },

There is talk in the manual about "network mode", which could work by changing
the LRCLK only at the first slot - thereby allowing clients to receive all
slots just by counting, as long as they know the slot size?

LRCLK   _____/-----------------\_____/---------
DATA    SLOT1|SLOT2|SLOT3|SLOT4|SLOT1

Well idk, I'm way out of my depth here.