Re: [PATCH v2 7/7] ASoC: dt-bindings: imx-rpmsg: Add binding doc for rpmsg machine driver

On Thu, Feb 18, 2021 at 1:23 AM Shengjiu Wang [off-list ref] wrote:

On Thu, Feb 11, 2021 at 6:18 AM Rob Herring [off-list ref] wrote:

quoted

On Sun, Feb 07, 2021 at 06:23:55PM +0800, Shengjiu Wang wrote:

quoted

Imx-rpmsg is a new added machine driver for supporting audio on Cortex-M
core. The Cortex-M core will control the audio interface, DMA and audio
codec, setup the pipeline, the audio driver on Cortex-A core side is just
to communitcate with M core, it is a virtual sound card and don't touch
the hardware.

I don't understand why there are 2 nodes for this other than you happen
to want to split this into 2 Linux drivers. It's 1 h/w thing.

This one is for the sound card machine driver.  Another one is
for the sound card cpu dai driver. so there are 2 nodes.

You are explaining this to me in terms of drivers. Explain it in terms
of h/w blocks.

Rob