Hi

On Fri, Mar 5, 2021 at 4:05 AM Rob Herring [off-list ref] wrote:

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

quoted

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.

Yes, there is only 1 h/w block, which is (MU) message unit

As the sound card needs a cpu dai node and sound card node,
so from the driver's perspective, I use two nodes.

Seems It is hard to only use one node for my case.
or do you have any suggestions?

Best regards
Wang shengjiu