Hi On Fri, Mar 5, 2021 at 4:05 AM Rob Herring <robh@xxxxxxxxxx> wrote: > > On Thu, Feb 18, 2021 at 1:23 AM Shengjiu Wang <shengjiu.wang@xxxxxxxxx> wrote: > > > > On Thu, Feb 11, 2021 at 6:18 AM Rob Herring <robh@xxxxxxxxxx> wrote: > > > > > > On Sun, Feb 07, 2021 at 06:23:55PM +0800, Shengjiu Wang wrote: > > > > 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
