Re: [RFC] dt-bindings: mailbox: add doorbell support to ARM MHU

[Jassi Brar]

On Wed, Jun 3, 2020 at 1:31 PM Sudeep Holla <sudeep.holla@xxxxxxx> wrote:
>
> > >
> > H/W is actually fine :)   Its just that the driver is written to
> > _also_ support a platform (my original) that doesn't have shmem and
> > need to pass data via 32bit registers.
> > Frankly, I am not against the doorbell mode, I am against implementing
> > two modes in a driver. If it really helped (note the past tense) the
> > SCMI, we could implement the driver only in doorbell mode but
> > unfortunately SCMI would still be _broken_ for non-doorbell
> > controllers.
>
> Should be fine as the specification is designed to work with only shmem
> for any data transfer and mailbox is just a signal mechanism. I won't
> be too worried about that.
>
Please clarify how it will work on, say again, rockchip platform with shmem.

thanks.