Re: [PATCH v1 1/4] mhi_bus: core: Add support for MHI host interface

[Sujeev Dias]

Hi Pavel


On 05/03/2018 12:21 PM, Pavel Machek wrote:
> Hi!
>
> > MHI Host Interface is a communication protocol to be used by the host
> > to control and communcate with modem over a high speed peripheral bus.
> > This module will allow host to communicate with external devices that
> > support MHI protocol.
> I have Motorola Droid 4 cellphone here, with Qualcomm GSM modem. But
> it talks over serial line and USB. I guess MHI is not applicable to my
> hardware?
MHI is for PCIe based modem, in any case I can't comment about 
commercial devices.
> > +MHI Devices
> > +-----------
> > +Logical device that bind to maximum of two physical MHI channels. Once MHI is in
> > +powered on state, each supported channel by controller will be allocated as a
> > +mhi_device.
> What kind of protocol is running over MHI? I guess its not AT
> commands. QMI? Or something entirely different?
All modem services between external modem and host go over MHI.
So QMI, AT, all other data and control services go thru MHI host driver.
> 									Pavel

Thanks
Sujeev

--
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project