Re: [Qemu-devel] [RFC PATCH spice v2 1/2] QXL interface: add functions to identify monitors in the guest

[Gerd Hoffmann]

  Hi,

> > I can see that it simplifies the logic in spice-server if we have a
> > single function call instead of two.  So we could deprecate
> > spice_qxl_set_max_monitors() in favour of your
> > spice_qxl_set_device_info() variant.
> > 
> > spice_qxl_set_max_monitors() would then basically do this:
> > 
> >     spice_qxl_set_max_monitors(qxl, max)
> >     {
> >         spice_qxl_set_device_info(qxl, NULL, 0, max);
> >     }
> 
> I can't actually do this, it does the wrong thing for the one-channel-
> per-head (virtio-gpu) case. For that case it would send all
> device_display_ids to 0 on all interfaces, but they need to be
> different numbers.

Well, qemu calls spice_qxl_set_max_monitors() only in case there are
multiple monitors in one channel, i.e. qxl.

cheers,
  Gerd