Re: [Qemu-devel] [PATCH v2 7/9] hw/vexpress.c: Instantiate the motherboard CLCD

["Andreas Färber" <afaerber@suse.de>]

Am 24.01.2012 13:39, schrieb Peter Maydell:
> Instantiate the CLCD on the vexpress motherboard as well as one on
> the daughterboard -- the A15 daughterboard does not have a CLCD
> and so relies on the motherboard one.
> 
> At the moment QEMU doesn't provide infrastructure for selecting
> which display device gets to actually show graphics -- the first
> one registered is it. Fortunately this works for the major use
> case (Linux): if the daughterboard has a CLCD it will come first
> and be used, otherwise we fall back to the motherboard CLCD.
> So we don't (currently) need to implement the control register
> which allows software to tell the mux which video output to pass
> through to the outside world.
> 
> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Reviewed-by: Andreas Färber <afaerber@suse.de>

I do hope we find a solution to deal with n displays in the future. I
consider that a post-QOM topic and maybe Anthony's planned DisplayState
refactoring helps with that.

The Origen Board has (provisions for) an LCD in addition to HDMI output,
for instance.

Andreas

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