Re: [Xen-devel] Regarding hdmi sharing in xen

[Andrii Anisov <andrii_anisov@xxxxxxxx>]

Dear George,

First I would state terms as following:
* Sharing HW - using the same hardware by different domains using PV 
drivers, so actually one domain accessing the HW directly and serves 
other domains.
* Assigning HW - providing access to some particular HW for some 
particular domain. E.g. peripherals by default are assigned to Dom0, but 
using Passthrough some could be assigned to DomU.
On 19.07.17 07:41, George John wrote:
> Our plan is to run Linux as Dom0 and Android as DomU. The Linux 
> portion will be having 1 HDMI display and the Android porion will be 
> having 1 HDMI.
> Can we share the DU and use the HDMI port as it is in the guests?
IIRC last year it was shown a setup with Salvator-X board, where one 
HDMI display was *assigned* to Linux (Dom0) and one HDMI display was 
*assigned* to Android. So such setup is technically feasible.
If a domain has assigned a display to use solely, it can share that 
display to other domains using displif protocol [1].
[1] 
https://lists.xenproject.org/archives/html/xen-devel/2017-04/msg00470.html
--

*Andrii Anisov*



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