[vbox-dev] How to access host vertical blanking intervals

Steve Longerbeam slongerbeam at gmail.com
Fri Aug 31 20:54:41 GMT 2018

Hello VBOX developers,

I recently contributed a patch to in-kernel vboxvideo DRM driver which
adds support for page flip. However the implementation does not
make any attempt to sync page flip with host vertical blanking
interval, so it's possible a DRM page flip will result in tearing artifacts.

So is there a call that can be made into the hypervisor that would allow
receiving an event when host display has entered a vblank interval?
Something in the VBOX Main API perhaps?

Thanks in advance,

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