Messages in this thread | | | Subject | Re: [RFC PATCH 6/6] drm/i915/gvt: support QEMU getting the dmabuf | From | Gerd Hoffmann <> | Date | Fri, 19 May 2017 10:57:02 +0200 |
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Hi,
> >We could also do it the other way around: Instead of having the kernel returning > > >the plane description userspace could pass it in, and the kernel throws -EINVAL in > > >case it doesn't match due to things having changed meanwhile. > > Or just return a dmabuf based on the current plane ?
If gvt is able to hand out dma-bufs for inactive planes, then yes, we can do this. Have one ioctl where we pass in the plane id, get back a plane description struct, and another where we pass in the plane description struct and get back a dma-buf fd.
cheers, Gerd
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