Messages in this thread | | | Date | Thu, 9 Nov 2017 13:54:57 -0700 | From | Alex Williamson <> | Subject | Re: [PATCH v17 5/6] vfio: ABI for mdev display dma-buf operation |
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On Thu, 9 Nov 2017 19:35:14 +0100 Gerd Hoffmann <kraxel@redhat.com> wrote:
> Hi, > > > struct vfio_device_gfx_plane_info lacks the head field we've been > > discussing. Thanks, > > Adding multihead support turned out to not be that easy. There are > corner cases like a single framebuffer spawning both heads. Also it > would be useful to somehow hint to the guest which heads it should use. > > In short: Proper multihead support is more complex than just adding a > head field for later use. So in a short private discussion with Tina we > came to the conclusion that it will be better add multihead support to > the API when the first driver wants use it, so we can actually test the > interface and make sure we didn't miss anything. Adding a incomplete > multihead API now doesn't help anybody.
Do you think we can enable multi-head and preserve backwards compatibility within this API proposed here? Thanks,
Alex
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