[PATCH 0/1] Support per-head resolutions with virtio-gpu

[Andrew Keesler]

In 454f4b0f, we started down the path of supporting separate
configurations per display head (e.g., you have 2 heads - one with
EDID name "AAA" and the other with EDID name "BBB").

In this change, we add resolution to this configuration surface (e.g.,
you have 2 heads - one with resolution 111x222 and the other with
resolution 333x444).

  -display vnc=localhost:0,id=aaa,display=vga,head=0 \
  -display vnc=localhost:1,id=bbb,display=vga,head=1 \
  -device '{"driver":"virtio-vga",
            "max_outputs":2,
            "id":"vga",
            "outputs":[
              {
                 "name":"AAA",
                 "xres":111,
                 "yres":222
              },
              {
                 "name":"BBB",
                 "xres":333,
                 "yres":444
              }
            ]}'

If no virtio_gpu_base_conf.outputs are provided, then
virtio_gpu_base_conf.xres/virtio_gpu_base_conf.yres will still be
respected, preserving backwards compatibility.

Otherwise, if any virtio_gpu_base_conf.outputs are provided, then
virtio_gpu_base_conf.outputs.xres/virtio_gpu_base_conf.outputs.yres
will take precedence. In this case,
virtio_gpu_base_conf.outputs.xres/virtio_gpu_base_conf.outputs.yres
must be non-zero.

Andrew Keesler (1):
  hw/display: Support per-head resolutions with virtio-gpu

 hw/display/virtio-gpu-base.c | 12 ++++++++++++
 qapi/virtio.json             |  6 +++++-
 2 files changed, 17 insertions(+), 1 deletion(-)

-- 
2.50.0.727.gbf7dc18ff4-goog