Tile-4 is supported by Intel DG2. Support it could benefit performance.

Tracked-On: OAM-123143
Signed-off-by: HeYue <yue.he@intel.com>

...which allows setting attach->peer2peer without implementing dynamic
importer_ops.

Tracked-On: OAM-123143
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>

TODO: We must always use DMA addresses for the following two reasons:

1. By design we are not allowed to access the struct page backing a
   scatter list, especially when config DMABUF_DEBUG is turned on in
   which case the addresses will be mangled by the core.
2. DMA addresses are required for dGPU local memory sharing between
   host and guest.

Tracked-On: OAM-123143
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>

This feature is mainly for dGPU local memory sharing between host and
guest.  Presence of this capability means that the virtio-GPU backend is
expecting local memory buffers for scan-out.

Tracked-On: OAM-123143
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>

Set allow_peer2peer flag when capability VIRTIO_GPU_F_ALLOW_P2P is
exposed by the device back-end.  This allows other devices to share
memory residing in device local memory.

Tracked-On: OAM-123143
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>

Tracked-On: OAM-123143
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>

Sprite planes of physical pipe are exposed to guest through
virtio gpu, and all the supported format and modifier and rotation
capabilities are transferred to frontend driver, so that user space
graphic software could easily utilize them to avoid unnecessary
gpu computing resource waste.

This patch also includes alpha and pixel blend mode property support.

Tracked-On: OAM-114060
Signed-off-by: hangliu1 <hang1.liu@intel.com>
Signed-off-by: Xue.Bosheng <bosheng.xue@intel.com>
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>

Add multiple gem obj backs for virtio gpu framebuffer to support multiple
planer for some pixel format.

Test-done:
- GAS;
- iGPU VF + virtio-GPU;
- iGPU VF + dGPU passthrough.

Tracked-On: OAM-124054
Signed-off-by: hangliu1 <hang1.liu@intel.com>
Signed-off-by: HeYue <yue.he@intel.com>
Signed-off-by: Weifeng Liu <weifeng.liu@intel.com>