drm: xlnx: zynqmp_dpsub: Expose plane ordering to userspace

While the DPSUB has a fixed plane order, it still makes sense to expose
it to userspace to avoid hardcoding assumptions. Do so by adding an
immutable zpos property to planes.

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
This commit is contained in:
Laurent Pinchart 2021-03-07 02:56:58 +02:00
commit 8c772f0b2b