Iago Toral Quiroga
31f1863ace
The EU limit of 128 GRFs should allow 32 vertex elements of 4 GRFs. However, the maximum allowed value of "Vertex URB Entry Read Length" in SIMD8 is 15. And 15 * 8 = 120 gives us a limit of 30 vertex elements. Because we also need to reserve a vertex buffer to upload VertexIndex/InstanceIndex and another to upload DrawID when needed, we can only expose 28. Cc: "17.2" <mesa-stable@lists.freedesktop.org> Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>