iris,anv/xe2+: Set tessellation redistribution regions per patch to recommended values.

See also HSDES#14015504893 regarding the region-based tessellation
redistribution feature which allows fine-tuning the number of regions
per patch.  This sets it to the recommended value, since region-based
redistribution is enabled by default.

Reviewed-by: Rohan Garg <rohan.garg@intel.com>
Reviewed-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29562>

src/gallium/drivers/iris/iris_state.c

@@ -5087,6 +5087,9 @@ iris_store_tes_state(const struct intel_device_info *devinfo,
 
    iris_pack_command(GENX(3DSTATE_TE), te_state, te) {
       te.Partitioning = tes_data->partitioning;
+#if GFX_VER >= 20
+      te.NumberOfRegionsPerPatch = 2;
+#endif
       te.OutputTopology = tes_data->output_topology;
       te.TEDomain = tes_data->domain;
       te.TEEnable = true;

src/intel/genxml/gen20.xml

@@ -746,6 +746,7 @@
       <value name="TRI_CW" value="2" />
       <value name="TRI_CCW" value="3" />
     </field>
+    <field name="Number Of Regions Per Patch" start="42" end="43" type="uint" />
     <field name="Partitioning" start="44" end="45" type="uint">
       <value name="INTEGER" value="0" />
       <value name="ODD_FRACTIONAL" value="1" />

src/intel/vulkan/genX_pipeline.c

@@ -1451,6 +1451,10 @@ emit_3dstate_te(struct anv_graphics_pipeline *pipeline)
          /* 1K_TRIANGLES */
          te.LocalBOPAccumulatorThreshold = 1;
 #endif
+
+#if GFX_VER >= 20
+         te.NumberOfRegionsPerPatch = 2;
+#endif
       }
    }
 }