spirv: don't fail on CapabilitySubgroupDispatch if supported

Since only Anv uses the value, I'm only enabling this on anv.

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Fixes: 518693c3ec ("spirv: Handle the SubgroupSize execution mode")
Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13034>

src/compiler/shader_info.h

@@ -91,6 +91,7 @@ struct spirv_supported_capabilities {
    bool subgroup_arithmetic;
    bool subgroup_ballot;
    bool subgroup_basic;
+   bool subgroup_dispatch;
    bool subgroup_quad;
    bool subgroup_shuffle;
    bool subgroup_uniform_control_flow;

src/compiler/spirv/spirv_to_nir.c

@@ -4535,6 +4535,18 @@ vtn_handle_preamble_instruction(struct vtn_builder *b, SpvOp opcode,
          spv_check_supported(amd_shader_ballot, cap);
          break;
 
+      case SpvCapabilitySubgroupDispatch:
+         spv_check_supported(subgroup_dispatch, cap);
+         /* Missing :
+          *   - SpvOpGetKernelLocalSizeForSubgroupCount
+          *   - SpvOpGetKernelMaxNumSubgroups
+          *   - SpvExecutionModeSubgroupsPerWorkgroup
+          *   - SpvExecutionModeSubgroupsPerWorkgroupId
+          */
+         vtn_warn("Not fully supported capability: %s",
+                  spirv_capability_to_string(cap));
+         break;
+
       case SpvCapabilityVariablePointersStorageBuffer:
       case SpvCapabilityVariablePointers:
          spv_check_supported(variable_pointers, cap);

src/intel/vulkan/anv_pipeline.c

@@ -146,6 +146,7 @@ anv_shader_compile_to_nir(struct anv_device *device,
          .subgroup_arithmetic = true,
          .subgroup_basic = true,
          .subgroup_ballot = true,
+         .subgroup_dispatch = true,
          .subgroup_quad = true,
          .subgroup_uniform_control_flow = true,
          .subgroup_shuffle = true,