Support dynamic quantization for u2

Author: xuchen-intel

src/plugins/intel_cpu/src/nodes/executors/dnnl/dnnl_fullyconnected_primitive.cpp

@@ -176,11 +176,15 @@ static bool useDynamicQuantizationImpl(size_t dqGroupSize,
     // For dynamic quantization, VNNI accumulation requires weight to be unsigned.
     // To support dynamic quantization with weights symmetrically quantized as i8/i4
     // w/o zero-point, we will transform weight to u8/u4 weight with zp 128/8.
-    if (none_of(weightsDesc->getPrecision(), ov::element::u8, ov::element::u4) &&
+    if (none_of(weightsDesc->getPrecision(), ov::element::u8, ov::element::u4, ov::element::u2) &&
         !((any_of(weightsDesc->getPrecision(), ov::element::i8, ov::element::i4) && !zpPtr))) {
         return false;
     }
-    if (zpPtr && none_of(zpPtr->getDesc().getPrecision(), ov::element::u8, ov::element::u4, ov::element::dynamic)) {
+    if (zpPtr && none_of(zpPtr->getDesc().getPrecision(),
+                         ov::element::u8,
+                         ov::element::u4,
+                         ov::element::u2,
+                         ov::element::dynamic)) {
         return false;
     }
 

src/plugins/intel_cpu/tests/functional/custom/subgraph_tests/src/x64/matmul_weights_decompression.cpp

@@ -281,6 +281,21 @@ INSTANTIATE_TEST_SUITE_P(smoke_MatMulCompressedWeights_non_default_dyn_quant_gro
                                             ::testing::Values(true)),
                          MatmulWeightsDecompression::getTestCaseName);
 
+INSTANTIATE_TEST_SUITE_P(smoke_MatMulCompressedWeights_non_default_dyn_quant_group_sizes_u2,
+                         MatmulWeightsDecompression,
+                         ::testing::Combine(::testing::ValuesIn(input_shapes_basic_u2),
+                                            ::testing::Values(ov::element::u2),
+                                            ::testing::ValuesIn(decompression_precisions),
+                                            ::testing::Values(ov::element::dynamic),
+                                            ::testing::Values(true),
+                                            ::testing::Values(DecompressionType::scalar),
+                                            ::testing::Values(DecompressionType::scalar),
+                                            ::testing::Values(false),
+                                            ::testing::ValuesIn(filter_additional_config_dyn_quant()),
+                                            ::testing::ValuesIn(fusing_params_dyn_quant),
+                                            ::testing::Values(true)),
+                         MatmulWeightsDecompression::getTestCaseName);
+
 const std::vector<ov::test::ElementType> sym_weights_precisions_dyn_quant = {ov::element::i8, ov::element::i4};
 
 INSTANTIATE_TEST_SUITE_P(smoke_MatMulCompressedWeights_sym_non_default_dyn_quant_group_sizes,