fix Qwen-Image series context parallel (#12970)

* fix qwen-image cp

* relax attn_mask limit for cp

* CP plan compatible with zero_cond_t

* move modulate_index plan to top level

Author: DefTruth

src/diffusers/models/attention_dispatch.py

@@ -1573,8 +1573,6 @@ def _templated_context_parallel_attention(
     backward_op,
     _parallel_config: Optional["ParallelConfig"] = None,
 ):
-    if attn_mask is not None:
-        raise ValueError("Attention mask is not yet supported for templated attention.")
     if is_causal:
         raise ValueError("Causal attention is not yet supported for templated attention.")
     if enable_gqa:

src/diffusers/models/transformers/transformer_qwenimage.py

@@ -761,11 +761,14 @@ class QwenImageTransformer2DModel(
     _no_split_modules = ["QwenImageTransformerBlock"]
     _skip_layerwise_casting_patterns = ["pos_embed", "norm"]
     _repeated_blocks = ["QwenImageTransformerBlock"]
+    # Make CP plan compatible with https://github.com/huggingface/diffusers/pull/12702
     _cp_plan = {
-        "": {
+        "transformer_blocks.0": {
             "hidden_states": ContextParallelInput(split_dim=1, expected_dims=3, split_output=False),
             "encoder_hidden_states": ContextParallelInput(split_dim=1, expected_dims=3, split_output=False),
-            "encoder_hidden_states_mask": ContextParallelInput(split_dim=1, expected_dims=2, split_output=False),
+        },
+        "transformer_blocks.*": {
+            "modulate_index": ContextParallelInput(split_dim=1, expected_dims=2, split_output=False),
         },
         "pos_embed": {
             0: ContextParallelInput(split_dim=0, expected_dims=2, split_output=True),