from_pipe: Keep existing dtype by default

src/diffusers/pipelines/pipeline_utils.py

@@ -2115,7 +2115,7 @@ def from_pipe(cls, pipeline, **kwargs):
         """
 
         original_config = dict(pipeline.config)
-        torch_dtype = kwargs.pop("torch_dtype", torch.float32)
+        torch_dtype = kwargs.pop("torch_dtype", None)
 
         # derive the pipeline class to instantiate
         custom_pipeline = kwargs.pop("custom_pipeline", None)