Try to reverse the dtype checking mechanism

modules/devices.py

@@ -4,6 +4,7 @@ from functools import lru_cache
 
 import torch
 from modules import errors, shared
+from modules import torch_utils
 
 if sys.platform == "darwin":
     from modules import mac_specific
@@ -140,11 +141,7 @@ def manual_cast_forward(target_dtype):
             args = [arg.to(target_dtype) if isinstance(arg, torch.Tensor) else arg for arg in args]
             kwargs = {k: v.to(target_dtype) if isinstance(v, torch.Tensor) else v for k, v in kwargs.items()}
 
-        org_dtype = target_dtype
-        for param in self.parameters():
-            if param.dtype != target_dtype:
-                org_dtype = param.dtype
-                break
+        org_dtype = torch_utils.get_param(self).dtype
 
         if org_dtype != target_dtype:
             self.to(target_dtype)