Update davit.py

timm/models/davit.py

@@ -408,6 +408,10 @@ class DaViTStage(nn.Module):
             
         self.blocks = nn.Sequential(*stage_blocks)
     
+    @torch.jit.ignore
+    def set_grad_checkpointing(self, enable=True):
+        self.grad_checkpointing = enable
+    
     def forward(self, x : Tensor):
         x = self.patch_embed(x)
         if self.grad_checkpointing and not torch.jit.is_scripting():
@@ -522,6 +526,8 @@ class DaViT(nn.Module):
     @torch.jit.ignore
     def set_grad_checkpointing(self, enable=True):
         self.grad_checkpointing = enable
+        for stage in self.stages:
+            stage.set_grad_checkpointing(enable=enable)
         
     @torch.jit.ignore
     def get_classifier(self):
@@ -535,7 +541,10 @@ class DaViT(nn.Module):
 
     def forward_features(self, x):
         x = self.stem(x)
-        x = self.stages(x)
+        if self.grad_checkpointing and not torch.jit.is_scripting():
+            x = checkpoint_seq(self.stages, x)
+        else:
+            x = self.stages(x)
         x = self.norm(x.permute(0, 2, 3, 1)).permute(0, 3, 1, 2)
         return x