[Model] Enable LoRA support for tower and connector in DotsOCR (#31825)

Signed-off-by: ShaanveerS <shaanver.singh@gmail.com>

docs/models/supported_models.md

@@ -371,7 +371,7 @@ th {
 | `DeepseekV2ForCausalLM` | DeepSeek-V2 | `deepseek-ai/DeepSeek-V2`, `deepseek-ai/DeepSeek-V2-Chat`, etc. | ✅︎ | ✅︎ |
 | `DeepseekV3ForCausalLM` | DeepSeek-V3 | `deepseek-ai/DeepSeek-V3`, `deepseek-ai/DeepSeek-R1`, `deepseek-ai/DeepSeek-V3.1`, etc. | ✅︎ | ✅︎ |
 | `Dots1ForCausalLM` | dots.llm1 | `rednote-hilab/dots.llm1.base`, `rednote-hilab/dots.llm1.inst`, etc. | | ✅︎ |
-| `DotsOCRForCausalLM` | dots_ocr | `rednote-hilab/dots.ocr` | | ✅︎ |
+| `DotsOCRForCausalLM` | dots_ocr | `rednote-hilab/dots.ocr` | ✅︎ | ✅︎ |
 | `Ernie4_5ForCausalLM` | Ernie4.5 | `baidu/ERNIE-4.5-0.3B-PT`, etc. | ✅︎ | ✅︎ |
 | `Ernie4_5_MoeForCausalLM` | Ernie4.5MoE | `baidu/ERNIE-4.5-21B-A3B-PT`, `baidu/ERNIE-4.5-300B-A47B-PT`, etc. |✅︎| ✅︎ |
 | `ExaoneForCausalLM` | EXAONE-3 | `LGAI-EXAONE/EXAONE-3.0-7.8B-Instruct`, etc. | ✅︎ | ✅︎ |

vllm/model_executor/models/dots_ocr.py

@@ -765,6 +765,14 @@ class DotsOCRForCausalLM(nn.Module, SupportsMultiModal, SupportsPP, SupportsLoRA
     def get_language_model(self) -> torch.nn.Module:
         return self.language_model
 
+    def get_num_mm_encoder_tokens(self, num_image_tokens: int) -> int:
+        merge_size = self.vision_tower.spatial_merge_size
+        return num_image_tokens * (merge_size**2)
+
+    def get_num_mm_connector_tokens(self, num_vision_tokens: int) -> int:
+        merge_size = self.vision_tower.spatial_merge_size
+        return num_vision_tokens // (merge_size**2)
+
     def embed_multimodal(self, **kwargs: object) -> MultiModalEmbeddings:
         image_input = self._parse_and_validate_image_input(**kwargs)
         if image_input is None: