add dpm-solver pytorch in stable-diffusion pipeline

Author: LuChengTHU

src/diffusers/pipelines/stable_diffusion/pipeline_stable_diffusion.py

@@ -15,6 +15,7 @@
     EulerDiscreteScheduler,
     LMSDiscreteScheduler,
     PNDMScheduler,
+    DPMSolverDiscreteScheduler,
 )
 from ...utils import deprecate, logging
 from . import StableDiffusionPipelineOutput
@@ -59,7 +60,8 @@ def __init__(
         tokenizer: CLIPTokenizer,
         unet: UNet2DConditionModel,
         scheduler: Union[
-            DDIMScheduler, PNDMScheduler, LMSDiscreteScheduler, EulerDiscreteScheduler, EulerAncestralDiscreteScheduler
+            DDIMScheduler, PNDMScheduler, LMSDiscreteScheduler, EulerDiscreteScheduler, EulerAncestralDiscreteScheduler,
+            DPMSolverDiscreteScheduler,
         ],
         safety_checker: StableDiffusionSafetyChecker,
         feature_extractor: CLIPFeatureExtractor,