Make IPAdapter compatible to torch.compile

[rootonchair]

What does this PR do?

Fixes #7985

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[yiyixuxu]

should we also add a test?

[yiyixuxu]

ok but do we know why it has to be done this way? any documentation etc?
e.g. would this work?

for layer in self.layers:
    [ln0, ln1, attn, ff] = layers

[rootonchair]

If you try to unpack a ModuleList like above or just like in the original implementation. Following error occurs:

torch._dynamo.exc.Unsupported: UNPACK_SEQUENCE NNModuleVariable()

So I assume that any unpacking with ModuleList is not supported in torch.compile and only for loop through it is supported. Hence, I for loop the ModuleList to not breaking the graph and upack using python list

[rootonchair]

I also try moving ln0, ln1, attn, ff into a class, but it will affect the weight loading

[fabiorigano]

I also try moving ln0, ln1, attn, ff into a class, but it will affect the weight loading

hi @rootonchair, you can use the IPAdapterPlusImageProjectionBlock class, but you have to update the loading function too.
I think the final result would be really good, as the code consistency in the library would improve

[HuggingFaceDocBuilderDev]

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[yiyixuxu]

cc @fabiorigano too

[fabiorigano]

hi @yiyixuxu thanks for adding me here
IPAdapterPlusImageProjection was added some time ago, I am not sure why it has been implemented in this way

I think it would be nice to have a forward function that uses the

diffusers/src/diffusers/models/embeddings.py

Line 892 in d6ca120

class IPAdapterPlusImageProjectionBlock(nn.Module):

that we introduced with the Face ID PR #7186

[yiyixuxu]

thanks @fabiorigano!
cc @rootonchair, does face id currently work with torch.compile?

[rootonchair]

@yiyixuxu yes it does. As @fabiorigano suggested, we could utilize IPAdapterPlusImageProjectionBlock however weight loading also need to be updated

[sayakpaul]

This works for me. Thank you, @rootonchair!

Perhaps the use of IPAdapterPlusImageProjectionBlock could live in a different PR? @yiyixuxu WDYT?

[fabiorigano]

I can open a new PR to use IPAdapterPlusImageProjectionBlock, if @rootonchair agrees

[sayakpaul]

That would be great, thank you!

[rootonchair]

Sure @fabiorigano, thank you

[sayakpaul]

@rootonchair does #7994 work for you?

[rootonchair]

@sayakpaul yes it does. Fantastic works

[sayakpaul]

Fantastic. Would you mind closing the PR then? I am sorry about the inconvenience here.

[rootonchair]

Ah, no problem. I assume closing #7985 too?