I've seen that you dropped this patch: https://patchwork.kernel.org/patch/10445393/
Is that patch correct or incorrect? In case it is incorrect, do you have an idea how should fbdefio be used properly on KMS drivers?
I suppose I was wondering what use fbdefio really has, modern code should be using KMS interface and the KMS dirty handling should be able to cover those cases.
I don't really like the maintainability decrease moving to in-driver page handling causes vs using shmem.
Dave.