Free Will

[Yoo]

You say qualia are brain functions. So there is this function happening in the brain, looking at it from third pserson perspective.

That would be innaccurate, you aren't looking at your brain functions from a third person perspective..are you?  You don't see synapses firing from top down view, right?  You see colors and shapes, you feel love.  Predictable, since you don;t have eyes in your head, pointed at you brain, to observe their functions...nor could eyes -see- those functions if you did.  

Also, there are qualia happening from a first person perspective at the same time. Would you say the function happening in the brain wouldn't work if there weren't qualia from a first person perspective?

The qualia are all "happening" from the same place and from no perspective.  Perspective is a simulation based upon inputs.  Your eyes work like a camera, helping you to build a model that can be from any perspective you have sufficient (or can manufacture sufficient) mapping for.  You can thusly see a sphere in the first person, or you can "see" yourself looking at a sphere in the third person.  That we mostly have first person experiences is probabl;y more to do with the locality of our sensory apparatus than anything else.  There's a crushing weight of "first person" input, and relatively less third person models of anything.  Obviously it;s not a requirement of operation that it be first person..or else we wouldn't have that third person ability.  Your brain accepts input from your brain just as readily as it accepts input from your eyes.

I'm sorry, but I don't really understand your last paragraph. Before I really reply could you explain what you mean by " and relatively less third person models of anything." and "or else we wouldn't have that third person ability."
Do you mean thoughts that you experience, that obvisously aren't direct perceptions from your senses?