It's only a slight variation that makes it a little bit more polite. A little bit less approaching.

这样轻微的变形可以使你的问题变得更为礼貌，也更为委婉。

Do you mind 课堂 - SpeakingMax英语口语达人

Also, this is a slight variation on the "I need" pattern. You can say "all I need is".

同样的，“I need”句型也会有些小的变形。你可以说“all I need is”。

I need 课堂 - SpeakingMax英语口语达人