Which broker gives margin benefit if you have full lot of shares in your demat for covered call?

Lets say I have full lot of shares in my demat holding and I am ready to pledge ...which broker will give me margin benefit so I don't have spare additional margin for writing a covered call against the holding?
Zerodha does not provide that ..do you any other broker?

Also want to know which broker does not charge additional broker when our call or put becomes in the money and we want to either give or take delivery against our option position?