Hi @Devil-Vaas, welcome to MadeForTrade,
The collateral margin from pledging your delivery holdings can be used across all segments (equity, F&O, currency, and MCX). However, Clearing Corporation (CC) requires brokers to maintain a 50:50 margin ratio half in cash/cash equivalents and half in non-cash (approved securities). Read more here and here. If the collateral is cash component then no extra cash required unless there is a MTM loss.