Configuring USB FIFOs

Hi there,
I am struggling to understand and achieve a USB gadget with Mass Storage + Serial(cdc-acm) + 1 custom interface with one bulk in and one bulk out though functionfs. Every interface works fine when runs separately. Issue starts when i try to make a composite device because of the fifo configuration.
I understand there is total of 4KB Fifo as described in reference manual and is configurable for each endpoint as needed.
I believe in my case :
MSG = I need 1 BULK IN + 1 BULK OUT
CUSTOM = I need 1 BULK IN and 1 BULK OUT
CDC ACM = needs 1 BULK IN and i BULK OUT + 1 interrupt endpoint
so my requirement is only for np-tx-fifo, is this correct?

But alwasy in composite mode it fails with :
dwc2 49000000.usb-otg: dwc2_hsotg_ep_enable: No suitable fifo found

.. <<from stm32mp151.dtsi>> – and total of entries can be 952 dwords.
g-rx-fifo-size = <128>;
g-np-tx-fifo-size = <512>;
g-tx-fifo-size = <128 128 64 64 64 64 32 32>;

Can somebody please explain how to configure it properly to achieve a composite device ?

Thanks, Rishi