BCM2835 MMAL VCHIQ service

modulename: bcm2835-mmal-vchiq.ko

configname: CONFIG_BCM2835_VCHIQ_MMAL

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Broadcom VideoCore support
└─>BCM2835 MMAL VCHIQ service
In linux kernel since version 5.1 (release Date: 2019-05-05)  
Enables the MMAL API over VCHIQ interface as used for the
majority of the multimedia services on VideoCore.
Defaults to Y when the Broadcomd BCM2835 camera host is selected.

source code: