Memory-to-memory multimedia devices

configname: CONFIG_V4L_MEM2MEM_DRIVERS

Linux Kernel Configuration
└─>Device Drivers
└─>Multimedia support
└─>Media drivers
└─>Media platform devices
└─>Memory-to-memory multimedia devices
In linux kernel since version 2.6.35 (release Date: 2010-08-01)  
Say Y here to enable selecting drivers for V4L devices that
use system memory for both source and destination buffers, as opposed
to capture and output drivers, which use memory buffers for just
one of those.