Maximum number of devices

configname: CONFIG_VIDEO_VIVID_MAX_DEVS

Linux Kernel Configuration
└─>Device Drivers
└─>Multimedia support
└─>Media drivers
└─>V4L test drivers
└─>Maximum number of devices
In linux kernel since version 3.10 (release Date: 2013-06-30)  
This allows you to specify the maximum number of devices supported
by the vivid driver.