Test drivers

configname: CONFIG_MEDIA_TEST_SUPPORT

Linux Kernel Configuration
└─>Device Drivers
└─>Multimedia support
└─>Media device types
└─>Test drivers
In linux kernel since version 4.14.326 (release Date: 2023-09-23)  
Those drivers should not be used on production Kernels, but
can be useful on debug ones. It enables several dummy drivers
that simulate a real hardware. Very useful to test userspace
applications and to validate if the subsystem core is doesn't
have regressions.

Say Y if you want to use some virtual test driver.

In case of doubts, say N.
Say Y when you have a software defined radio device.