default or selected kernelversion does not have config value CONFIG_EASYCAP_DEBUG.
Result is shown for kernelversion 6.2.5

Enable EasyCAP driver debugging

configname: CONFIG_EASYCAP_DEBUG

Linux Kernel Configuration
└─>Device Drivers
└─>Staging drivers
└─>Enable EasyCAP driver debugging
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
This option enables debug printouts

To enable debug, pass the debug level to the debug module
parameter:

modprobe easycap debug=[0..9]