default or selected kernelversion does not have config value CONFIG_DRM_PTN3460.
Result is shown for kernelversion 6.4.14

PTN3460 DP/LVDS bridge

modulename: ptn3460.ko

configname: CONFIG_DRM_PTN3460

Linux Kernel Configuration
└─>Device Drivers
└─>Graphics support
└─>Direct Rendering Manager
└─>Direct Rendering Manager (XFree86 4.1.0 and higher DRI support)
└─>PTN3460 DP/LVDS bridge
In linux kernel since version 3.15 (release Date: 2014-06-08)  
source code:
drivers/gpu/drm//bridge/ptn3460.c