CONFIG_AMD_ISP_PLATFORM is not available for thedefaultarchitecture x86.
Result is shown for architecture 64BIT
default or selected kernelversion does not have config value CONFIG_AMD_ISP_PLATFORM.
Result is shown for kernelversion 6.16-rc6

AMD ISP4 platform driver

modulename: amd_isp4.ko

configname: CONFIG_AMD_ISP_PLATFORM

Linux Kernel Configuration
└─>Device Drivers
└─>X86 Platform Specific Device Drivers
└─>AMD ISP4 platform driver
In linux kernel since version 6.1.145 (release Date: 2025-07-14)  
Platform driver for AMD platforms containing image signal processor
gen 4. Provides camera sensor module board information to allow
sensor and V4L drivers to work properly.

This driver can also be built as a module. If so, the module
will be called amd_isp4.

source code: