Man pages matching name clgetdeviceidsfromdx9mediaadapterkhr in section 3clc:

clGetDeviceIDsFromDX9MediaAdapterKHR.3clc.en	debian 10 / opencl-1.2-man-doc
clGetDeviceIDsFromDX9MediaAdapterKHR.3clc.en	debian 11 / opencl-1.2-man-doc