$ objdump -T --demangle /usr/lib64/libcec.so.6.0.2 | grep TDA995x 0000000000000000 D *UND* 0000000000000000 Base CEC::CTDA995xCECAdapterDetection::FindAdapter() 0000000000000000 D *UND* 0000000000000000 Base CEC::CTDA995xCECAdapterCommunication::CTDA995xCECAdapterCommunication(CEC::IAdapterCommunicationCallback*) libcec adds the functions to the interface if HAVE_TDA995X_API is defined, but does a separate check for headers (which fails) for building the implemented functions. https://github.com/Pulse-Eight/libcec/blob/master/src/libcec/adapter/TDA995x/TDA995xCECAdapterDetection.cpp#L37 https://github.com/Pulse-Eight/libcec/blob/master/src/libcec/cmake/CheckPlatformSupport.cmake#L137 This then leads to failed builds elsewhere such as with kodi. I don't have a good idea where these headers are from. I'm only seeing that android's fork of the kernel had tda998x_ioctl.h at some point.
My guess is linux-headers installed it once upon a time and it got dropped.
