Is it possible to use android smartphone with opencl capability as usb plugged compute device? So I just plug it in and it automatically seen from opencl program, no need for any setups.
tried google search, found nothing
This is not readily possible. Some smartphones do support OpenCL, but the ARM GPU device is not available as remote device to a connected PC.
Keep an eye out for PoCL-Remote though. This allows listing OpenCL devices from other computers on the network as local devices.