HDCP noncompliant original HMD

Now, I’m trying to run the direct_mode_dx program using the original HMD.
However, in order to operate the direct_mode_dx program, HMD must support HDCP, but the original HMD used is not compatible with HDCP and can not be operated.
Is there any way to operate the direct_mode_dx program even when it is not compatible with HDCP?