If your laptop HDMI port is only labeled "HDMI" then it is output only. If it is labeled "HDMI-in" then it is an input. Each HDMI port can only be an input or an output, no switch hitters here.
The Clevo 18.4inch laptop mobo with the HDMI-in port was discontinued a while ago (including all subsequent variants from Sager and Powernotebooks, etc), tho I believe this was because Alienware purchased the rights to that mobo's technology and have now released an 18.4inch laptop with hdmi-in and hdmi-out. Link is here: http://www.dell.com/us/p/alienware-m18x/pd.aspx
If your laptop does not have an 18.4 inch screen, then there is no chance that you have an HDMI-in.