Only VPS_DC_VENC_HDMI | VPS_DC_VENC_HDCOMP (HDMI tied with HDCOMP) and VPS_DC_VENC_DVO2 | VPS_DC_VENC_HDCOMP (DVO2 tied with HDCOMP)
tied venc configuration mesh is predefined in DVRRDK system_dctrl.c. HDMI tied with DVO2 is not supported by default. You have to modify system_dctrl.c to support this.