After following your advice and checking all TVP sync outputs and other status registers, I believe the TVP is configured properly for my input signal. All timings match the XGA DMT standard.
I am moving along to the VPIF portion of the DM6467T. Can the VPIF be configured to support the XGA output from the TVP? I thought all that would be needed is to set the IMG_LINE_OFFSET, HSIZE_CFG and VSIZE_CFG options to match the TVP setup, but when I try this I never receive the frame interrupts on either capture channel 0 or 1.