We are developing a driver for adv7604 for our application, the system is designed such that user can connect both HDMI and VGA to adv7604. Since adv7604 can take only one video input source and pass to its output at any moment, we want to configure adv7604 in either HDMI or VGA mode depending on what input source has been detected. We want to use adv7604 to do auto detection, for example, say adv7604 is actively receiving HDMI input, and someone plugged in a VGA source, we want to be able to detect such event and do measurement of vga source without interrupting the HDMI stream. adv7604 spec seems to indicate this is doable, but we haven't been able to figure out how. We would appreciate if anyone could provide us some guideline on this.