The transmission of video after a NO_VIDEO interrupt can be detected by the VERTICAL_BLANKING interrupt. Upon the reception of a VERTICAL_BLANKING interrupt, if disabled, you might then re-enable the display timing generator.
The transmission of video after a NO_VIDEO interrupt can be detected by the VERTICAL_BLANKING interrupt. Upon the reception of a VERTICAL_BLANKING interrupt, if disabled, you might then re-enable the display timing generator.