For each video frame received, the deserializer will count the number of video lines in the frame. In CSI-2 input mode, any long packet will be counted as a video line. In RAW mode, any assertion of the Line Valid (LV) signal will be interpreted as a video line. The LINE_COUNT_1 and LINE_COUNT_0 registers (Table 7-129 and Table 7-130) can be used to read the line count for the most recent video frame. Line Length may not be consistent when receiving multiple CSI-2 video streams differentiated by VC-ID. An interrupt may be enabled based on a change in the LINE_COUNT value. If interrupts are enabled, the LINE_COUNT registers will be latched at the interrupt and held until read back by the processor through the I2C.