Can someone explain what is the difference between external and internal vsync for the i.MX53 IPU's CSI / camera sensor interface.
The reference manual is not too clear about it. Searching for "external vsync" does not find any paragraph explaining the difference between internal and external vsync.
45.51.111 CSI0 Sensor Configuration Register (IPU_CSI0_SENS_CONF)
bit 5 External VSYNC enable. This bits select between external and internal VSYNC.
0 Internal VSYNC mode.
1 External VSYNC mode.