Hi m2pc,
Did you figure out which i2c port maps to the i2c0 and i2c1 on the custom solutions header?
I don't know why, but I'm also getting an i2c-7 port.
xubuntu@xubuntu:~$ sudo i2cdetect -l
i2c-0 i2c i915 gmbus ssc I2C adapter
i2c-1 i2c i915 gmbus vga I2C adapter
i2c-2 i2c i915 gmbus panel I2C adapter
i2c-3 i2c i915 gmbus dpc I2C adapter
i2c-4 i2c i915 gmbus dpb I2C adapter
i2c-5 i2c i915 gmbus dpd I2C adapter
i2c-6 i2c DPDDC-B I2C adapter
i2c-7 i2c DPDDC-C I2C adapter