The Clock should be placed only on PCLK pins and they cannot be placed on MIPI_CLK/GR_PCLK/GPLL pins.
Only following pins may be used for MIPI CLK: PCLKC2_0, PCLKT2_0, PCLKC2_1, PCLKT2_1, PCLKC1_0, PCLKT1_0, PCLKC1_1 & PCLKT1_1.
Also, The tool will generate the error if user uses a non-PCLK pin.