Ideas for improving LCD speed

How do you set the freq of the LCD? I played with the baud rate passed to spi_init but I don’t get consistent results. The max I can set it is 105 million bauds with rp2350 at 210 MHz, which results in a 38 screen updates per second, but I don’t fully grasp this frequency source/divider business and I am not sure what the underlying LCD freq is.