i9xx_calc_dpll_params
port_clock = i9xx_calc_dpll_params(refclk, &clock);
port_clock = i9xx_calc_dpll_params(refclk, &clock);
WARN_ON(i9xx_calc_dpll_params(48000, &clock) != 25154);
i9xx_calc_dpll_params(refclk, &clock);
i9xx_calc_dpll_params(refclk, &clock);