PLL_PREDIV
if (pinternal(pll, cfg, PLL_PREDIV))
mask = pmask(pll, PLL_PREDIV);
index = pindex(pll, PLL_PREDIV);
width = pwidth(pll, PLL_PREDIV);
return mtk_hdmi_pll_set_hw(hw, PLL_PREDIV, fbkdiv_high, fbkdiv_low,