sst_calc_pll
sst_calc_pll(gfx_clock, &Fout, &gfx_timings);
sst_calc_pll(20000, &Fout, &gfx_timings);
if (sst_calc_pll(PICOS2KHZ(var->pixclock), &freq, &par->pll)) {
sst_calc_pll(PICOS2KHZ(info->var.pixclock), &freq, &par->pll);