AU1200_LCD_MAX_CLK
pixclock = min3(pixclock, fbi->monspecs.dclkmax, (u32)AU1200_LCD_MAX_CLK/2);
if (AU1200_LCD_MAX_CLK % pixclock) {
int diff = AU1200_LCD_MAX_CLK % pixclock;
int pcd = AU1200_LCD_MAX_CLK / (pixclock * 2) - 1;