void INT_DWDMA(void)
{
    DWDMA_CLEAR_TFR |= 1;
    mutex_unlock(&lcd_updating);    
}

void lcd_update()
{
    mutex_lock(&lcd_updating);

    lcd_set_gram_area(0, 0, LCD_WIDTH, LCD_HEIGHT);
    lcdctrl_bypass(0);

    commit_discard_dcache_range(FBADDR(0,0), 2*LCD_WIDTH*LCD_HEIGHT);

    while (!(LCDC_STA & LCDC_MCU_IDLE));

    dwdma_start(0, scr_llp, 6);
    udelay(10);

    MCU_CTRL=(1<<1)|(1<<2)|(1<<5);x
}