Function _lcd_drv_init

bsp/allwinner/libraries/drivers/drv_lcd.c:204–305

}

static int _lcd_drv_init(lcd_device_t lcd_drv)
{
    unsigned long arg[6] = {0};
    void *framebuffer = RT_NULL;
    void *frontbuf = RT_NULL;
    void *backbuf = RT_NULL;

    /*
     * The event is used for the synchronization between updating the
     * framebuffer and flushing the screen.
     */
    rt_event_init(&lcd_drv->lcd_evt, "lcd_evt", RT_IPC_FLAG_FIFO);

    /* the lcd device information defined by RT-Thread */
    arg[0] = lcd_drv->use_screen;
    lcd_drv->lcd_info.width = (rt_uint16_t)disp_ioctl(DISP_GET_SCN_WIDTH, arg);
    lcd_drv->lcd_info.height = (rt_uint16_t)disp_ioctl(DISP_GET_SCN_HEIGHT, arg);
    lcd_drv->lcd_info.bits_per_pixel = 32;
    lcd_drv->lcd_info.pixel_format = RTGRAPHIC_PIXEL_FORMAT_ARGB888; /* should be coherent to adding layers */

    /* allocate the framebuffer, the front buffer and the back buffer */
    /* framebuffer */
#ifdef RT_USING_SMART
    framebuffer = rt_pages_alloc(rt_page_bits(LCD_DRV_FB_SZ));
#else
    framebuffer = rt_malloc(LCD_DRV_FB_SZ);
#endif
    if (!framebuffer)
    {
        rt_kprintf("malloc framebuffer fail\n");
        goto out;
    }
    lcd_drv->lcd_info.framebuffer = framebuffer;
    lcd_drv->framebuffer = framebuffer;
    lcd_drv->framebuffer_phy = (void *)((size_t)framebuffer + PV_OFFSET);
    memset(framebuffer, 0, LCD_DRV_FB_SZ);
    rt_hw_cpu_dcache_clean(lcd_drv->framebuffer, LCD_DRV_FB_SZ);
#ifdef RT_USING_SMART
    frontbuf = rt_pages_alloc(rt_page_bits(LCD_DRV_FB_SZ));
#else
    frontbuf = rt_malloc(LCD_DRV_FB_SZ);
#endif
    if (!frontbuf)
    {
        rt_kprintf("malloc frontbuf fail\n");
        goto out;
    }
    lcd_drv->front_buf_info.buff = frontbuf;
    lcd_drv->front_buf_info.buff_phy = (void *)((size_t)frontbuf + PV_OFFSET);
    memset(frontbuf, 0, LCD_DRV_FB_SZ);
    rt_hw_cpu_dcache_clean(lcd_drv->front_buf_info.buff, LCD_DRV_FB_SZ);

    if ((lcd_drv->panel) && (lcd_drv->panel->swap_flag != 0))
    {
        /* backbuf */
#ifdef RT_USING_SMART
        backbuf = rt_pages_alloc(rt_page_bits(LCD_DRV_FB_SZ));
#else