显卡整个调用过程：

zangcf

static struct fb_ops mtkfb_ops = {
    .owner          = THIS_MODULE,
    .fb_open        = mtkfb_open,
    .fb_release     = mtkfb_release,
    .fb_setcolreg   = mtkfb_setcolreg,
    .fb_pan_display = mtkfb_pan_display_proxy,
    .fb_fillrect    = cfb_fillrect,
    .fb_copyarea    = cfb_copyarea,
    .fb_imageblit   = cfb_imageblit,
    .fb_cursor      = mtkfb_soft_cursor,
    .fb_check_var   = mtkfb_check_var,
    .fb_set_par     = mtkfb_set_par,
    .fb_ioctl       = mtkfb_ioctl,
};

[   10.348760] (1)[220:SurfaceFlinger][zcfdebug] here in mtkfb_pan_display_proxy
[zcfdebug] here in mtkfb_pan_display_impl
[   10.350147] (1)[220:SurfaceFlinger][zcfdebug] here in mtkfb_update_screen
[   10.351277] (1)[220:SurfaceFlinger][zcfdebug] here in mtkfb_update_screen_impl(void)

zangcf

修改带进info的参数