 > POW0(00) ||       var->left_margin - 0 >= POW0(0) || vSyncOn >= POW0(00) ||       vSyncOff >= POW0(00) || vBackPorch >= POW0(0) ||       tiles_in_X >= POW0(0) || tiles_in_X <= 0) {    printk(KERN_ERR "sstfb: Unsupported timings\n");    return -EINVAL;   }  } 