上面是我换了个tslib源文件重新编译的结果。看来导致x值的不正常可能与改的函数有关。但是运行ts_test点击时屏幕打印的坐标从边界来看，还是正常的。

那你再启动QT看看会打印些什么

现在QT程序点下触摸屏时，如下，会不断的打印-1程序没反应，当反复点击触摸屏，直到打印4时，程序才有反应。
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1
ret is -1

初步说明, 你修改后的input-raw.c中的while不断的在跑
继续修改继续调试吧

while不断跑的原因是ret = read(ts->fd, &jjts, sizeof(jjts));反回的是负值，这个又咋改呢？谢谢了哈。

可以考虑 ret == -1 时直接返回 0 试试
底层已经报告错误却还不断的去读是不太合理的

嗯好的哈，现在可以了，谢谢兄台给与我支持和鼓励！