MSM8909的触摸屏驱动致使的熄屏后从新亮屏速度慢的缘由！【转】

时间 2020-05-10

标签 msm8909 msm 触摸屏驱动致使从新速度慢缘由繁體版

原文原文链接

转自：https://blog.csdn.net/kk20000/article/details/83041081函数

使用的汇顶的触摸驱动的时候会从新亮屏速度慢3秒，而在使用另一个敦泰触摸驱动的时候没有发现问题。
比较代码后发现，fb_notifier_callback的影响是关键..net

有问题的代码是：blog

static int fb_notifier_callback(struct notifier_block *self,
                              unsigned long event, void *data)
{
      struct fb_event *evdata = data;
      int *blank;
      struct goodix_ts_data *ts =
            container_of(self, struct goodix_ts_data, fb_notif);队列

      if (evdata && evdata->data && event == FB_EVENT_BLANK &&
                     ts && ts->client) {
            blank = evdata->data;get

GTP_DEBUG("fb notifier callback blank :%d",*blank);event

            if (*blank == FB_BLANK_UNBLANK)
                     goodix_ts_resume(&ts->client->dev);
            else if (*blank == FB_BLANK_POWERDOWN)
                     goodix_ts_suspend(&ts->client->dev);
      }
      return 0;
}cli

修改成下面的方式后正常:call

static int fb_notifier_callback(struct notifier_block *self,callback

                              unsigned long event, void *data)
{
      struct fb_event *evdata = data;
      int *blank;
      struct goodix_ts_data *ts =
            container_of(self, struct goodix_ts_data, fb_notif);
      if (evdata && evdata->data && event == FB_EARLY_EVENT_BLANK && ts && ts->client)
      {
            blank = evdata->data;
            GTP_DEBUG ("fb_notifier_callback:goodix blank=%d\n", *blank);
            if (*blank == FB_BLANK_UNBLANK)
            {
                     if (!work_pending (&ts->resume_work))
                     {
                              schedule_work (&ts->resume_work);
                     }
            }
            else if (*blank == FB_BLANK_POWERDOWN)
            {
                     cancel_work_sync (&ts->resume_work);
                     goodix_ts_suspend (&ts->client->dev);
            }
      }
      else if (event == FB_R_EARLY_EVENT_BLANK)
      {
            if (!work_pending (&ts->resume_work))
            {
                     schedule_work (&ts->resume_work);
            }
      }static

return 0;}