you can use fb sysfs
/kernel/drivers/video/fbsysfs.c
static ssize_t show_virtual(struct device *device,
struct device_attribute *attr, char *buf)
{
struct fb_info *fb_info = dev_get_drvdata(device);
return snprintf(buf, PAGE_SIZE, "%d,%d\n", fb_info->var.xres_virtual,
fb_info->var.yres_virtual);
}
olivia mckenzy於 2012年3月17日星期六UTC+8上午3時43分40秒寫道：
>
> Hi, i wanted to know if there is a way to obtain the screen resolution
> in a device driver, i thought of reading a file but it seems not to be
> a great solution, what i want is to use the xres and the yres of the
> screen resolution in a touchscreen driver to calibrate the touchscreen
> inside the driver, i already made the manual calibration inside the
> driver, but it has to be automatically so that's why i need the
> resolution, is there a way to obtain that?, if someone could help me,
> it would be great, thanks in advanced.
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