Re: [PATCH] staging: fbtft: Replace mdelay() with msleep() and usleep_range()

From: Andy Shevchenko
Date: Fri Jul 27 2018 - 06:34:52 EST

On Fri, Jul 27, 2018 at 12:21 PM, Jia-Ju Bai <baijiaju1990@xxxxxxxxx> wrote:
> reset() and init_display() are never called in atomic context.
> They call mdelay() to busily wait, which is not necessary.
> mdelay() can be replaced with msleep().

> gpio_set_value(par->gpio.reset, 0);
> udelay(20);
> gpio_set_value(par->gpio.reset, 1);
> - mdelay(120);
> + msleep(120);

I didn't look to the rest, but this one will be inconsistent after your patch.

The question here is why udelay() is needed, while mdelay() changed?

With Best Regards,
Andy Shevchenko