[Intel-gfx] [RFC 1/4] time: export getnstime_raw_and_real for DRM

[Kristian Høgsberg]

On Fri, Oct 5, 2012 at 9:36 AM, Imre Deak <imre.deak at intel.com> wrote:
> Needed by the upcoming DRM raw monotonic timestamp support.

I just had a quick look at driver/input/evdev.c, since evdev devices
did a similar change recently to allow evdev timestamp from the
monotonic clock.  They're using a different time API:

	time_mono = ktime_get();
        time_real = ktime_sub(time_mono, ktime_get_monotonic_offset());

and

        event->time = ktime_to_timeval(client->clkid == CLOCK_MONOTONIC ?
			                mono : real);

I'm not really up-to-date on kernel time APIs, but I wonder if that
may be better?  At least, I suspect we wouldn't need changes outside
drm if we use this API.

Kristian


> Signed-off-by: Imre Deak <imre.deak at intel.com>
> ---
>  kernel/time/timekeeping.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/kernel/time/timekeeping.c b/kernel/time/timekeeping.c
> index d3b91e7..073d262 100644
> --- a/kernel/time/timekeeping.c
> +++ b/kernel/time/timekeeping.c
> @@ -365,7 +365,7 @@ void ktime_get_ts(struct timespec *ts)
>  }
>  EXPORT_SYMBOL_GPL(ktime_get_ts);
>
> -#ifdef CONFIG_NTP_PPS
> +#if defined(CONFIG_NTP_PPS) || defined(CONFIG_DRM) || defined(CONFIG_DRM_MODULE)
>
>  /**
>   * getnstime_raw_and_real - get day and raw monotonic time in timespec format
> --
> 1.7.9.5
>