[alsa-devel] [PATCH] ALSA: Provide a CLOCK_MONOTONIC_RAW timestamp type

[Mark Brown]

On Tue, Jul 08, 2014 at 05:00:26PM +0200, Takashi Iwai wrote:
> Mark Brown wrote:

> > due to that. A raw monotonic time which does not include any adjustments
> > is available in the kernel from getrawmonotonic() so provide userspace with
> > a new timestamp type SNDRV_PCM_TSTAMP_TYPE_MONOTONIC_RAW which provides
> > timestamps based on this as an option.

> This looks good to me.  Or, thinking of the original use case, should
> we just replace ktime_get_ts() with getrawmonotonic()?  The MONOTONIC
> mode is really to be monotonic.

I'm totally OK with that as well if people don't mind that, I just added
a new clock as the most conservative option.  I can easily respin the
patch for this if you prefer?

> While we're at it: there's been long-standing request from V4L guys
> for improving the timestamps to sync with video streams.  I suggested
> to add a new mode that can be set by the driver.  Worth to consider
> it, too?

Does the wall clock stuff address that?  I've no objection to adding a
further type if the existing ones (and this one aren't sufficient).
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