linux-kernel - Re: [PATCH v4 1/4] Produce system time from correlated clocksource

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Message-ID: <20151015054142.GA4784@netboy>
Date:	Thu, 15 Oct 2015 07:41:43 +0200
From:	Richard Cochran <richardcochran@...il.com>
To:	Christopher Hall <christopher.s.hall@...el.com>
Cc:	Thomas Gleixner <tglx@...utronix.de>, jeffrey.t.kirsher@...el.com,
	hpa@...or.com, mingo@...hat.com, john.stultz@...aro.org,
	peterz@...radead.org, x86@...nel.org,
	intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, kevin.b.stanton@...el.com
Subject: Re: [PATCH v4 1/4] Produce system time from correlated clocksource

On Wed, Oct 14, 2015 at 07:34:03PM -0700, Christopher Hall wrote:
> I hope this is helpful. Thanks.

So the DSP does not produce or consume system time stamps. Fine.
Still I fail to understand why you need the system time.

Thomas seems to say that there are *other* applications that will want
to transform device time into system time, but why does your audio
application use the system time, when the audio-to-ptp time is
directly available, without any man in the middle?

Thanks,
Richard
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