On Tue, May 17, 2016 at 08:54:27AM +0200, Jean-Francois Moine wrote:

On Mon, 16 May 2016 22:15:09 +0200
Maxime Ripard [off-list ref] wrote:

quoted

quoted

quoted

Yes, I intended it to be a simple busy waiting loop since I don't
expect it to be very long. Do yu have any more data on how much time
it usually takes?

I have a Soc in which the rate of the audio clock is stable after a
good second.

You mean before the clock is actually stable, or before the lock bit
is cleared?

Which SoC is it? As far as I've seen, only the H3 allows to configure
the stable time, and while by default it will take 16us, you can
configure as high as 66ms (which is still way higher than the current
limit).

Hi Maxime,

Well, it is not a SoC, but an external chip, the SI5351 (in the Dove
Cubox). There is no lock bit, but as it is used for audio, and as I did
not set any delay at streaming start time, I can hear when the clock is
stable.

Ok. So I guess we set it high enough to cover the maximum we know for
know (65ms), and we can always rise that up later if needed.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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