On 03/09/2012 07:06 AM, 马强 wrote:
> Hi Gilles,
>
> I have changed mxc_min_delay as follow
> mxc_min_delay = ((__ipipe_cpu_freq + 500000) / 1000000) ?: 1;
> ->
> mxc_min_delay = ((__ipipe_cpu_freq + 250000) / 500000) ?: 1;
> means make min delay form 1us to 2us, and it seems to work well. I need a
> longer test to check it out.
>
> Another issue about this change is whether 2us is long enough? In other
> words, Is 2us a threshold value that due to hardware or an assumed value that
> make the possibility smaller? if it is the later one, 2us and someone bigger
> seems not to be a perfect solution.
You can try mxc_min_delay = 0xff, since it is what linux does in the
latest release.
--
Gilles.
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