在 2017-10-31 18:21，Maxime Ripard 写道：
On Tue, Oct 31, 2017 at 04:17:06PM +0800, icen...@aosc.io wrote:
在 2017-10-31 16:09，Maxime Ripard 写道：
> On Tue, Oct 31, 2017 at 03:56:08PM +0800, Icenowy Zheng wrote:
> > When I use Orange Pi Prime to do some heavy compliation tasks, the gcc
> > compiler sometimes mysteriously segfaults, and memtester catches
> > memory
> > error. As the lima-memtester cannot support H5 (Mali-450 GPU
> > equipped),
> > there's no really reliable way to detect DRAM stability except try and
> > error.
> >
> > Lower the DDR frequency to 624MHz seems to solved the issue.
> >
> > Set the default frequency to 624MHz in the defconfig, as 672MHz is
> > observed to be unstable at least on my board.
> >
> > Signed-off-by: Icenowy Zheng <icen...@aosc.io>
>
> What is the value used in the fex file?
672MHz. The current frequency and ZQ are both the same with FEX. [1]
[1]
https://github.com/OrangePiLibra/OrangePi_H5SDK/blob/master/external/sys_config.fex
And it breaks the same way on a legacy kernel?
Sorry but I didn't use any legacy-based solutions on H5.
Maxime
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