[U-Boot] [linux-sunxi] Re: [PATCH] sunxi: lower the DDR frequency of Orange Pi Prime

[Icenowy Zheng]

在 2017-10-31 18:21，Maxime Ripard 写道：
> On Tue, Oct 31, 2017 at 04:17:06PM +0800, icenowy at 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 <icenowy at 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