On Sun, Oct 28, 2018 at 12:26:18AM +0800, Icenowy Zheng wrote:
在 2017-10-31二的 09:09 +0100，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@aosc.io
What is the value used in the fex file?
When testing with BSP images made by Orange Pi, I found that in newer images they secretly tweaked the DDR freq of Orange Pi PC2 and Prime to 624MHz.
This is found by checking pll-dram frequency after booting.
Ok then. Can you resend that patch?
Thanks! Maxime