4GB SDRAM custom board use micron MT41K512M16HA chip not working

We have a 4GB SDRAM custom board use micron MT41K512M16HA chip

I compiler kernel with below funtion,
System Type - Full 4GB physical memory support
System Type - Support for the LPAE
Kernel features - Memory split is 3G user / 1G kernel

i follow https://devtalk.nvidia.com/default/topic/724211/jetson-tk1-ram-specification-clarification/?offset=23

Hello, nuu9323226:
To support 4G RAM in Jetson, you may have to do more than re-configuring kernel.
1. Kernel part
1.1 DVFS table @ arch/arm/mach-tegra/board-ardbeg-memory.c must be updated according the DDR chip used.
1.2 CONFIG_ARM_LPAE must be enabled in kernel configuration.
1.3 Another little patch for ethernet driver @ drivers/net/ethernet/realtek/r8169.c must be applied, otherwise the network may fail to work.
2. extlinux.conf must be changed to add mem and ddr_die, like mem=2048M@4096M, ddr_die=2048M@4096M.
3. BCT with the new DDR chip must be applied during flashing.

br
Chenjian

the 2GB is working.
when I change kernel parameters,
add mem=2015M@2048M mem=2048M@4096M ddr_die=2048M@2048M ddr_die=2048M@4096M
the boot kernel halt, not running kernel

I don’t update DVFS table&BCT with micron MT41K512M16HA.
How can I upgrade to this?

sorry my english

the ram is not supported by tk1. the hynix 8Gb chip is supported by tk1.
I known MT41K512M16HA-125:A is not ok because tk1 only support twin die 8Gb sdram.
MT41K512M16TNA-125 can be used

Thank you,Asong
I will try chip MT41K512M16TNA-125
It’s a good idea.

Several requests have been made for >= 4GB RAM support for Tegra K1. While we don’t provide support for this configuration, there are patches to enable LPAE in your kernel for experimentation purpose, please check the details in following link:

https://devtalk.nvidia.com/default/topic/924464/?comment=4836941

Thanks

I have the MT41K512M16HA-125:A (4GB) working with our custom Tegra K1 board. So you do not have to have a twin die like Asong stated.

Additionally we have a 8GB (MT41K1G16DGA-125) Micron memory working as well on our TK1 board. It was not very difficult to get the memories working so the fact that NVIDIA does not support >=4GB DRAM is of little consequence.