How to change DDR size from 2g to 1g

[gongyaxuan]

How to change ddr size from 2g to 1g? At present, it has been modified to show DRAM to 1g under uboot, but it has encountered the problem of kernel crash caused by cma initialization failure in the kernel phase.

What should I change to the kernel to change the ddr size

[Dhruvit]

Hi @gongyaxuan,

I hope you are doing well

As the CMA initialization is failing, one needs to apply changes in "linux,cma"  node in the kernel device tree.

Kindly replace with the below properties for the 'linux,cma' node.

linux,cma {
compatible = "shared-dma-pool";
reusable;
size = <0 0x10000000>;
linux,cma-default;
};

Thanks & Regards,

Dhruvit Vasavada

[gongyaxuan]

I use 93x chip