Ram Size Increase - Android imx8mm

seanlink — Thu, 19 May 2022 22:35:59 GMT

We are working on a product that is closely modeled after the imx8mm_evk. Due to increased memory demand, we decided to increase the amount of RAM from 2GB to 3GB. Android is able to boot with only one change within uboot.

include/configs/imx8mm_evk.h

- #define PHYS_SDRAM_SIZE 0x80000000 /* 2GB DDR */
+ #define PHYS_SDRAM_SIZE 0xC0000000 /* 3GB DDR */

I was wondering why I didn't need to make any changes to the device tree itself? Shouldn't this have crashed or failed to compile if the deivce tree was not updated? Am I going to get into any trouble without updating the device tree?

Section to update in question

arch/arm/dts/imx8mm-evk.dts

memory@40000000 {
device_type = "memory";
reg = <0x0 0x40000000 0 0x80000000>;
};

Re: Ram Size Increase - Android imx8mm

Zhiming_Liu — Mon, 23 May 2022 03:00:51 GMT

Am I going to get into any trouble without updating the device tree?

-->No, The DRAM has been initialized in SPL. It doesn't use dts in this stage.

topic Re: Ram Size Increase - Android imx8mm in i.MX Processors

Ram Size Increase - Android imx8mm

Re: Ram Size Increase - Android imx8mm