How to update 2G LPDDR3 to 1G LPDDR3 on imx7d

[tjqin]

Hi:

How to update 2G LPDDR3 to 1G LPDDR3 on imx7d. What should I do with uboot and kernel?  Now I am using kernel 4.1.15 , uboot 2015.04-r0 . Just modify imximage.cfg DDRC_ADDRMAP0~DDRC_ADDRMAP6 to value of 1G. build uboot, lpddr3 no normal work. Do you need to modify other code?

[tjqin]

Use MX6/7 DDR Stress Test Tool V2.92 calibration infomation
============================================
DDR Stress Test (2.9.2)
Build: Sep 17 2018, 23:09:04
NXP Semiconductors.
============================================

============================================
Chip ID
CHIP ID = i.MX7 Dual (0x72)
Internal Revision = TO1.2
============================================

============================================
Boot Configuration
SRC_SBMR1(0x30390058) = 0x00002820
SRC_SBMR2(0x30390070) = 0x09000001
============================================

============================================
DDR configuration
DDR type is LPDDR3
Data width: 32, bank num: 8
Row size: 14, col size: 10
Two chip selects are used
Density per chip select: 512MB
Total density is 1024MB
============================================

DDR Freq: 528 MHz

Calibration for 32-bit data bus

Starting Read calibration...

Read Delay value: Result:
0x9e9e9e9e 0x1111
0x9c9c9c9c 0x1111
0x9a9a9a9a 0x1111
0x98989898 0x1111
0x96969696 0x1111
0x94949494 0x1111
0x92929292 0x1111
0x90909090 0x1111
0x8e8e8e8e 0x1111
0x8c8c8c8c 0x1111
0x8a8a8a8a 0x1010
0x88888888 0x0000
0x86868686 0x0000
0x84848484 0x0000
0x82828282 0x0000
0x80808080 0x0000
0x02020202 0x0000
0x04040404 0x0000
0x06060606 0x0000
0x08080808 0x0000
0x0a0a0a0a 0x0000
0x0c0c0c0c 0x0000
0x0e0e0e0e 0x0000
0x10101010 0x0000
0x12121212 0x0000
0x14141414 0x0000
0x16161616 0x0000
0x18181818 0x0000
0x1a1a1a1a 0x0110
0x1c1c1c1c 0x1111
0x1e1e1e1e 0x1111
0x20202020 0x1111
0x22222222 0x1111
0x24242424 0x1111
0x26262626 0x1111
0x28282828 0x1111
0x2a2a2a2a 0x1111
0x2c2c2c2c 0x1111
0x2e2e2e2e 0x1111

Final read delay = 0x08080808
-Note: final delay is based on the center of all passing byte lanes

Starting Write calibration...

Write Delay value: Result:
0x9e9e9e9e 0x1111
0x9c9c9c9c 0x1111
0x9a9a9a9a 0x1111
0x98989898 0x1111
0x96969696 0x1111
0x94949494 0x1111
0x92929292 0x1111
0x90909090 0x1111
0x8e8e8e8e 0x1110
0x8c8c8c8c 0x0000
0x8a8a8a8a 0x0000
0x88888888 0x0000
0x86868686 0x0000
0x84848484 0x0000
0x82828282 0x0000
0x80808080 0x0000
0x02020202 0x0000
0x04040404 0x0000
0x06060606 0x0000
0x08080808 0x0000
0x0a0a0a0a 0x0000
0x0c0c0c0c 0x0000
0x0e0e0e0e 0x0000
0x10101010 0x0000
0x12121212 0x0000
0x14141414 0x0000
0x16161616 0x1000
0x18181818 0x1010
0x1a1a1a1a 0x1111
0x1c1c1c1c 0x1111
0x1e1e1e1e 0x1111
0x20202020 0x1111
0x22222222 0x1111
0x24242424 0x1111
0x26262626 0x1111
0x28282828 0x1111
0x2a2a2a2a 0x1111
0x2c2c2c2c 0x1111
0x2e2e2e2e 0x1111

Final write delay = 0x04040404
-Note: final delay is based on the center of all passing byte lanes

Read calibration
DDRPHY_OFFSETR_CON0 (0x30790020) = 0x08080808

Write calibration
DDRPHY_OFFSETW_CON0 (0x30790030) = 0x04040404

Success: DDR calibration completed!!!

I update uboot/../mx7dsabresd/imximage.cfg with new calibration settings

DATA 4 0x30790020 0x08080808

DATA 4 0x30790030 0x04040404

#define PHYS_SDRAM_SIZE   SZ_1G

build u-boot-imx-mfgtool in yocto, Use MfgTool2.exe download image, Uboot is not working on the 1GB LPDDR3 board，Uboot is working on the 2GB board.

[igorpadykov]

Hi  tianjing

you are right, for new memory it is necessary to run ddr test

i.MX6/7 DDR Stress Test Tool V2.92 

and update uboot/../mx7dsabresd/imximage.cfg with new calibration settings found from ddr test,

then adjust #define PHYS_SDRAM_SIZE in include/configs/mx7dsabresd.h

Best regards
igor
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