IMX6S + LPDDR2

zhanghaijian — Tue, 25 Jul 2017 12:18:17 GMT

Dear,everyone,

I designed a board with imx6s + lpddr2。The uboot can booting now，but the kernel is hanging at "Uncompressing Linux... done, booting the kernel".The uboot output log , DCD config table and Schematic ,pls refer to the attachment. and give me some advise!.Best Regards,

Original Attachment has been moved to: uboot-log.txt.zip

Original Attachment has been moved to: imximage_mx6dl.cfg.zip

Re: IMX6S + LPDDR2

igorpadykov — Tue, 25 Jul 2017 23:40:14 GMT

Hi zhang

please run ddr test and update *.cfg file with new calibration settings found from test

https://community.nxp.com/docs/DOC-105652

Best regards
igor
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Re: IMX6S + LPDDR2

zhanghaijian — Tue, 08 Aug 2017 03:09:29 GMT

Hello igor,

I tested the memory with the “i.MX6/7 DDR Stress Test Tool V2.70”，The output log is：

============================================

DDR Stress Test (2.6.0)

Build: Aug 1 2017, 17:33:18

NXP Semiconductors.

============================================

Chip ID

CHIP ID = i.MX6 Solo/DualLite (0x61)

Internal Revision = TO1.2

============================================

Boot Configuration

SRC_SBMR1(0x020d8004) = 0x00001040

SRC_SBMR2(0x020d801c) = 0x22000001

============================================

ARM Clock set to 1GHz

============================================

DDR configuration

BOOT_CFG3[5-4]: 0x00, Single DDR channel.

DDR type is LPDDR2 in 1-channel mode.

Data width: 32, bank num: 8

Row size: 14, col size: 10

Both chip select CSD0 and CSD1 are used

Density per chip select: 512MB

Density per channel: 1024MB

============================================

Current Temperature: 59

============================================

DDR Freq: 396 MHz

Note: Array result[] holds the DRAM test result of each byte.

0: test pass. 1: test fail

4 bits respresent the result of 1 byte.

result 0001:byte 0 fail.

result 0011:byte 0, 1 fail.

Starting Read calibration...

ABS_OFFSET=0x00000000 result[00]=0x1111

ABS_OFFSET=0x04040404 result[01]=0x1111

ABS_OFFSET=0x08080808 result[02]=0x1111

ABS_OFFSET=0x0C0C0C0C result[03]=0x1111

ABS_OFFSET=0x10101010 result[04]=0x1111

ABS_OFFSET=0x14141414 result[05]=0x1111

ABS_OFFSET=0x18181818 result[06]=0x1111

ABS_OFFSET=0x1C1C1C1C result[07]=0x1111

ABS_OFFSET=0x20202020 result[08]=0x1111

ABS_OFFSET=0x24242424 result[09]=0x1111

ABS_OFFSET=0x28282828 result[0A]=0x1111

ABS_OFFSET=0x2C2C2C2C result[0B]=0x1111

ABS_OFFSET=0x30303030 result[0C]=0x1111

ABS_OFFSET=0x34343434 result[0D]=0x1111

ABS_OFFSET=0x38383838 result[0E]=0x1111

ABS_OFFSET=0x3C3C3C3C result[0F]=0x1111

ABS_OFFSET=0x40404040 result[10]=0x1111

ABS_OFFSET=0x44444444 result[11]=0x1111

ABS_OFFSET=0x48484848 result[12]=0x1111

ABS_OFFSET=0x4C4C4C4C result[13]=0x1111

ABS_OFFSET=0x50505050 result[14]=0x1111

ABS_OFFSET=0x54545454 result[15]=0x1111

ABS_OFFSET=0x58585858 result[16]=0x1111

ABS_OFFSET=0x5C5C5C5C result[17]=0x1111

ABS_OFFSET=0x60606060 result[18]=0x1111

ABS_OFFSET=0x64646464 result[19]=0x1111

ABS_OFFSET=0x68686868 result[1A]=0x1111

ABS_OFFSET=0x6C6C6C6C result[1B]=0x1111

ABS_OFFSET=0x70707070 result[1C]=0x1111

ABS_OFFSET=0x74747474 result[1D]=0x1111

ABS_OFFSET=0x78787878 result[1E]=0x1111

ABS_OFFSET=0x7C7C7C7C result[1F]=0x1111

ERROR FOUND, we can't get suitable value !!!!

dram test fails for all values.

Error: failed during ddr calibration

Best Regards.

Re: IMX6S + LPDDR2

igorpadykov — Tue, 08 Aug 2017 10:43:23 GMT

Hi zhang

for error descriptions please check

Freescale i.MX6 DRAM Port Application Guide-DDR3

and FAQ section on:

i.MX6/7 DDR Stress Test Tool V2.70

Best regards
igor

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