iMX6 DDR3 Stress Test calibration tool problems

ottob · ‎11-24-2014

Hello There,

We have a custom board very similar to the imx6q SabreSD reference design. DDR3 components and schematic are identical, but layout is somewhat different in that we have all 4 chips on the top of the board. The board boots up and runs using the SabreSD DDR calibration values provided in the Yocto U-boot & Kernel, but we are seeing some instability problems so we tried running the DDR3 Stress Tester 1.0.3. Using the MX6Q_SabreSD_DDR3_register_programming_aid_v1.5.inc file we are not able to run the write leveling successfully. It comes back with values, but the subsequent DQS Gating calibration and DDR stress test fails. However, if the write leveling calibration is skipped the DQS gating calibration and the stress test runs OK (528Mhz). I tried setting different values for WALAT as suggested elsewhere on the forum, but with the same outcome. See logs below

I'm not sure what this means or what to do at this points, so any help is appreciated

Thanks,

/Otto

-----------------------------------

//WALAT Settings

setmem /32 0x021b0018 = 0x00001740 // MMDC0_MDMISC //0x40001740 WALAT 0

//setmem /32 0x021b0018 = 0x00011740 // MMDC0_MDMISC //0x40001740 WALAT 1

//setmem /32 0x021b0018 = 0x00021740 // MMDC0_MDMISC //0x40001740 WALAT 2

//setmem /32 0x021b0018 = 0x00031740 // MMDC0_MDMISC //0x40001740 WALAT 3

---------------------------------------

--------------------------------------------------------

Stress-test running Write Level calibration

******************************

DDR Stress Test (1.0.3) for MX6DQ

Build: Jun 25 2014, 12:09:21

Freescale Semiconductor, Inc.

******************************

=======DDR configuration==========

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

DDR type is DDR3

Data width: 64, bank num: 8

Row size: 14, col size: 10

Chip select CSD0 is used

Density per chip select: 1024MB

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

What ARM core speed would you like to run?

Type 0 for 650MHz, 1 for 800MHz, 2 for 1GHz, 3 for 1.2GHz

ARM set to 1.2GHz

Please select the DDR density per chip select (in bytes) on the board

Type 0 for 2GB; 1 for 1GB; 2 for 512MB; 3 for 256MB; 4 for 128MB; 5 for 64MB; 6 for

For maximum supported density (4GB), we can only access up to 3.75GB. Type 9 to se

DDR density selected (MB): 1024

Calibration will run at DDR frequency 528MHz. Type 'y' to continue.

If you want to run at other DDR frequency. Type 'n'

DDR Freq: 528 MHz

Would you like to run the write leveling calibration? (y/n)

Please enter the MR1 value on the initilization script

This will be re-programmed into MR1 after write leveling calibration

Enter as a 4-digit HEX value, example 0004, then hit enter

0004 You have entered: 0x0004

Start write leveling calibration

Write leveling calibration completed

MMDC_MPWLDECTRL0 ch0 after write level cal: 0x017F017F

MMDC_MPWLDECTRL1 ch0 after write level cal: 0x0004017B

MMDC_MPWLDECTRL0 ch1 after write level cal: 0x017F0013

MMDC_MPWLDECTRL1 ch1 after write level cal: 0x017F000A

Would you like to run the DQS gating, read/write delay calibration? (y/n)

Starting DQS gating calibration...

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

dram test fails for all values.

The DDR stress test can run with an incrementing frequency or at a static freq

To run at a static freq, simply set the start freq and end freq to the same value

Would you like to run the DDR Stress Test (y/n)?

Enter desired START freq (135 to 672 MHz), then hit enter.

Note: DDR3 minimum is ~333MHz, do not recommend to go too much below this.

500

The freq you entered was: 500

Enter desired END freq (135 to 672 MHz), then hit enter.

Make sure this is equal to or greater than start freq

600

The freq you entered was: 600

Beginning stress test

loop: 1

DDR Freq: 500 MHz

t0.1: data is addr test

Address of failure: 0x10000000

Data was: 0x00aa00aa

But pattern should match address

--------------------------------------------------------

Stress test running DQS Calibration & DDR Stress test

--------------------------------------------------------

******************************

DDR Stress Test (1.0.3) for MX6DQ

Build: Jun 25 2014, 12:09:21

Freescale Semiconductor, Inc.

******************************

=======DDR configuration==========

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

DDR type is DDR3

Data width: 64, bank num: 8

Row size: 14, col size: 10

Chip select CSD0 is used

Density per chip select: 1024MB

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

What ARM core speed would you like to run?

Type 0 for 650MHz, 1 for 800MHz, 2 for 1GHz, 3 for 1.2GHz

ARM set to 1.2GHz

Please select the DDR density per chip select (in bytes) on the board

Type 0 for 2GB; 1 for 1GB; 2 for 512MB; 3 for 256MB; 4 for 128MB; 5 for 64MB; 6 for

For maximum supported density (4GB), we can only access up to 3.75GB. Type 9 to se

DDR density selected (MB): 1024

Calibration will run at DDR frequency 528MHz. Type 'y' to continue.

If you want to run at other DDR frequency. Type 'n'

DDR Freq: 528 MHz

Would you like to run the write leveling calibration? (y/n)

You have chosen not to run the write level calibration

Would you like to run the DQS gating, read/write delay calibration? (y/n)

Starting DQS gating calibration...

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . .

BYTE 0:

Start: HC=0x01 ABS=0x00

End: HC=0x04 ABS=0x48

Mean: HC=0x02 ABS=0x63

End-0.5*tCK: HC=0x03 ABS=0x48

Final: HC=0x03 ABS=0x48

BYTE 1:

Start: HC=0x01 ABS=0x64

End: HC=0x04 ABS=0x3C

Mean: HC=0x03 ABS=0x10

End-0.5*tCK: HC=0x03 ABS=0x3C

Final: HC=0x03 ABS=0x3C

BYTE 2:

Start: HC=0x00 ABS=0x70

End: HC=0x04 ABS=0x28

Mean: HC=0x02 ABS=0x4C

End-0.5*tCK: HC=0x03 ABS=0x28

Final: HC=0x03 ABS=0x28

BYTE 3:

Start: HC=0x01 ABS=0x54

End: HC=0x04 ABS=0x2C

Mean: HC=0x02 ABS=0x7F

End-0.5*tCK: HC=0x03 ABS=0x2C

Final: HC=0x03 ABS=0x2C

BYTE 4:

Start: HC=0x01 ABS=0x00

End: HC=0x04 ABS=0x44

Mean: HC=0x02 ABS=0x61

End-0.5*tCK: HC=0x03 ABS=0x44

Final: HC=0x03 ABS=0x44

BYTE 5:

Start: HC=0x01 ABS=0x6C

End: HC=0x04 ABS=0x44

Mean: HC=0x03 ABS=0x18

End-0.5*tCK: HC=0x03 ABS=0x44

Final: HC=0x03 ABS=0x44

BYTE 6:

Start: HC=0x01 ABS=0x4C

End: HC=0x04 ABS=0x14

Mean: HC=0x02 ABS=0x6F

End-0.5*tCK: HC=0x03 ABS=0x14

Final: HC=0x03 ABS=0x14

BYTE 7:

Start: HC=0x01 ABS=0x00

End: HC=0x04 ABS=0x40

Mean: HC=0x02 ABS=0x5F

End-0.5*tCK: HC=0x03 ABS=0x40

Final: HC=0x03 ABS=0x40

DQS calibration MMDC0 MPDGCTRL0 = 0x433C0348, MPDGCTRL1 = 0x032C0328

DQS calibration MMDC1 MPDGCTRL0 = 0x43440344, MPDGCTRL1 = 0x03400314

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 00000001:byte 0 fail.

result 00000011:byte 0, 1 fail.

Starting Read calibration...

ABS_OFFSET=0x00000000 result[00]=0x11111111

ABS_OFFSET=0x04040404 result[01]=0x11111111

ABS_OFFSET=0x08080808 result[02]=0x11111111

ABS_OFFSET=0x0C0C0C0C result[03]=0x11111111

ABS_OFFSET=0x10101010 result[04]=0x11011111

ABS_OFFSET=0x14141414 result[05]=0x00011001

ABS_OFFSET=0x18181818 result[06]=0x00001000

ABS_OFFSET=0x1C1C1C1C result[07]=0x00000000

ABS_OFFSET=0x20202020 result[08]=0x00000000

ABS_OFFSET=0x24242424 result[09]=0x00000000

ABS_OFFSET=0x28282828 result[0A]=0x00000000

ABS_OFFSET=0x2C2C2C2C result[0B]=0x00000000

ABS_OFFSET=0x30303030 result[0C]=0x00000000

ABS_OFFSET=0x34343434 result[0D]=0x00000000

ABS_OFFSET=0x38383838 result[0E]=0x00000000

ABS_OFFSET=0x3C3C3C3C result[0F]=0x00000000

ABS_OFFSET=0x40404040 result[10]=0x00000000

ABS_OFFSET=0x44444444 result[11]=0x00000000

ABS_OFFSET=0x48484848 result[12]=0x00000000

ABS_OFFSET=0x4C4C4C4C result[13]=0x00000000

ABS_OFFSET=0x50505050 result[14]=0x01000100

ABS_OFFSET=0x54545454 result[15]=0x11000111

ABS_OFFSET=0x58585858 result[16]=0x11100111

ABS_OFFSET=0x5C5C5C5C result[17]=0x11101111

ABS_OFFSET=0x60606060 result[18]=0x11111111

ABS_OFFSET=0x64646464 result[19]=0x11111111

ABS_OFFSET=0x68686868 result[1A]=0x11111111

ABS_OFFSET=0x6C6C6C6C result[1B]=0x11111111

ABS_OFFSET=0x70707070 result[1C]=0x11111111

ABS_OFFSET=0x74747474 result[1D]=0x11111111

ABS_OFFSET=0x78787878 result[1E]=0x11111111

ABS_OFFSET=0x7C7C7C7C result[1F]=0x11111111

MMDC0 MPRDDLCTL = 0x3A303234, MMDC1 MPRDDLCTL = 0x3230323A

Starting Write calibration...

ABS_OFFSET=0x00000000 result[00]=0x11111111

ABS_OFFSET=0x04040404 result[01]=0x10111111

ABS_OFFSET=0x08080808 result[02]=0x10111111

ABS_OFFSET=0x0C0C0C0C result[03]=0x10110111

ABS_OFFSET=0x10101010 result[04]=0x10100010

ABS_OFFSET=0x14141414 result[05]=0x00100010

ABS_OFFSET=0x18181818 result[06]=0x00100000

ABS_OFFSET=0x1C1C1C1C result[07]=0x00100000

ABS_OFFSET=0x20202020 result[08]=0x00000000

ABS_OFFSET=0x24242424 result[09]=0x00000000

ABS_OFFSET=0x28282828 result[0A]=0x00000000

ABS_OFFSET=0x2C2C2C2C result[0B]=0x00000000

ABS_OFFSET=0x30303030 result[0C]=0x00000000

ABS_OFFSET=0x34343434 result[0D]=0x00000000

ABS_OFFSET=0x38383838 result[0E]=0x00000000

ABS_OFFSET=0x3C3C3C3C result[0F]=0x00000000

ABS_OFFSET=0x40404040 result[10]=0x00000000

ABS_OFFSET=0x44444444 result[11]=0x00000000

ABS_OFFSET=0x48484848 result[12]=0x00000000

ABS_OFFSET=0x4C4C4C4C result[13]=0x00000000

ABS_OFFSET=0x50505050 result[14]=0x00000000

ABS_OFFSET=0x54545454 result[15]=0x00000000

ABS_OFFSET=0x58585858 result[16]=0x00000000

ABS_OFFSET=0x5C5C5C5C result[17]=0x00000000

ABS_OFFSET=0x60606060 result[18]=0x00000000

ABS_OFFSET=0x64646464 result[19]=0x00000000

ABS_OFFSET=0x68686868 result[1A]=0x00000101

ABS_OFFSET=0x6C6C6C6C result[1B]=0x01001111

ABS_OFFSET=0x70707070 result[1C]=0x01001111

ABS_OFFSET=0x74747474 result[1D]=0x11001111

ABS_OFFSET=0x78787878 result[1E]=0x11011111

ABS_OFFSET=0x7C7C7C7C result[1F]=0x11111111

MMDC0 MPWRDLCTL = 0x3A3A403A,MMDC1 MPWRDLCTL = 0x42364C42

MMDC registers updated from calibration

Read DQS Gating calibration

MPDGCTRL0 PHY0 (0x021b083c) = 0x433C0348

MPDGCTRL1 PHY0 (0x021b0840) = 0x032C0328

MPDGCTRL0 PHY1 (0x021b483c) = 0x43440344

MPDGCTRL1 PHY1 (0x021b4840) = 0x03400314

Read calibration

MPRDDLCTL PHY0 (0x021b0848) = 0x3A303234

MPRDDLCTL PHY1 (0x021b4848) = 0x3230323A

Write calibration

MPWRDLCTL PHY0 (0x021b0850) = 0x3A3A403A

MPWRDLCTL PHY1 (0x021b4850) = 0x42364C42

The DDR stress test can run with an incrementing frequency or at a static freq

To run at a static freq, simply set the start freq and end freq to the same value

Would you like to run the DDR Stress Test (y/n)?

Enter desired START freq (135 to 672 MHz), then hit enter.

Note: DDR3 minimum is ~333MHz, do not recommend to go too much below this.

528

The freq you entered was: 528

Enter desired END freq (135 to 672 MHz), then hit enter.

Make sure this is equal to or greater than start freq

650

The freq you entered was: 650

Beginning stress test

loop: 1

DDR Freq: 528 MHz

t0.1: data is addr test

t0: memcpy10 SSN x64 test

t1: memcpy8 SSN x64 test

t2: byte-wise SSN x64 test

t3: memcpy11 random pattern test

t4: IRAM_to_DDRv2 test

t5: IRAM_to_DDRv1 test

t6: read noise walking ones and zeros test

Yuri · ‎11-24-2014

As the memory test passed it is possible to use corresponding memory settings
for DRAM initialization for applications.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

View solution in original post

ottob · ‎11-24-2014

Update - The Stress test actually passes all the way up to the max 672Mhz. Does that mean I dont need to worry about the write leveling calibration ? Thanks, /Otto

Yuri · ‎11-24-2014

As the memory test passed it is possible to use corresponding memory settings
for DRAM initialization for applications.

Have a great day,
Yuri

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

iMX6 DDR3 Stress Test calibration tool problems

iMX6 DDR3 Stress Test calibration tool problems

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