TDA4VM-Q1: TDA4VM-Q1

Chaitanya Satuluri

Part Number: TDA4VM-Q1
Other Parts Discussed in Thread: TDA4VM

Hi,

We are seeing an abnormal Reset behavior with our custom TDA4VM board where in the the board successfully doesn't boot until we manually press the warm or cold reset switches. whenever we power on the board the log comes and stays below until we press the cold MCU RESET switch button

also we cross verified the MCU_PORZ and PORZ signals during power up sequence which will be held low till all power supplies and main clock is stable as per data manual and PDN document. The reset inputs are asserted high in our custom board after all power supplies stable and clock is presented.

any thoughts or feedback is much appreciated.

''U-Boot SPL 2021.01-g687404c9b-dirty (Jan 20 2022 - 12:26:22 +0530)

Model: Texas Instruments K3 J721E SoC

EEPROM not available at 0x50, trying to read at 0x51

Reading on-board EEPROM at 0x51 failed 1

Board: J721EX-PM1-SOM rev E2

SYSFW ABI: 3.1 (firmware rev 0x0015 '21.5.0--v2021.05 (Terrific Llam')

EEPROM not available at 0x50, trying to read at 0x51

Reading on-board EEPROM at 0x51 failed 1

Trying to boot from SPI''

Regards,

Chaitanya

over 3 years ago

0 Keerthy J over 3 years ago

TI__Guru**** 162640 points

Hi Chaianya,

Which is the OSPI part on your board? is it different compared to what we have on standard TI TDA4VM board?

- Keerthy

0 Chaitanya Satuluri over 3 years ago in reply to Keerthy J

Prodigy 185 points

Hi Keerthy,

Apologies for the delay in reply. we are using MT35XU512ABA1G12-0AUT part in our design and the snippet of our OSPI schematics are here

Regards,

Chaitanya

0 Keerthy J over 3 years ago in reply to Chaitanya Satuluri

TI__Guru**** 162640 points

Hi Chaitanya,

We have a similar part on the EVM.

Are you able to boot to U-Boot prompt?

Also just to understand the issue:

Chaitanya Satuluri said:
Trying to boot from SPI''

It gets stuck here and you have to manually reset?

- Keerthy

0 Chaitanya Satuluri over 3 years ago in reply to Keerthy J

Prodigy 185 points

HI Keerthy,

Yes, we need to manually press the reset button to boot the board. every time we power on our board the board hangs or stops at ''Trying to boot from SPI'.

also we have captured the reset sequence of our custom board, it seems there is no major issue with the reset sequence. attached is the waveform of reset behavior of our custom board.

is there any Phy tuning required according to our custom board?

Regards,

Chaitanya

0 Chaitanya Satuluri over 3 years ago in reply to Chaitanya Satuluri

Prodigy 185 points

Hi Keerthy,

Any further update on below. also tell us any calibration pattern we need to flash for successful boot? since we are not performing any calibration during OSPI boot.

Regards,

Chaitanya

0 Chaitanya Satuluri over 3 years ago in reply to Chaitanya Satuluri

Prodigy 185 points

Hi Keerthy,

Any further update on the above issue?

also we have observed a behavior in our custom board. when we have flashed the images or binaries taken from ti-processor-sdk-linux-j7-evm-08_00_00_08/board-support/host-tools/k3-bootswitch/bin/j721e-evm the custom board boots without issue means its not stopping at ''Trying to boot from SPI''. we are not sure what is the difference of code and binary.

also we have seen during boot the OSPI controller seems have multiple clocks to communicate with OSPI memory device. is there any PHY tuning needs to performed on our custom TDA4VM board for successful boots? Please provide your thoughts on the same.

Regards,

Chaitanya

0 Keerthy J over 3 years ago in reply to Chaitanya Satuluri

TI__Guru**** 162640 points

Hi Chaitanya,

https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/08_01_00_07/exports/docs/linux/Foundational_Components/U-Boot/UG-QSPI.html

Can you check the Phy calibration section:

BTW if 08_00_00_08 is working well. Which is the failing release? Is it failing with latest 8.1 Release?

- Keerthy

0 Chaitanya Satuluri over 3 years ago in reply to Keerthy J

Prodigy 185 points

Hi Keerthy,

Thanks for the pointers. we have tried as per above instructions but it didnt help in our custom board.

also we have root caused the issue with DDR speed. we are using MT53D1024M32D4DT046 AUT:D chip in our design and speed we have set is 4266 MT/s. with the full speed we are facing power on OSPI boot issues. we have reduced the DDR speed to 3733 Mt/s and the issue is disaappeared in our custom TDA4Vm board. we are able to sucessfully boot the board without having any issues.

could you please provide us some pointers how to do training of LPDDR4x memory to support 4266MT/s with our custom board.

Regards,

Chaitanya

0 Keerthy J over 3 years ago in reply to Chaitanya Satuluri

TI__Guru**** 162640 points

Hi Chaitanya,

Great. So the issue is route caused to higher 4266 MTS DDR Speed. I will let my our DDR expert respond on this.

- Keerthy

0 Chaitanya Satuluri over 3 years ago in reply to Keerthy J

Prodigy 185 points

Hi Keerthy,

Yes, DDR speed is the issue in our custom board. we are using XJ721E5BALF SOC part in our design or our board. w.r.t datasheet its not clear to me what are the DDR speed is allowed for thease superset parts. could you provide advise me in addition to DDR tuning.

Regards,

CHaitanya

0 Kevin S over 3 years ago in reply to Chaitanya Satuluri

TI__Mastermind 38220 points

Hi Chaitanya,

What version of the XLS tool are you using to generate the 4266 data rate register settings?
What version of the SDK are you using?

Thanks,
Kevin

0 Chaitanya Satuluri over 3 years ago in reply to Kevin S

Prodigy 185 points

Hi kevin

here are my answers for the queries

- What version of the XLS tool are you using to generate the 4266 data rate register settings?

[Chaitanya]: SPRACU8_Jacinto7_DDRSS_RegConfigTool . version is 0.6.0

- What version of the SDK are you using?

[Chaitanya] version 8.1 on HS platform

Regards,

Chaitanya

0 Kevin S over 3 years ago in reply to Chaitanya Satuluri

TI__Mastermind 38220 points

Hi Chaitanya,

Can you please try the following manual changes to your DTSI file?

For below registers, change the '7' to a '6' as shown below

#define DDRSS_PHY_33_DATA 0x0C002006
#define DDRSS_PHY_289_DATA 0x0C002006
#define DDRSS_PHY_545_DATA 0x0C002006
#define DDRSS_PHY_801_DATA 0x0C002006

For below registers, change the '20' to a '40' as shown below

#define DDRSS_PHY_32_DATA 0x10400000
#define DDRSS_PHY_288_DATA 0x10400000
#define DDRSS_PHY_544_DATA 0x10400000
#define DDRSS_PHY_800_DATA 0x10400000

Thanks,
Kevin

+1 Chaitanya Satuluri over 3 years ago in reply to Kevin S

Prodigy 185 points

Hi Kevin,

Thanks for the reply.

we have updated the DTSI file with the above changes and tested in the board and it seems working for us. we will try in multiple boards now and let you know the results.

Meantime could you guide me or help me what are thease register changes and why we need to apply? will above changes impact any performance?

regards,

Chaitanya

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TDA4VM-Q1: TDA4VM-Q1