J721EXSOMXEVM: PROCESSOR-SDK-J721E

Murphy Bevan

Part Number: J721EXSOMXEVM

Hi,

TI, support team.

Q1: Which registers control PCIe speed in DRV829 SoC TRM ?

Q2: how to change PCIe speed via terminal-console(like devmem cmd to re-write the preferred value into specified registers)?

Best Regards,

Murphy

over 3 years ago

0 jian35385 over 3 years ago

TI__Mastermind 23125 points

Murphy,

You can either use device tree file to set the SERDES speed when it is initialized by the driver, or use "setpci" command to modify the link control register, then retrain. someone wrote a script:

alexforencich.com/.../force-gen2

that you can reference.

Jian

Processors

Processors forum

J721EXSOMXEVM: PROCESSOR-SDK-J721E