Setting of equalizer and emphasis in i.MX6 PCIe

[ko-hey]

Hi all

My customer is using i.MX6DL and have a problem with PCIe.

Their waveform sometime out of PCIe specification due to the noise.

I guess that it can resolve the problem using the equalizer and emphasis.

However, I don't know the register for setting the equalizer and emphasis.

Which register can set the equalizer and emphasis value of PCIe ?

Ko-hey

[Yuri]

Hello

  Please check PCIe signals, using the the following discussion

"PCIe, diagnosing and improving eye diagram"

< https://community.freescale.com/message/537250#537250 >

Also, please try adjust parameters of PCIe_PHY by changing the IOMUXC_GPR8 register.

You may refer to app note AN4784

< http://cache.nxp.com/files/32bit/doc/app_note/AN4784.pdf >

Have a great day,
Yuri

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[ko-hey]

Hello Yuri

Thank you for reply.

My customer also have a link error.

Do you think can they avoid the link error when they adjust the register ?

Ko-hey

[Yuri]

Hello,

  At least, as the first important step - it is needed to get good data and clock signals. 

Regards,

Yuri.

[MichaelV]

IOMUXC GPR8

[ko-hey]

Is the bit only ?

Ko-hey