PCI enable Imx8mq

saurav-pandya — Mon, 24 Jan 2022 10:19:52 GMT

Hi ,

I am working on imx8mq-evk board to enable PCIe. There are no change in kernel configuration and device tree. no any device connected on PCI interface. I have got below error.

dmesg | grep -i pci
[ 0.113690] PCI: CLS 0 bytes, default 64
[ 1.343993] ehci-pci: EHCI PCI platform driver
[ 1.360140] ohci-pci: OHCI PCI platform driver
[ 2.277939] imx6q-pcie 33800000.pcie: 33800000.pcie supply epdev_on not found, using dummy regulator
[ 2.278507] imx6q-pcie 33c00000.pcie: 33c00000.pcie supply epdev_on not found, using dummy regulator
[ 2.313172] imx6q-pcie 33800000.pcie: PCIe PLL locked after 0 us.
[ 2.321612] imx6q-pcie 33800000.pcie: host bridge /soc@0/pcie@33800000 ranges:
[ 2.324620] imx6q-pcie 33c00000.pcie: PCIe PLL locked after 0 us.
[ 2.324663] imx6q-pcie 33c00000.pcie: host bridge /soc@0/pcie@33c00000 ranges:
[ 2.324675] imx6q-pcie 33c00000.pcie: No bus range found for /soc@0/pcie@33c00000, using [bus 00-ff]
[ 2.324704] imx6q-pcie 33c00000.pcie: IO 0x27f80000..0x27f8ffff -> 0x00000000
[ 2.324735] imx6q-pcie 33c00000.pcie: MEM 0x20000000..0x27efffff -> 0x20000000
[ 2.334390] imx6q-pcie 33800000.pcie: IO 0x1ff80000..0x1ff8ffff -> 0x00000000
[ 2.347711] imx6q-pcie 33800000.pcie: MEM 0x18000000..0x1fefffff -> 0x18000000
[ 3.327518] imx6q-pcie 33c00000.pcie: Phy link never came up
[ 3.333234] imx6q-pcie 33c00000.pcie: failed to initialize host
[ 3.339177] imx6q-pcie 33c00000.pcie: unable to add pcie port.
[ 3.369938] imx6q-pcie 33800000.pcie: Phy link never came up
[ 3.375643] imx6q-pcie 33800000.pcie: failed to initialize host
[ 3.381587] imx6q-pcie 33800000.pcie: unable to add pcie port.

Please help me for this issue resolve.

Thanks,

Saurav

Re: PCI enable Imx8mq

jamesbone — Mon, 07 Feb 2022 23:32:40 GMT

it is necessary to attach some device to board pcie connector

to see link up linux messages.

May be useful to check i.MX8MDQLQ EVK Board Hardware User's Guide

https://www.nxp.com/docs/en/user-guide/IMX8MDQLQEVKHUG.pdf

i.MX ProcessorsのトピックRe: PCI enable Imx8mq

PCI enable Imx8mq

Re: PCI enable Imx8mq