How to enable PCIe in Yocto project on board i.MX6QP-SABRESD?

[uncoldice]

Hi,

I am using Yocto to build Linux image to run on i.mx6qp-sabresd board.

I set DISTRO = 'fsl-imx-fb' and built two types images: core-image-base and fsl-image-machine-test.

I booted the board with the images copied on SD card, and from log I found both of them not bringing up the PCIe controller.

The build procedure I am following the doc 'i.MX_Yocto_Project_User's_Guide.pdf', and I didn't apply any changes on the Yocto project.

Please help to inform:

1. If this release Yocto project support PCIe for this board?

2. If yes, how to enable the PCIe in Linux?

The Yocto version is 'NXP's 4.1.15-2.1.0 Yocto Project BSP', and I also attach the logs for your check.

Thank you very much.

Original Attachment has been moved to: fsl-imx-fb_fsl-image-machine-test.txt.zip

Original Attachment has been moved to: fsl_imx-fb_core-image-base.txt.zip

[uncoldice]

Hi igor,

Thanks for your reply.

According to your reply, I enabled the i.MX6 PCIe component in the menuconfig and rebuilt the image.

Now I can see the PCIe initialization message in the log. Unfortunately, it seems failed:

can: raw protocol (rev 20120528)
can: broadcast manager protocol (rev 20120528 t)
can: netlink gateway (rev 20130117) max_hops=1
Bluetooth: RFCOMM TTY layer initialized
Bluetooth: RFCOMM socket layer initialized
Bluetooth: RFCOMM ver 1.11
Bluetooth: BNEP (Ethernet Emulation) ver 1.3
Bluetooth: BNEP filters: protocol multicast
Bluetooth: BNEP socket layer initialized
Bluetooth: HIDP (Human Interface Emulation) ver 1.2
Bluetooth: HIDP socket layer initialized
8021q: 802.1Q VLAN Support v1.8
Key type dns_resolver registered
imx6q-pcie 1ffc000.pcie: phy link never came up
imx6q-pcie 1ffc000.pcie: failed to initialize host
imx6q-pcie: probe of 1ffc000.pcie failed with error -22
dhd_module_init in
input: gpio-keys as /devices/soc0/gpio-keys/input/input8
snvs_rtc 20cc000.snvs:snvs-rtc-lp: setting system clock to 1970-01-01 00:00:01 UTC (1)
VGEN2: disabling

My board name is : MCIMX6QP-SDB

Please help to check what is the problem.

Thank you very much.

[uncoldice]

Also attach the log for your reference

[igorpadykov]

Hi uncoldice

please try some other card, one can refer to

sect.40.4 Using PCIe Endpoint and Running Tests

attached Linux Manual for tested cards.

Best regards
igor

[uncoldice]

Yes it works after attaching a daughter PCIe card. Thanks for your help!

[igorpadykov · Accepted solution]

Hi uncoldice

PCIe is supported for this board, please refer to Chapter 40
PCI Express Root Complex Driver, sect.40.2.2 Kernel Configurations

attached Linux Manual. For validation please check

i.MX6Q PCIe EP/RC Validation System 

Best regards
igor
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