IMX8QM MEK: Any way to select the ITS as the MSI target for PCIe devices?

[carloscs11]

I am using the IMX8QM MEK board and I need to configure the MSI interrupts generated by the PCIe devices to target the TRANSLATER register in the ITS.

Is it possible? Do Linux drivers support it?

From what I searched, there's some information saying that MSIs are converted into line-based interrupts by the embedded MSI controller in the PCIe Controller. Basically, I receive interrupt 102 every time a device generates an MSI, which is an SPI. I am trying to understand the process behind MSI generation in the PCIe controller but the documentation isn't explicit about it.

There's also a lack of information related to this configuration in the device tree.

I would appreciate any help given!

Thank you.

[Bio_TICFSL]

Hello,

Check hardware using Table 11. PCIe recommendations  https://www.nxp.com/webapp/sps/download/preDownload.jsp?render=true

May be suggested to test with several PCIe cards and check PCIe signals quality using

AN12444 https://www.nxp.com/docs/en/application-note/AN12444.pdf

Regards