topic Re: Configuring the kernel for RC/EP communication in i.MX Processors

Configuring the kernel for RC/EP communication

sebastiancabot — Wed, 02 Mar 2016 14:20:34 GMT

Hello.

I am trying to implement implement a pcie connection between two iMX6 based cards.

I saw the article about EC/RC validation which refers to an older kernel and cannot be used as is on the kernel I am using 3.14.60

Can someone please explain the proper use of:

CONFIG_RC_MODE_IN_EP_RC_SYS

CONFIG_EP_MODE_IN_EP_RC_SYS

Thank you

Re: Configuring the kernel for RC/EP communication

Yuri — Fri, 11 Mar 2016 09:17:08 GMT

Hello,

Generally i.MX6 Linux BSP supports PCie Root Complex mode,

as described in Chapter 41 (i.MX 6 PCI Express Root Complex Driver)

of the recent BSP. Just for tests, BSP may support one endpoint function,

which is enabled via the config option CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS.

You may try to enable the config option

"CONFIG_IMX_PCIE_EP_MODE_IN_EP_RC_SYS=y".

Also the following may be helpful.

Changing the Kernel configuration for i.MX6 SABRE

Have a great day,
Yuri

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Re: Configuring the kernel for RC/EP communication

niklasmolin — Thu, 19 Jan 2017 22:35:31 GMT

Hi Yuri.

What does the CONFIG_RC_MODE_IN_EP_RC_SYS do?

Does this one have to be set if I want the ARM to run in root complex mode?

I just want to be able to communicate between the ARM and one external EP. I assume I still need to set the ARM in RC mode?

Thanks,

Niklas