linux-kernel - Re: [PATCH 0/9] Add legacy i.MX PCIe EP mode supports

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Date:   Wed, 2 Aug 2023 08:51:37 +0200
From:   Ahmad Fatoum <a.fatoum@...gutronix.de>
To:     Richard Zhu <hongxing.zhu@....com>, l.stach@...gutronix.de,
        shawnguo@...nel.org, lpieralisi@...nel.org, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org
Cc:     devicetree@...r.kernel.org, linux-pci@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-imx@....com,
        kernel@...gutronix.de, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 0/9] Add legacy i.MX PCIe EP mode supports

Hello Richard,

On 02.08.23 08:06, Richard Zhu wrote:
> Add legacy 32bit i.MX PCIe EP mode support
> 
> The PCI controller contained in i.MX6/7 legacy SOCs is one dual mode
> PCIe controller, and can work either as RC or EP.
> 
> This series add i.MX6/7 PCIe EP mode supports. And had been verified
> on i.MX6 sabresd and i.MX7 SDB boards.
> 
> In the verification, one board PCIe is used as RC, the other one is used
> as EP.
> Use the cross TX/RX differential cable connect the two PCIe ports of
> these two boards.
> 
> +-----------+                +------------+
> |   PCIe TX |<-------------->|PCIe RX     |
> |           |                |            |
> |    Board  |                |    Board   |
> |           |                |            |
> |   PCIe RX |<-------------->|PCIe TX     |
> +-----------+                +------------+

I am curious what software you are running on both sides to test?
Do you use CONFIG_PCI_EPF_TEST? What do you run on RC side?

Thanks,
Ahmad

> 
> [PATCH 1/9] dt-bindings: PCI: fsl,imx6q: Add i.MX6Q and i.MX6QP PCIe
> [PATCH 2/9] dt-bindings: PCI: fsl,imx6q: Add i.MX6SX PCIe EP
> [PATCH 3/9] dt-bindings: PCI: fsl,imx6q: Add i.MX7D PCIe EP
> [PATCH 4/9] arm: dts: nxp: Add i.MX6QDL and i.MX6QP PCIe EP supports
> [PATCH 5/9] arm: dts: nxp: Add i.MX6SX PCIe EP support
> [PATCH 6/9] arm: dts: nxp: Add i.MX7D PCIe EP support
> [PATCH 7/9] PCI: imx6: Add i.MX6Q and i.MX6QP PCIe EP supports
> [PATCH 8/9] PCI: imx6: Add i.MX6SX PCIe EP support
> [PATCH 9/9] PCI: imx6: Add i.MX7D PCIe EP support
> 
> Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-ep.yaml | 50 +++++++++++++++++++++++++++++++++++++++++----
> arch/arm/boot/dts/nxp/imx/imx6qdl.dtsi                       | 14 +++++++++++++
> arch/arm/boot/dts/nxp/imx/imx6qp.dtsi                        |  4 ++++
> arch/arm/boot/dts/nxp/imx/imx6sx.dtsi                        | 17 +++++++++++++++
> arch/arm/boot/dts/nxp/imx/imx7d.dtsi                         | 27 ++++++++++++++++++++++++
> drivers/pci/controller/dwc/pci-imx6.c                        | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
> 6 files changed, 200 insertions(+), 5 deletions(-)
> 
> 
> 

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