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Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option

From Fabio Estevam <festevam@gmail.com>
Newsgroups linux.kernel
Subject Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option
Date 2017-06-14 21:20 +0200
Message-ID <tSlZE-Jv-15@gated-at.bofh.it> (permalink)
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On Wed, Jun 14, 2017 at 2:52 AM, Schöfegger Stefan
<Stefan.Schoefegger@ginzinger.com> wrote:

> device). The bitrate and de-emphasis must be switched. The driver (without
> this patches) does not allow to switch to gen2 because it falls back to gen1.
> It is impossible to generate the gen2 test pattern.

If you pass 'fsl,max-link-speed = <2>;' in your device tree, then it
will allow gen2.

From Documentation/devicetree/bindings/pci/fsl,imx6q-pcie.txt:

"- fsl,max-link-speed: Specify PCI gen for link capability. Must be '2' for
  gen2, otherwise will default to gen1. Note that the IMX6 LVDS clock outputs
  do not meet gen2 jitter requirements and thus for gen2 capability a gen2
  compliant clock generator should be used and configured."

Wouldn't this solve the problem?

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Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Bjorn Helgaas <helgaas@kernel.org> - 2017-06-13 01:50 +0200
  RE: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Richard Zhu <hongxing.zhu@nxp.com> - 2017-06-13 04:10 +0200
    Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Schöfegger Stefan          <Stefan.Schoefegger@ginzinger.com> - 2017-06-13 08:00 +0200
  Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Schöfegger Stefan          <Stefan.Schoefegger@ginzinger.com> - 2017-06-13 07:50 +0200
    Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Bjorn Helgaas <helgaas@kernel.org> - 2017-06-13 16:00 +0200
      Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Schöfegger Stefan          <Stefan.Schoefegger@ginzinger.com> - 2017-06-14 08:00 +0200
        Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Fabio Estevam <festevam@gmail.com> - 2017-06-14 21:20 +0200
          Re: [PATCH v2 1/1] PCI: imx6: Add pcie compliance test option Schöfegger Stefan          <Stefan.Schoefegger@ginzinger.com> - 2017-06-19 08:50 +0200

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