On Thu, Feb 24, 2022 at 07:50:09AM +0000, Hongxing Zhu wrote:

quoted

-----Original Message-----
From: Bjorn Helgaas <helgaas@kernel.org>
Sent: 2022年2月24日 1:40
To: Hongxing Zhu <hongxing.zhu@nxp.com>
Cc: l.stach@pengutronix.de; bhelgaas@google.com; broonie@kernel.org;
lorenzo.pieralisi@arm.com; jingoohan1@gmail.com; festevam@gmail.com;
francesco.dolcini@toradex.com; linux-pci@vger.kernel.org;
linux-arm-kernel@lists.infradead.org; linux-kernel@vger.kernel.org;
kernel@pengutronix.de; dl-linux-imx [off-list ref]
Subject: Re: [PATCH v7 8/8] PCI: imx6: Add the compliance tests mode support

quoted

Is this a reference to a spec?  If so, I can't tell the name of the spec, the
revision, or the section number.

Yes, it is a reference to a spec. How about change them to the following?

PCI: imx6: Add compliance tests mode support

Refer to the Chapter 3.2 System Board Signal Quality of PCI Express
Architecture PHY Test Specification Revision 2.0.

Signal quality tests (for example: jitter, differential eye opening and
so on) can be executed with devices in the polling.compliance state.

To let the device support polling.compliance state, the clocks and powers
shouldn't be turned off when the probe of device driver fails.

Based on CLB (Compliance Load Board) Test Fixture and so on test
equipments, the PHY link would be down during the compliance tests.
Refer to this scenario, add the i.MX PCIe compliance tests mode enable
support, and keep the clocks and powers on, and finish the driver probe
without error return.

Use the "pci_imx6.compliance=1" in kernel command line to enable the
compliance tests mode.

Sounds good, thanks.

_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel