linux-kernel - Re: [PATCH 0/8] PCI: rockchip: Fix PCIe endpoint controller driver

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Date:   Thu, 26 Jan 2023 09:49:56 -0600
From:   Bjorn Helgaas <helgaas@...nel.org>
To:     Rick Wertenbroek <rick.wertenbroek@...il.com>
Cc:     alberto.dassatti@...g-vd.ch, xxm@...k-chips.com,
        wenrui.li@...k-chips.com, rick.wertenbroek@...g-vd.ch,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Shawn Lin <shawn.lin@...k-chips.com>,
        Lorenzo Pieralisi <lpieralisi@...nel.org>,
        Krzysztof Wilczyński <kw@...ux.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>,
        Jani Nikula <jani.nikula@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Mikko Kovanen <mikko.kovanen@...amobile.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-rockchip@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-pci@...r.kernel.org
Subject: Re: [PATCH 0/8] PCI: rockchip: Fix PCIe endpoint controller driver

On Thu, Jan 26, 2023 at 04:23:57PM +0100, Rick Wertenbroek wrote:
> Le jeu. 26 janv. 2023 à 15:52, Bjorn Helgaas <helgaas@...nel.org> a écrit :
> > Thanks very much for your work.
> >
> > On Thu, Jan 26, 2023 at 02:50:40PM +0100, Rick Wertenbroek wrote:
> > > This is a series of patches that fixes the PCIe endpoint controller driver
> > > for the Rockchip RK3399 SoC. It is based on Linux kernel 6.0.19
> > >
> > > The original driver in mainline had issues and would not allow for the
> > > RK3399 to operate in PCIe endpoint mode. This patch series fixes that so
> > > that the PCIe core controller of the RK3399 SoC can now act as a PCIe
> > > endpoint.
> >
> > So we merged cf590b078391 ("PCI: rockchip: Add EP driver for Rockchip
> > PCIe controller") when it actually didn't work?  Ouch.  Thanks for
> > fixing it and testing it.
> 
> It seems it wasn't fully tested, the code compiles and kernel module loads,
> but further functionality didn't seem to have been tested
> (e.g., lspci, and with the pcitest tool and pci_endpoit_test_driver).

OK, I guess that happens sometimes.  Glad you're getting it into
shape!

> Does this mean I should refer to the commit cf590b078391
> ("PCI: rockchip: Add EP driver for Rockchip PCIe controller") ?
> Because it wasn't working in the first place ?

Yes, I think so.

> Thank you for all the pointers, I'll take them into account for the
> next iteration. This is the first time I actually submitted a series of
> patches to the LKML so it's all relatively new to me.

Welcome to Linux, and great start!

Bjorn