Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19;
Date:   Mon, 2 May 2022 12:46:11 +0100 (BST)
From:   "Maciej W. Rozycki" <macro@orcam.me.uk>
To:     Ben Dooks <ben.dooks@codethink.co.uk>
cc:     Alexandre Ghiti <alex@ghiti.fr>, linux-pci@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
        Bjorn Helgaas <bhelgaas@google.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Rob Herring <robh@kernel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
        Greentime Hu <greentime.hu@sifive.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        David Abdurachmanov <david.abdurachmanov@sifive.com>,
        Neill Whillans <neill.whillans@codethink.co.uk>
Subject: Re: [V3] PCI: fu740: Drop to 2.5GT/s to fix initial device probing
 on some boards
In-Reply-To: <3acd20b2-5882-7cc0-8a7b-7b406b768c1c@codethink.co.uk>
Message-ID: <alpine.DEB.2.21.2205020049130.9383@angie.orcam.me.uk>
References: <20220318152430.526320-1-ben.dooks@codethink.co.uk> <2442936e-a53e-59bf-488f-95eac26d1252@ghiti.fr> <85e864fd-762e-0780-f829-bfbb178ab24e@ghiti.fr> <bded4b1e-3404-6bcd-3289-dc8d5b4d713a@codethink.co.uk> <alpine.DEB.2.21.2204140048460.9383@angie.orcam.me.uk>
 <3acd20b2-5882-7cc0-8a7b-7b406b768c1c@codethink.co.uk>
User-Agent: Alpine 2.21 (DEB 202 2017-01-01)
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk

Hi Ben,

> >   Any idea what might be causing it?  I can't see it being explicitly set
> > or cleared anywhere, be it in U-Boot or Linux, so it must be done by the
> > device itself depending on something.  And the lack of this capability
> > seems to me like non-compliance for a multiple-lane, multiple-speed
> > device.
> 
> I'll see if we can reproduce this

 Have you been able to look into it?

  Maciej