From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 77B40C433F5 for ; Sun, 29 May 2022 15:57:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:Content-Type: Content-Transfer-Encoding:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:From:References:Cc:To:Subject: MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=AnG55O+2DBTQzBTM4A8gHV19nMrBf1PyDhI0YpR/RVk=; b=yn6QM5dyJXql+y OAM15k3Xx2TwaAvMgHxW+TeM+7sq7ILc6slm9EaEQez7ohbuvIU2udTDVeIcn+lR8+HZeJe4GRwHW gewiRIPZaQsJueVWCcpDUgXK/myLT5BrfqDati5HG15WCba/JAtAZmC7tdsE5Wjs6omWg7f3dp2DB suqLIk0W3NfwklP3Fbp49Zy+bhaDzM2zBj8V9lyBs7/8W2rG8jqIEbNlXJrU+l0KqMupixu+fdnOJ DYI3Y+jxAAjBFDfivaBVFFs5rNwPLAi5pscMjTIyCR6LvX6B/Cn+EDoPbL3uefZWYmCR1xx/rP4s+ O/AA1EFFnsQUwgf2A2Vg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1nvLHh-004DWF-9u; Sun, 29 May 2022 15:56:53 +0000 Received: from imap3.hz.codethink.co.uk ([176.9.8.87]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1nvLHe-004DUy-Ke for linux-riscv@lists.infradead.org; Sun, 29 May 2022 15:56:52 +0000 Received: from cpc152649-stkp13-2-0-cust121.10-2.cable.virginm.net ([86.15.83.122] helo=[192.168.0.17]) by imap3.hz.codethink.co.uk with esmtpsa (Exim 4.92 #3 (Debian)) id 1nvLHZ-0005f7-KS; Sun, 29 May 2022 16:56:45 +0100 Message-ID: Date: Sun, 29 May 2022 16:56:44 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.9.0 Subject: Re: [V3] PCI: fu740: Drop to 2.5GT/s to fix initial device probing on some boards Content-Language: en-GB To: "Maciej W. Rozycki" Cc: Alexandre Ghiti , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, Bjorn Helgaas , Palmer Dabbelt , Rob Herring , Lorenzo Pieralisi , Greentime Hu , Paul Walmsley , David Abdurachmanov , Neill Whillans References: <20220318152430.526320-1-ben.dooks@codethink.co.uk> <2442936e-a53e-59bf-488f-95eac26d1252@ghiti.fr> <85e864fd-762e-0780-f829-bfbb178ab24e@ghiti.fr> <3acd20b2-5882-7cc0-8a7b-7b406b768c1c@codethink.co.uk> From: Ben Dooks Organization: Codethink Limited. In-Reply-To: X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220529_085650_723363_3F2C861F X-CRM114-Status: GOOD ( 13.24 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org On 02/05/2022 12:46, Maciej W. Rozycki wrote: > 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? > I can't see anything obvious from the code, however my SD card image does not have lspci on it and I have not had time to make a new image to test. I wonder if anyone at SiFive can comment on this? -- Ben Dooks http://www.codethink.co.uk/ Senior Engineer Codethink - Providing Genius https://www.codethink.co.uk/privacy.html _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv