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Fri, 28 Aug 2020 06:56:15 -0500 Received: from DLEE104.ent.ti.com (157.170.170.34) by DLEE103.ent.ti.com (157.170.170.33) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3; Fri, 28 Aug 2020 06:56:15 -0500 Received: from fllv0040.itg.ti.com (10.64.41.20) by DLEE104.ent.ti.com (157.170.170.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256_P256) id 15.1.1979.3 via Frontend Transport; Fri, 28 Aug 2020 06:56:15 -0500 Received: from [10.24.69.198] (ileax41-snat.itg.ti.com [10.172.224.153]) by fllv0040.itg.ti.com (8.15.2/8.15.2) with ESMTP id 07SBuDG3031339; Fri, 28 Aug 2020 06:56:13 -0500 Subject: Re: [PATCH] arm64: dts: ti: k3-am65: restrict PCIe to Gen2 speed To: Nishanth Menon References: <20200802165356.10285-1-nsekhar@ti.com> <20200828002426.e7surnodpblgln7h@akan> <20200828113214.2j7uph4pc3e6isqp@akan> From: Sekhar Nori Message-ID: <8c0cc440-4989-413d-e3c8-257d784ec78f@ti.com> Date: Fri, 28 Aug 2020 17:26:12 +0530 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.0 MIME-Version: 1.0 In-Reply-To: <20200828113214.2j7uph4pc3e6isqp@akan> Content-Language: en-US X-EXCLAIMER-MD-CONFIG: e1e8a2fd-e40a-4ac6-ac9b-f7e9cc9ee180 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200828_075617_993267_B57A112B X-CRM114-Status: GOOD ( 17.19 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Tero Kristo , Linux ARM Mailing List , Kishon Vijay Abraham I Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 28/08/20 5:02 PM, Nishanth Menon wrote: > On 08:34-20200828, Sekhar Nori wrote: >> On 28/08/20 5:54 AM, Nishanth Menon wrote: >>> On 10:13-20200827, Sekhar Nori wrote: >>>> Hi Nishanth, >>>> >>>> On 02/08/20 10:23 PM, Sekhar Nori wrote: >>>>> Per errata i2104 documented in AM65x device errata document (TI document >>>>> number SPRZ452E, revised June 2019), Gen3 operation is not supported for >>>>> both PCIe Root Complex and Endpoint modes of operation. >>>>> >>>>> See: https://www.ti.com/lit/er/sprz452e/sprz452e.pdf >>>>> >>>>> Restrict speed to Gen2 to address the errata. >>>>> >>>>> Signed-off-by: Sekhar Nori >>>> >>>> Is this in your queue or should I rebase and resend? >>> >>> Thanks for the reminder. I have put it on my staging branch for now. >>> Once rc3 gets tagged with irqchip related changes, I will move this over >>> to next. >> >> Hmm, this is errata fix and fair game for -rc cycle. Can we have this in >> v5.9 itself? > > We could, but does'nt seem urgent enough for 5.9 cycle since the dts node > was'nt introduced in this cycle, I think it was introduced around 5.3 or > so? Isn't this too early in -rc cycle to be regressions only? I can provide a fixes tag if you want to ensure backporting. I felt odd about it because its workaround for hardware issue, nothing wrong in the original commit when it was written. But if you are uncomfortable, fine :) Thanks, Sekhar _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel