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[209.17.68.221]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-2f7085261dcsm1908286a91.0.2025.01.15.03.14.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 15 Jan 2025 03:14:40 -0800 (PST) Date: Wed, 15 Jan 2025 20:14:38 +0900 From: Krzysztof =?utf-8?Q?Wilczy=C5=84ski?= To: Lorenzo Bianconi Cc: Ryder Lee , Jianjun Wang , Lorenzo Pieralisi , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Matthias Brugger , AngeloGioacchino Del Regno , linux-pci@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-kernel@lists.infradead.org, Hui Ma Subject: Re: [PATCH v4] PCI: mediatek-gen3: Avoid PCIe resetting via PERST# for Airoha EN7581 SoC Message-ID: <20250115111438.GB4176564@rocinante> References: <20250109-pcie-en7581-rst-fix-v4-1-4a45c89fb143@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250109-pcie-en7581-rst-fix-v4-1-4a45c89fb143@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250115_031441_872757_BD5F4A27 X-CRM114-Status: UNSURE ( 9.03 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hello, > Airoha EN7581 has a hw bug asserting/releasing PERST# signal causing > occasional PCIe link down issues. In order to overcome the problem, > PERST# signal is not asserted/released during device probe or > suspend/resume phase and the PCIe block is reset using > en7523_reset_assert() and en7581_pci_enable(). > > Introduce flags field in the mtk_gen3_pcie_pdata struct in order to > specify per-SoC capabilities. Applied to controller/mediatek for v6.14, thank you! Krzysztof