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(unknown []) by gzga-smtp-mtada-g0-4 (Coremail) with SMTP id _____wAXH5wkXftpfKPsDg--.7909S2; Wed, 06 May 2026 23:24:21 +0800 (CST) From: Hans Zhang <18255117159@163.com> To: bhelgaas@google.com, lpieralisi@kernel.org, kwilczynski@kernel.org, mani@kernel.org, vigneshr@ti.com, jingoohan1@gmail.com, thomas.petazzoni@bootlin.com, pali@kernel.org, ryder.lee@mediatek.com, jianjun.wang@mediatek.com, claudiu.beznea.uj@bp.renesas.com, mpillai@cadence.com Cc: robh@kernel.org, s-vadapalli@ti.com, linux-omap@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, linux-renesas-soc@vger.kernel.org, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, Hans Zhang <18255117159@163.com> Subject: [PATCH v2 8/8] PCI: rzg3s-host: Add 100 ms delay after link training Date: Wed, 6 May 2026 23:23:46 +0800 Message-Id: <20260506152346.166056-9-18255117159@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260506152346.166056-1-18255117159@163.com> References: <20260506152346.166056-1-18255117159@163.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: _____wAXH5wkXftpfKPsDg--.7909S2 X-Coremail-Antispam: 1Uf129KBjvdXoWrtr1DXw47ZryDZFy8XryfCrg_yoWkurg_u3 9xCFn7Aw4UGr9akF12y34rZryYy342qr10qa10vF13ta4I9r1rXw1fZF4jy3WUWa15JFyv yryqyr109r9rujkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRM7KItUUUUU== X-Originating-IP: [240e:b8f:927e:5900:dbee:26f0:1b68:48a4] X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/xtbCxAW5XWn7XSU5xwAA3x X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260506_082459_409436_ED0E001D X-CRM114-Status: GOOD ( 10.68 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org The Renesas RZ/G3S PCIe host driver currently does not enforce the mandatory 100 ms delay after link training completes for speeds > 5.0 GT/s, required by PCIe r6.0 sec 6.6.1. The driver already has a 'max_link_speed' field (derived from the device tree). Add a call to pcie_wait_after_link_train() in rzg3s_pcie_host_init() after reading the link status, ensuring that the delay is applied before any Configuration Request is sent downstream. Signed-off-by: Hans Zhang <18255117159@163.com> --- drivers/pci/controller/pcie-rzg3s-host.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/controller/pcie-rzg3s-host.c b/drivers/pci/controller/pcie-rzg3s-host.c index d86e7516dcc2..6ab59c5464cf 100644 --- a/drivers/pci/controller/pcie-rzg3s-host.c +++ b/drivers/pci/controller/pcie-rzg3s-host.c @@ -1390,6 +1390,8 @@ static int rzg3s_pcie_host_init(struct rzg3s_pcie_host *host) val = readl_relaxed(host->axi + RZG3S_PCI_PCSTAT2); dev_info(host->dev, "PCIe link status [0x%x]\n", val); + pcie_wait_after_link_train(host->max_link_speed); + return 0; config_deinit_post: -- 2.34.1