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 4D30BCD342C for ; Wed, 6 May 2026 15:25:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=sris0xyiMLfYPD6D/YefkQkhGzEH93jUaJ4nBZ/Loa0=; b=yy7BIgZP4BhP5pJeQncwVW1QEw ZO7AMv3l5IYaTBd27JGt0bY4dRUSyyE92lERfz3IRezz3iWfPeiy27U631E73upBkL8sDbYHjiDGH MtOsaeXAj2WF1+lqxOx/K4mvPDyLFAJBmg0tAvsNMVWLIz2fPJ5OheeyQTT2eGPdpYIF4RXA09miP Z11OMCM5kAuHlDtXikv6JhGdBMaFEjo1VB1KMvWt+Hq02WE5+qhfKOKuSkG8uczupHmb3N7zdRD13 rtdMjfCXHulKS/fU7aV47D+D7J4Vsmlt0zE37/xCPxPg2N1mu3JVS83t/mg1i+TBPRda2XKE1Hp14 oIQJGbGA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wKe7O-00000001J69-3oOi; Wed, 06 May 2026 15:24:58 +0000 Received: from m16.mail.163.com ([117.135.210.4]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wKe7M-00000001Ixp-2xlR; Wed, 06 May 2026 15:24:58 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=From:To:Subject:Date:Message-Id:MIME-Version; bh=sr is0xyiMLfYPD6D/YefkQkhGzEH93jUaJ4nBZ/Loa0=; b=hDDHTfQzz2ffofBWZ6 MMO1lj9A9H/9vDW4NbQFBR/f8Xw7UUFwfkt8GvaLmvh5Hx8u21aeOzXk27XcU+rD huHoO115HRJ9ERdNVq5Db1hOUD9Io3ook8IBV7imAu6TVHzcEbjgNG7e7A/iz6/+ 3fabcJ6BJK/JGoeQ6yLk2bLk0= Received: from zhb.. (unknown []) by gzga-smtp-mtada-g0-0 (Coremail) with SMTP id _____wCHAqsXXftpv5CgDg--.43926S9; Wed, 06 May 2026 23:24:17 +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 7/8] PCI: mediatek-gen3: Add 100 ms delay after link training Date: Wed, 6 May 2026 23:23:45 +0800 Message-Id: <20260506152346.166056-8-18255117159@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: _____wCHAqsXXftpv5CgDg--.43926S9 X-Coremail-Antispam: 1Uf129KBjvdXoW7Jr4kWw4fAw18WF4rJF1kZrb_yoWDArXE9a y8JrWfZay5Cry5CFnayFyrZr9aya47Wr18XayrKFnxZa48ur9Yqr9IvryDXFs5Gw4aqF17 tryqyF18uFyDAjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRufOztUUUUU== X-Originating-IP: [240e:b8f:927e:5900:dbee:26f0:1b68:48a4] X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/xtbC7AG4XGn7XSHiCgAA3P X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260506_082458_487885_176FDEDE X-CRM114-Status: UNSURE ( 9.18 ) 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 The MediaTek Gen3 PCIe host driver lacks the required 100 ms delay after link training completes for speeds > 5.0 GT/s, as specified in PCIe r6.0 sec 6.6.1. The driver already stores max_link_speed (from the device tree). After mtk_pcie_startup_port() successfully brings up the link, call pcie_wait_after_link_train() to comply with the specification. Signed-off-by: Hans Zhang <18255117159@163.com> --- drivers/pci/controller/pcie-mediatek-gen3.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index b0accd828589..7c5f2ba7157b 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -570,6 +570,8 @@ static int mtk_pcie_startup_port(struct mtk_gen3_pcie *pcie) goto err_power_down_device; } + pcie_wait_after_link_train(pcie->max_link_speed); + return 0; err_power_down_device: -- 2.34.1