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 85222CD37AC for ; Mon, 11 May 2026 06:00:33 +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=hv/1t/xGsQygAr/vopI1Yy4bj8nhzgu3manFIYqiKFY=; b=uMB3hunwyKKbH/iWu0YGAvKxrb 9H/W28AZyiFwLlEwxhTXH+wj2bojY0c4wxE3WMpxYrnWR5RWRGVmAsY04P7BLZtM4liNANAtaDW91 0iZztDhXMBKsbDdnFHpo74qtH/PQdGCyAtZfTQ138HBTBguFjd7UheHwqM2zDnvqadEpxVh2y2V56 vElFNbgF6L/wyZ9OgOgBHR61TntgtTLBRr7G4uYbH9g2+LY3A9a3Lb50lBQVzG5AN9EOrnuONgQ3E 4n6dS4yRuQ4Awa/Pm6xOiXnAEpgr6//Xxp/XR+LEM7PkaCQLn9PSEoR0TxlXHVyhCE+pG7bl8ZWrc nqhkqf4A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wMJgf-0000000CQbG-1km4; Mon, 11 May 2026 06:00:17 +0000 Received: from m16.mail.163.com ([117.135.210.2]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wMJgc-0000000CQZX-1fsI; Mon, 11 May 2026 06:00:16 +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=hv /1t/xGsQygAr/vopI1Yy4bj8nhzgu3manFIYqiKFY=; b=He7KE0CXg8bR10NsVH pcJV9X76hZYnFm/9lfgZrZ5UIaZhx2VpNgb/D3HxSRwOzoTvHiEFOSQ5/Uliw50z /JGdpUgP+ryZyY+LkzknGzUbyh+tQZFM+1QFuLCHO2l5b3ZvqF8pORJ7yZBwBF2k I0QId1gYDu34JLI+Wl1JfrA2E= Received: from Precision-7960.. (unknown []) by gzga-smtp-mtada-g1-4 (Coremail) with SMTP id _____wDn9yk8cAFqPHQVAw--.46705S8; Mon, 11 May 2026 13:59:33 +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, 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, claudiu.beznea@tuxon.dev, 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 v3 6/7] PCI: mediatek-gen3: Add 100 ms delay after link up Date: Mon, 11 May 2026 13:59:22 +0800 Message-Id: <20260511055923.37117-7-18255117159@163.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260511055923.37117-1-18255117159@163.com> References: <20260511055923.37117-1-18255117159@163.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CM-TRANSID: _____wDn9yk8cAFqPHQVAw--.46705S8 X-Coremail-Antispam: 1Uf129KBjvdXoW7Jr4kWw4fAw18WF4rJF1kZrb_yoWkKrcE9a yxZFWfZayjkrySkFnayFyrZr9Yy3s7Wr10qF4fKF13Aa48urn0qrZavryDAF4kGw43tF12 yryqk3W8WFykCjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7xRAJ5r3UUUUU== X-Originating-IP: [140.206.53.66] X-CM-SenderInfo: rpryjkyvrrlimvzbiqqrwthudrp/xtbC6wUIq2oBcEXJTQAA3X X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260510_230014_885678_B85551BA X-CRM114-Status: UNSURE ( 9.35 ) 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 pci_host_common_link_train_delay() to comply with the specification. Signed-off-by: Hans Zhang <18255117159@163.com> --- drivers/pci/controller/pcie-mediatek-gen3.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/pci/controller/pcie-mediatek-gen3.c b/drivers/pci/controller/pcie-mediatek-gen3.c index b0accd828589..5abddec4e9be 100644 --- a/drivers/pci/controller/pcie-mediatek-gen3.c +++ b/drivers/pci/controller/pcie-mediatek-gen3.c @@ -30,6 +30,7 @@ #include #include +#include "pci-host-common.h" #include "../pci.h" #define PCIE_BASE_CFG_REG 0x14 @@ -570,6 +571,8 @@ static int mtk_pcie_startup_port(struct mtk_gen3_pcie *pcie) goto err_power_down_device; } + pci_host_common_link_train_delay(pcie->max_link_speed); + return 0; err_power_down_device: -- 2.34.1