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[2620:137:e000::1:18]) by mx.google.com with ESMTPS id h8-20020a056a00218800b005060c118977si2783023pfi.119.2022.05.18.03.04.26 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 May 2022 03:04:27 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) client-ip=2620:137:e000::1:18; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:18 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=nxp.com Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B60ED6832E; Wed, 18 May 2022 02:48:28 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234612AbiERJsN (ORCPT + 99 others); Wed, 18 May 2022 05:48:13 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42890 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233911AbiERJsF (ORCPT ); Wed, 18 May 2022 05:48:05 -0400 Received: from inva020.nxp.com (inva020.nxp.com [92.121.34.13]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 300C920BD7; Wed, 18 May 2022 02:48:00 -0700 (PDT) Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id C348A1A0D8B; Wed, 18 May 2022 11:47:58 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 7D2DA1A0D87; Wed, 18 May 2022 11:47:58 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id D76A5180031E; Wed, 18 May 2022 17:47:56 +0800 (+08) From: Richard Zhu To: l.stach@pengutronix.de, bhelgaas@google.com, lorenzo.pieralisi@arm.com, festevam@gmail.com Cc: hongxing.zhu@nxp.com, linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, kernel@pengutronix.de, linux-imx@nxp.com Subject: [RFC 2/2] PCI: imx6: Support more than Gen2 speed link mode Date: Wed, 18 May 2022 17:35:28 +0800 Message-Id: <1652866528-13220-2-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1652866528-13220-1-git-send-email-hongxing.zhu@nxp.com> References: <1652866528-13220-1-git-send-email-hongxing.zhu@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,RDNS_NONE, SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Support more than Gen2 speed link mode, since i.MX8MP PCIe supports up to Gen3 link speed. Signed-off-by: Richard Zhu --- drivers/pci/controller/dwc/pci-imx6.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c index 30641d2dda14..37012f9a33a0 100644 --- a/drivers/pci/controller/dwc/pci-imx6.c +++ b/drivers/pci/controller/dwc/pci-imx6.c @@ -809,8 +809,8 @@ static int imx6_pcie_start_link(struct dw_pcie *pci) dw_pcie_wait_for_link(pci); - if (pci->link_gen == 2) { - /* Allow Gen2 mode after the link is up. */ + if (pci->link_gen > 1) { + /* Allow faster modes after the link is up. */ dw_pcie_dbi_ro_wr_en(pci); tmp = dw_pcie_readl_dbi(pci, offset + PCI_EXP_LNKCAP); tmp &= ~PCI_EXP_LNKCAP_SLS; -- 2.25.1