From patchwork Tue Jun 14 06:58:54 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hongxing Zhu X-Patchwork-Id: 12880545 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 77979C43334 for ; Tue, 14 Jun 2022 07:14:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=+L9FN7WINrcNnMcWQ4rYyTs27HAvucNWcPWhn5jFcFQ=; b=uhPVsCK/rMUITw zNn029OBEnPn8ilkA+6fx3Jkum1oGzQ0LB7IG3aYh6tTripwel09pQT0E4vsr2x1HJYDEy1t5oENp 3ojRqa9OI5Cw+RXWroMYAzwyD9eHz1fmfZQmWcWV1FfdsM0Vc8SR4ZIbEcFe0k80KybzvoHWkNqV2 VGLEPr0RCbtPJndbOui7cRxtjNJXFe/JdZU+VDOxqbSDqxuvbktf71hUOCDXLHnjFV1a+5wqwK+4h p3OjnFxuQMhg3GUfBdbKko7x0f9f6kC0Tm3mydsL5o5Srd5CB0+izlNjOj+Gy9z6KXVePSGxpwZUS 8BQzk7r/R4oRzqnEx8CQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1o10jU-007WDq-Mq; Tue, 14 Jun 2022 07:13:00 +0000 Received: from inva021.nxp.com ([92.121.34.21]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1o10jP-007W2J-53 for linux-arm-kernel@lists.infradead.org; Tue, 14 Jun 2022 07:12:57 +0000 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 691FA20004F; Tue, 14 Jun 2022 09:12:51 +0200 (CEST) Received: from aprdc01srsp001v.ap-rdc01.nxp.com (aprdc01srsp001v.ap-rdc01.nxp.com [165.114.16.16]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 06DAE2000C2; Tue, 14 Jun 2022 09:12:51 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by aprdc01srsp001v.ap-rdc01.nxp.com (Postfix) with ESMTP id 67BCC1802205; Tue, 14 Jun 2022 15:12:49 +0800 (+08) From: Richard Zhu To: l.stach@pengutronix.de, bhelgaas@google.com, robh+dt@kernel.org, broonie@kernel.org, lorenzo.pieralisi@arm.com, festevam@gmail.com, francesco.dolcini@toradex.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: [PATCH v11 0/8] PCI: imx6: refine codes and add the error propagation Date: Tue, 14 Jun 2022 14:58:54 +0800 Message-Id: <1655189942-12678-1-git-send-email-hongxing.zhu@nxp.com> X-Mailer: git-send-email 2.7.4 X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220614_001255_514194_89E5C7DF X-CRM114-Status: GOOD ( 19.30 ) 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: , MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This series patches refine pci-imx6 driver and do the following main changes. - Encapsulate the clock enable into one standalone function - Add the error propagation from host_init and resume - Turn off regulator when the system is in suspend mode - Let the probe successfully when link never comes up - Do not hide the phy driver callbacks in core reset and clk_enable. BTW, this series are verified on i.MX8MM EVK board when one NVME is used. Main changes from v10 to v11: No code changes, just do the following operations refer to Bjorn's comments. - Split #6 patch into two patches. - Rebase to v5.19-rc1 based on for-next branch of Shawn's git. Main changes from v9 to v10: - Add the "Reviewed-by: Lucas Stach " tag into #3 and #4 patches. - Refer to Bjorn's comments: - refine the commit of the first patch - keep alignment of the message format in the second patch - More specific commit and subject of the #5 and #7 patches. - Move the regualtor_disable into suspend, turn off the regulator when bus is powered off and system in suspend mode. - Let the driver probe successfully, return zero in imx6_pcie_start_link() when PCIe link is down. In this link down scenario, only start the PCIe link training in resume when the link is up before system suspend to avoid the long latency in the link training period. - Don't hide phy driver callbacks in core reset and clk_enable, and refine the error handling accordingly. - Drop the #8 patch of v9 series, since the clocks and powers are not gated off anymore when link is down. Main changes from v8 to v9: - Don't change pcie-designware codes, and do the error exit process only in pci-imx6 driver internally. - Move the phy driver callbacks to the proper places Main changes from v7 to v8: Regarding Bjorn's review comments. - Align the format of the dev_info message and refine commit log of #6/7/8 patches. - Rename the err_reset_phy label, since there is no PHY reset in the out Main changes from v6 to v7: - Keep the regulator usage counter balance in the #5 patch of v6 series. Main changes from v5 to v6: - Refer to the following discussion with Fabio, fix the dump by his patch. https://patchwork.kernel.org/project/linux-pci/patch/1641368602-20401-6-git-send-email-hongxing.zhu@nxp.com/ Refine and rebase this patch-set after Fabio' dump fix patch is merged. - Add one new #4 patch to disable i.MX6QDL REF clock too when disable clocks - Split the regulator refine codes into one standalone patch #5 in this version. Main changes from v4 to v5: - Since i.MX8MM PCIe support had been merged. Based on Lorenzo's git repos, resend the patch-set after rebase. Main changes from v3 to v4: - Regarding Mark's comments, delete the regulator_is_enabled() check. - Squash #3 and #6 of v3 patch into #5 patch of v4 set. Main changes from v2 to v3: - Add "Reviewed-by: Lucas Stach " tag into first two patches. - Add a Fixes tag into #3 patch. - Split the #4 of v2 to two patches, one is clock disable codes move, the other one is the acutal clock unbalance fix. - Add a new host_exit() callback into dw_pcie_host_ops, then it could be invoked to handle the unbalance issue in the error handling after host_init() function when link is down. - Add a new host_exit() callback for i.MX PCIe driver to handle this case in the error handling after host_init. Main changes from v1 to v2: Regarding Lucas' comments. - Move the placement of the new imx6_pcie_clk_enable() to avoid the forward declarition. - Seperate the second patch of v1 patch-set to three patches. - Use the module_param to replace the kernel command line. Regarding Bjorn's comments: - Use the cover-letter for a multi-patch series. - Correct the subject line, and refine the commit logs. For example, remove the timestamp of the logs. drivers/pci/controller/dwc/pci-imx6.c | 241 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++------------------------------------- 1 file changed, 157 insertions(+), 84 deletions(-) [PATCH v11 1/8] PCI: imx6: Encapsulate the clock enable into one [PATCH v11 2/8] PCI: imx6: Add the error propagation from host_init [PATCH v11 3/8] PCI: imx6: Move imx6_pcie_clk_disable() earlier [PATCH v11 4/8] PCI: imx6: Disable iMX6QDL PCIe REF clock when [PATCH v11 5/8] PCI: imx6: Turn off regulator when the system is in [PATCH v11 6/8] PCI: imx6: Mark the link down as none fatal error [PATCH v11 7/8] PCI: imx6: Reduce resume time by only starting link [PATCH v11 8/8] PCI: imx6: Do not hide phy driver callbacks and