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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,T_DKIMWL_WL_HIGH,UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8F9C6C282DD for ; Mon, 10 Jun 2019 13:00:57 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 651D920859 for ; Mon, 10 Jun 2019 13:00:57 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="i66b68mE" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 651D920859 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=WqFRFXuWXNv/8lo/W5fFzviP/3DC/aLNBM9fZt1pYXg=; b=i66b68mEQgeHOt tFXSaP5rKgvI3M86vmnAmiqZkriIH1wm7onl/Wk0TOQtFZGNDveM0mvjPF3Yhxn08VTr/PFVZSQ0z dCKsx7XfnnWLa2AJMCBSh5TQSoCbfaBQiLwe+KnSk3ITrRYhHT6TCqnWTNY9UPUmVhhcnuB2VwumS K6D9ZTzgAWQnvEZauwnjd28yqVDVpaUre26jOvk1kldc3jLUp+P8GVzVQ4HnpdK76jlx8RjfCAtFX QcBhh1w/BJWDPtYPQuqhXsSx3tDQJh3sadAepvqN6IzfR9xjbkfpRkpkTf+rF2vJZQvMOWiZAOlkJ oSRPr8CfxrGb/9ACs9yA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92 #3 (Red Hat Linux)) id 1haJuu-000077-Td; Mon, 10 Jun 2019 13:00:52 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.92 #3 (Red Hat Linux)) id 1haJt7-0005ZC-44; Mon, 10 Jun 2019 12:59:03 +0000 X-UUID: 77c92c617dec4a9282c840c5b83ace70-20190610 X-UUID: 77c92c617dec4a9282c840c5b83ace70-20190610 Received: from mtkcas66.mediatek.inc [(172.29.193.44)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLS) with ESMTP id 895842316; Mon, 10 Jun 2019 04:56:09 -0800 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62N2.mediatek.inc (172.29.193.42) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 10 Jun 2019 05:56:08 -0700 Received: from mtkcas07.mediatek.inc (172.21.101.84) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1395.4; Mon, 10 Jun 2019 20:56:06 +0800 Received: from localhost.localdomain (10.17.3.153) by mtkcas07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1395.4 via Frontend Transport; Mon, 10 Jun 2019 20:56:05 +0800 From: Yong Wu To: Matthias Brugger , Joerg Roedel , Rob Herring Subject: [PATCH v2 03/12] iommu/mediatek: Add device_link between the consumer and the larb devices Date: Mon, 10 Jun 2019 20:55:04 +0800 Message-ID: <1560171313-28299-4-git-send-email-yong.wu@mediatek.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1560171313-28299-1-git-send-email-yong.wu@mediatek.com> References: <1560171313-28299-1-git-send-email-yong.wu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190610_055901_239224_EE9EC847 X-CRM114-Status: GOOD ( 14.86 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , srv_heupstream@mediatek.com, Will Deacon , linux-kernel@vger.kernel.org, Evan Green , Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, yong.wu@mediatek.com, yingjoe.chen@mediatek.com, anan.sun@mediatek.com, Robin Murphy , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org MediaTek IOMMU don't have its power-domain. all the consumer connect with smi-larb, then connect with smi-common. M4U | smi-common | ------------- | | ... | | larb1 larb2 | | vdec venc When the consumer works, it should enable the smi-larb's power which also need enable the smi-common's power firstly. Thus, First of all, use the device link connect the consumer and the smi-larbs. then add device link between the smi-larb and smi-common. This patch adds device_link between the consumer and the larbs. Suggested-by: Tomasz Figa Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 12 ++++++++++++ drivers/iommu/mtk_iommu_v1.c | 13 ++++++++++++- 2 files changed, 24 insertions(+), 1 deletion(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index f7599d8..7b70574 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -440,6 +440,9 @@ static int mtk_iommu_add_device(struct device *dev) struct iommu_fwspec *fwspec = dev_iommu_fwspec_get(dev); struct mtk_iommu_data *data; struct iommu_group *group; + struct device_link *link; + struct device *larbdev; + unsigned int larbid; if (!fwspec || fwspec->ops != &mtk_iommu_ops) return -ENODEV; /* Not a iommu client device */ @@ -451,6 +454,15 @@ static int mtk_iommu_add_device(struct device *dev) if (IS_ERR(group)) return PTR_ERR(group); + /* Link the consumer device with the smi-larb device(supplier) */ + larbid = MTK_M4U_TO_LARB(fwspec->ids[0]); + larbdev = data->smi_imu.larb_imu[larbid].dev; + link = device_link_add(dev, larbdev, + DL_FLAG_PM_RUNTIME | + DL_FLAG_AUTOREMOVE_CONSUMER); + if (!link) + dev_err(dev, "Unable to link %s\n", dev_name(larbdev)); + iommu_group_put(group); return 0; } diff --git a/drivers/iommu/mtk_iommu_v1.c b/drivers/iommu/mtk_iommu_v1.c index c43c4a0..845e20b 100644 --- a/drivers/iommu/mtk_iommu_v1.c +++ b/drivers/iommu/mtk_iommu_v1.c @@ -423,7 +423,9 @@ static int mtk_iommu_add_device(struct device *dev) struct of_phandle_iterator it; struct mtk_iommu_data *data; struct iommu_group *group; - int err; + struct device_link *link; + struct device *larbdev; + int err, larbid; of_for_each_phandle(&it, err, dev->of_node, "iommus", "#iommu-cells", 0) { @@ -466,6 +468,15 @@ static int mtk_iommu_add_device(struct device *dev) return err; } + /* Link the consumer device with the smi-larb device(supplier) */ + larbid = mt2701_m4u_to_larb(fwspec->ids[0]); + larbdev = data->smi_imu.larb_imu[larbid].dev; + link = device_link_add(dev, larbdev, + DL_FLAG_PM_RUNTIME | + DL_FLAG_AUTOREMOVE_CONSUMER); + if (!link) + dev_err(dev, "Unable to link %s\n", dev_name(larbdev)); + return iommu_device_link(&data->iommu, dev); } -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel