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Wed, 28 Jun 2023 02:19:37 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 35S2JYB7023380; Wed, 28 Jun 2023 02:19:34 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3rdsjkqpkj-1; Wed, 28 Jun 2023 02:19:34 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 35S2JYBG023364; Wed, 28 Jun 2023 02:19:34 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.112]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 35S2JXrL023362; Wed, 28 Jun 2023 02:19:34 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 65D484AAD; Wed, 28 Jun 2023 07:49:33 +0530 (+0530) From: Krishna chaitanya chundru To: manivannan.sadhasivam@linaro.org Cc: helgaas@kernel.org, linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, quic_vbadigan@quicinc.com, quic_nitegupt@quicinc.com, quic_skananth@quicinc.com, quic_ramkri@quicinc.com, krzysztof.kozlowski@linaro.org, Krishna chaitanya chundru , Manivannan Sadhasivam , Andy Gross , Bjorn Andersson , Konrad Dybcio , Bjorn Helgaas , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Krzysztof Kozlowski , Conor Dooley , devicetree@vger.kernel.org (open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS) Subject: [PATCH v6 1/3] dt-bindings: PCI: qcom: ep: Add interconnects path Date: Wed, 28 Jun 2023 07:49:28 +0530 Message-Id: <1687918770-28416-2-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1687918770-28416-1-git-send-email-quic_krichai@quicinc.com> References: <1687918770-28416-1-git-send-email-quic_krichai@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: e_IT5626rkkaFORRJGS3co2qZEJ95YBn X-Proofpoint-GUID: e_IT5626rkkaFORRJGS3co2qZEJ95YBn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-27_16,2023-06-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 spamscore=0 impostorscore=0 suspectscore=0 mlxscore=0 mlxlogscore=999 phishscore=0 clxscore=1015 bulkscore=0 lowpriorityscore=0 adultscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306280019 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED 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 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1769911380138682893?= X-GMAIL-MSGID: =?utf-8?q?1769911380138682893?= Some platforms may not boot if a device driver doesn't initialize the interconnect path. Mostly it is handled by the bootloader but we have starting to see cases where bootloader simply ignores them. Add the "pcie-mem" interconnect path as a required property to the bindings. Signed-off-by: Krishna chaitanya chundru Acked-by: Manivannan Sadhasivam Reviewed-by: Krzysztof Kozlowski --- Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml index 8111122..bc32e13 100644 --- a/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml +++ b/Documentation/devicetree/bindings/pci/qcom,pcie-ep.yaml @@ -71,6 +71,13 @@ properties: description: GPIO used as WAKE# output signal maxItems: 1 + interconnects: + maxItems: 1 + + interconnect-names: + items: + - const: pcie-mem + resets: maxItems: 1 @@ -98,6 +105,8 @@ required: - interrupts - interrupt-names - reset-gpios + - interconnects + - interconnect-names - resets - reset-names - power-domains @@ -167,7 +176,9 @@ examples: - | #include #include + #include #include + pcie_ep: pcie-ep@1c00000 { compatible = "qcom,sdx55-pcie-ep"; reg = <0x01c00000 0x3000>, @@ -194,6 +205,8 @@ examples: interrupts = , ; interrupt-names = "global", "doorbell"; + interconnects = <&system_noc MASTER_PCIE &mc_virt SLAVE_EBI_CH0>; + interconnect-names = "pcie-mem"; reset-gpios = <&tlmm 57 GPIO_ACTIVE_LOW>; wake-gpios = <&tlmm 53 GPIO_ACTIVE_LOW>; resets = <&gcc GCC_PCIE_BCR>; From patchwork Wed Jun 28 02:19:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna chaitanya chundru X-Patchwork-Id: 113658 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp8608873vqr; Tue, 27 Jun 2023 19:26:47 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ6H4SEajiZCGj0ogiwzHNGtqTCiS/w3RNibeNmN2VWnfscwgjqCE4QCRaEClXEVDOrwwdYW X-Received: by 2002:a05:6a00:24cf:b0:676:2a5c:7bc5 with SMTP id d15-20020a056a0024cf00b006762a5c7bc5mr9136839pfv.1.1687919207014; Tue, 27 Jun 2023 19:26:47 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1687919207; cv=none; d=google.com; s=arc-20160816; b=ePaUKM6RtodbD0H36CkmaeTTlFh0+sUMrGDY89BK1q5vxgpl3ySQrMwmjGKy4EoymV 8SEBBPVsLfJEvUs+IpLmL3Cw0ObSigoJqiACMOiyTj4+mQebPZXQtbW5YpZPsigGaKXz Cpch7hCIfbjlmI5KXE2f0Rm4ScqU5M6FoD2vzzlf9aLWplITy2vzdK2F1u8zzVux+5OG 49gDjOXcoM36uWZwVmrMAfXB7Aahf+5P5jK6DaZsuZsUb77hO/COdjiYg6I0UDkx5WWn JQkEgJ9nI3tpQuX9I9wtzHeHw2ydGYqIP7kk5JfvwiJx1iKFlvRIz4f7bsHmtL45qF7P G38A== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from:dkim-signature; bh=KD8N5E9vlU5WrsQ1+QykEqMDAfqTuaz+ZuNstkV14F8=; fh=9a3PWlW0sWMAnOREzZp2dy2Uqg1Q9qvhO0ww4RGf874=; b=G6mGs/0p2h4d/Zhu4bO0KL8Iw/kn6osxdxyjhOAYnE6k9jU2vwOKrcRC6Ruoow61Z1 HFH1niW5l7MFbm5+jZsPWl+nt696+/rkruOTrfjj8cO4Ytl679NC2r1/ZRjfFJbjY9YW GO8MyU4W6bQqYe8MHiY9PDm3OHw58epU7qb8i4lWu18aYrqXRzG5tqH0gjWRsjPDamu8 YrbsF3WRwqsW4/hLjdjtKDGyBxo9vDs6vkuTqYuZu9JMNgvARnnMFUZWMm5fxbeYhR6i JKhLv8rzB1OrMbcPrRgFaSyd1xjaRKiqfVO3w6Blc/dqqa0jBbJPHrf65zmLO7OhF1U1 MHOg== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=TE8hdStu; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: from out1.vger.email (out1.vger.email. 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Signed-off-by: Krishna chaitanya chundru Reviewed-by: Manivannan Sadhasivam --- arch/arm/boot/dts/qcom/qcom-sdx65.dtsi | 3 +++ 1 file changed, 3 insertions(+) diff --git a/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi b/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi index 1a35830..77fa97c 100644 --- a/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi +++ b/arch/arm/boot/dts/qcom/qcom-sdx65.dtsi @@ -332,6 +332,9 @@ ; interrupt-names = "global", "doorbell"; + interconnects = <&system_noc MASTER_PCIE_0 &mc_virt SLAVE_EBI1>; + interconnect-names = "pcie-mem"; + resets = <&gcc GCC_PCIE_BCR>; reset-names = "core"; From patchwork Wed Jun 28 02:19:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Krishna chaitanya chundru X-Patchwork-Id: 113660 Return-Path: Delivered-To: ouuuleilei@gmail.com Received: by 2002:a59:994d:0:b0:3d9:f83d:47d9 with SMTP id k13csp8609273vqr; Tue, 27 Jun 2023 19:27:46 -0700 (PDT) X-Google-Smtp-Source: ACHHUZ4cedm/CW4yxeoYUGLNq7HUw4sFmZPABNSRUdl/3IkFyhaiwevJoKN29NOtWS35Zd1waakr X-Received: by 2002:a05:6a20:8f22:b0:111:ee3b:59a7 with SMTP id b34-20020a056a208f2200b00111ee3b59a7mr44591065pzk.5.1687919266604; Tue, 27 Jun 2023 19:27:46 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1687919266; cv=none; d=google.com; s=arc-20160816; b=Fg0Zok4jGa42xZ7zJ1T9wpKKtxAsOh3W7Oa2pY9+FIhxPrunmH8D3LlBdthAyEjhF/ W46Lv+McPrxkJx3pLV5VYK8f9vMt8aWjWGw5uewlDObSUvm3AVmZxFIJcyjhGs+Fudik o1pbmOKFmCgmxsTjILfj68YoNwd/Z/ijB1fMstdpyqkB+b1o3nTg+0GVverNHVcr05XZ /8XsFLH1jh10WqzFILX0FdbVAzKDUzO7/3YHEGmoy0rG8cD1aBVW1hbmrAKoqntiy9LX BbsE/A6TTctMTPLQvQlUEZJ4f0PVZfYgEpfev4O0NauJr8YiV1UmVjHmo/9asjUjIm1b 2R4w== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:references:in-reply-to:message-id:date:subject :cc:to:from:dkim-signature; bh=ttJH+Q+I3EfsLN6bXozDeQAWJd5T2I47/qF5gVd0jWs=; fh=rZg3lIvN0abm+bcKRxTVDozxw/bYHp1ZLDp2JcSIm88=; b=zDkOU2pwYTpcPCvXGhhVP9i677AnnLhaRs8dZl4JpPk4XdPDC5N80cmkdDocKCMXir uTPFAP3JvlBFzeEo3EKarSvxi2RcQ32f95TemVewcgVcOx+3CB+dnWm4Qj20by6kslZF PpuKF4Jm2Hd2lbVhFrX6o63bGK4nGVZ1myuprLuGyxtl3HLZvfudMI4iSEg0TbIcXHxG rWhrL5Qdcfn/ynOk74JkYYb2gn91hKItj4ZWLY1hrKsgqwgKG/tz56dVs4BuTaCKIn0L N5f8AkVEFq9e2MrgpPfP7mBDf+uOqQqCKyrN8gqtmdPbrU/R5GFXkMkOqUzYjm7eg40L 0kLQ== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@quicinc.com header.s=qcppdkim1 header.b=N47c2hC7; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=quicinc.com Received: from out1.vger.email (out1.vger.email. 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Wed, 28 Jun 2023 02:19:37 +0000 Received: from pps.filterd (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 35S2JYLl023401; Wed, 28 Jun 2023 02:19:34 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 3rdsjkqpku-1; Wed, 28 Jun 2023 02:19:34 +0000 Received: from APBLRPPMTA01.qualcomm.com (APBLRPPMTA01.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 35S2JYi4023365; Wed, 28 Jun 2023 02:19:34 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.112]) by APBLRPPMTA01.qualcomm.com (PPS) with ESMTP id 35S2JYWm023378; Wed, 28 Jun 2023 02:19:34 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id CAD9B4AB0; Wed, 28 Jun 2023 07:49:33 +0530 (+0530) From: Krishna chaitanya chundru To: manivannan.sadhasivam@linaro.org Cc: helgaas@kernel.org, linux-pci@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org, quic_vbadigan@quicinc.com, quic_nitegupt@quicinc.com, quic_skananth@quicinc.com, quic_ramkri@quicinc.com, krzysztof.kozlowski@linaro.org, Krishna chaitanya chundru , Manivannan Sadhasivam , Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy=C5=84?= =?utf-8?q?ski?= , Rob Herring , Bjorn Helgaas Subject: [PATCH v6 3/3] PCI: qcom-ep: Add ICC bandwidth voting support Date: Wed, 28 Jun 2023 07:49:30 +0530 Message-Id: <1687918770-28416-4-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1687918770-28416-1-git-send-email-quic_krichai@quicinc.com> References: <1687918770-28416-1-git-send-email-quic_krichai@quicinc.com> X-QCInternal: smtphost X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: 4c_IRJWZn8azrW_71qhcIFw_Gsof8pWm X-Proofpoint-GUID: 4c_IRJWZn8azrW_71qhcIFw_Gsof8pWm X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.591,FMLib:17.11.176.26 definitions=2023-06-27_16,2023-06-27_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 impostorscore=0 suspectscore=0 phishscore=0 mlxlogscore=999 lowpriorityscore=0 clxscore=1015 adultscore=0 mlxscore=0 bulkscore=0 spamscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306280019 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,SPF_HELO_NONE, SPF_NONE,T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED 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 X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1769911633063751939?= X-GMAIL-MSGID: =?utf-8?q?1769911633063751939?= Add support to vote for ICC bandwidth based on the link speed and width. This patch is inspired from pcie-qcom driver to add basic interconnect support. Reference: commit c4860af88d0c ("PCI: qcom: Add basic interconnect support"). Signed-off-by: Krishna chaitanya chundru --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 72 ++++++++++++++++++++++++++++++- 1 file changed, 71 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 1435f51..b7d7038 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -28,6 +29,7 @@ #define PARF_SYS_CTRL 0x00 #define PARF_DB_CTRL 0x10 #define PARF_PM_CTRL 0x20 +#define PARF_PM_STTS 0x24 #define PARF_MHI_CLOCK_RESET_CTRL 0x174 #define PARF_MHI_BASE_ADDR_LOWER 0x178 #define PARF_MHI_BASE_ADDR_UPPER 0x17c @@ -133,6 +135,11 @@ #define CORE_RESET_TIME_US_MAX 1005 #define WAKE_DELAY_US 2000 /* 2 ms */ +#define PCIE_GEN1_BW_MBPS 250 +#define PCIE_GEN2_BW_MBPS 500 +#define PCIE_GEN3_BW_MBPS 985 +#define PCIE_GEN4_BW_MBPS 1969 + #define to_pcie_ep(x) dev_get_drvdata((x)->dev) enum qcom_pcie_ep_link_status { @@ -178,6 +185,8 @@ struct qcom_pcie_ep { struct phy *phy; struct dentry *debugfs; + struct icc_path *icc_mem; + struct clk_bulk_data *clks; int num_clks; @@ -253,9 +262,50 @@ static void qcom_pcie_dw_stop_link(struct dw_pcie *pci) disable_irq(pcie_ep->perst_irq); } +static void qcom_pcie_ep_icc_update(struct qcom_pcie_ep *pcie_ep) +{ + struct dw_pcie *pci = &pcie_ep->pci; + u32 offset, status, bw; + int speed, width; + int ret; + + if (!pcie_ep->icc_mem) + return; + + offset = dw_pcie_find_capability(pci, PCI_CAP_ID_EXP); + status = readw(pci->dbi_base + offset + PCI_EXP_LNKSTA); + + speed = FIELD_GET(PCI_EXP_LNKSTA_CLS, status); + width = FIELD_GET(PCI_EXP_LNKSTA_NLW, status); + + switch (speed) { + case 1: + bw = MBps_to_icc(PCIE_GEN1_BW_MBPS); + break; + case 2: + bw = MBps_to_icc(PCIE_GEN2_BW_MBPS); + break; + case 3: + bw = MBps_to_icc(PCIE_GEN3_BW_MBPS); + break; + default: + dev_warn(pci->dev, "using default GEN4 bandwidth\n"); + fallthrough; + case 4: + bw = MBps_to_icc(PCIE_GEN4_BW_MBPS); + break; + } + + ret = icc_set_bw(pcie_ep->icc_mem, 0, width * bw); + if (ret) + dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n", + ret); +} + static int qcom_pcie_enable_resources(struct qcom_pcie_ep *pcie_ep) { int ret; + struct dw_pcie *pci = &pcie_ep->pci; ret = clk_bulk_prepare_enable(pcie_ep->num_clks, pcie_ep->clks); if (ret) @@ -277,8 +327,23 @@ static int qcom_pcie_enable_resources(struct qcom_pcie_ep *pcie_ep) if (ret) goto err_phy_exit; - return 0; + /* + * Some Qualcomm platforms require interconnect bandwidth constraints + * to be set before enabling interconnect clocks. + * + * Set an initial peak bandwidth corresponding to single-lane Gen 1 + * for the pcie-mem path. + */ + ret = icc_set_bw(pcie_ep->icc_mem, 0, MBps_to_icc(PCIE_GEN1_BW_MBPS)); + if (ret) { + dev_err(pci->dev, "failed to set interconnect bandwidth: %d\n", + ret); + goto err_phy_off; + } + return 0; +err_phy_off: + phy_power_off(pcie_ep->phy); err_phy_exit: phy_exit(pcie_ep->phy); err_disable_clk: @@ -550,6 +615,10 @@ static int qcom_pcie_ep_get_resources(struct platform_device *pdev, if (IS_ERR(pcie_ep->phy)) ret = PTR_ERR(pcie_ep->phy); + pcie_ep->icc_mem = devm_of_icc_get(dev, "pcie-mem"); + if (IS_ERR(pcie_ep->icc_mem)) + ret = PTR_ERR(pcie_ep->icc_mem); + return ret; } @@ -573,6 +642,7 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) } else if (FIELD_GET(PARF_INT_ALL_BME, status)) { dev_dbg(dev, "Received BME event. Link is enabled!\n"); pcie_ep->link_status = QCOM_PCIE_EP_LINK_ENABLED; + qcom_pcie_ep_icc_update(pcie_ep); pci_epc_bme_notify(pci->ep.epc); } else if (FIELD_GET(PARF_INT_ALL_PM_TURNOFF, status)) { dev_dbg(dev, "Received PM Turn-off event! Entering L23\n");