From patchwork Fri Jul 7 11:03:49 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: 13304743 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33872C001B0 for ; Fri, 7 Jul 2023 11:04:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230503AbjGGLEz (ORCPT ); Fri, 7 Jul 2023 07:04:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60204 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230098AbjGGLEy (ORCPT ); Fri, 7 Jul 2023 07:04:54 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 50209211E; Fri, 7 Jul 2023 04:04:35 -0700 (PDT) Received: from pps.filterd (m0279863.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3677oDI6016200; Fri, 7 Jul 2023 11:04:28 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references; s=qcppdkim1; bh=T9H/joa8i3z+04yWseOBwYveNeLbratgjd+8XxajjYM=; b=BAsHoVM+u1qE7h9R1pDprQkzQxpVaMoZZR1psitXwX5eFrNmclJDyi4IhgzPpsk7Snb9 SkGcBX/W2qyHf7Wle+Y1k2Sqr+dVNqXNih/ayaXGYt7e0pwGlwpNv7HrzjkwnPloTGeH QuNugkxgFfAupHl/lmgrOK9g7nURM2QfZqku3yJqMyxilv404vgFbM6ohCZBpn9rrfG6 fnH1Oui0Z8xhMN40WrJfxpJdvizrbqDCTuAjb1IDVEl+ywxi6PjfTSVau1/dv3DSCZII 6bJdOhaZRpcfmpjv//vFmmyI+07ymOLEvZbfHYFFYSqYX5hr4KreAOdEpbzq3/hrJpWT mQ== Received: from apblrppmta02.qualcomm.com (blr-bdr-fw-01_GlobalNAT_AllZones-Outside.qualcomm.com [103.229.18.19]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3rpenqrhqb-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 07 Jul 2023 11:04:28 +0000 Received: from pps.filterd (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTP id 367B40Ex022731; Fri, 7 Jul 2023 11:04:00 GMT Received: from pps.reinject (localhost [127.0.0.1]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTPS id 3rjd7kq58d-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Fri, 07 Jul 2023 11:04:00 +0000 Received: from APBLRPPMTA02.qualcomm.com (APBLRPPMTA02.qualcomm.com [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 367B3xq8022722; Fri, 7 Jul 2023 11:03:59 GMT Received: from hu-sgudaval-hyd.qualcomm.com (hu-krichai-hyd.qualcomm.com [10.213.110.112]) by APBLRPPMTA02.qualcomm.com (PPS) with ESMTP id 367B3xka022713; Fri, 07 Jul 2023 11:03:59 +0000 Received: by hu-sgudaval-hyd.qualcomm.com (Postfix, from userid 4058933) id 109B64700; Fri, 7 Jul 2023 16:33:59 +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 v3 2/9] PCI: qcom-ep: Add support for D-state change notification Date: Fri, 7 Jul 2023 16:33:49 +0530 Message-Id: <1688727836-11141-3-git-send-email-quic_krichai@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1688727836-11141-1-git-send-email-quic_krichai@quicinc.com> References: <1688727836-11141-1-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: _Pw_hWmZoRVZ0oDRCIdrArFbyN_t-d5M X-Proofpoint-GUID: _Pw_hWmZoRVZ0oDRCIdrArFbyN_t-d5M 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=2023-07-07_07,2023-07-06_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 mlxlogscore=884 phishscore=0 mlxscore=0 priorityscore=1501 lowpriorityscore=0 bulkscore=0 impostorscore=0 clxscore=1015 suspectscore=0 adultscore=0 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2307070103 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add support to pass D-state change notification to Endpoint function driver. Signed-off-by: Krishna chaitanya chundru --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 0fe7f06..66fd421 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -561,6 +561,7 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) struct device *dev = pci->dev; u32 status = readl_relaxed(pcie_ep->parf + PARF_INT_ALL_STATUS); u32 mask = readl_relaxed(pcie_ep->parf + PARF_INT_ALL_MASK); + pci_power_t state; u32 dstate, val; writel_relaxed(status, pcie_ep->parf + PARF_INT_ALL_CLEAR); @@ -583,11 +584,16 @@ static irqreturn_t qcom_pcie_ep_global_irq_thread(int irq, void *data) dstate = dw_pcie_readl_dbi(pci, DBI_CON_STATUS) & DBI_CON_STATUS_POWER_STATE_MASK; dev_dbg(dev, "Received D%d state event\n", dstate); + state = dstate; if (dstate == 3) { val = readl_relaxed(pcie_ep->parf + PARF_PM_CTRL); val |= PARF_PM_CTRL_REQ_EXIT_L1; writel_relaxed(val, pcie_ep->parf + PARF_PM_CTRL); + state = PCI_D3hot; + if (gpiod_get_value(pcie_ep->reset)) + state = PCI_D3cold; } + pci_epc_dstate_notify(pci->ep.epc, state); } else if (FIELD_GET(PARF_INT_ALL_LINK_UP, status)) { dev_dbg(dev, "Received Linkup event. Enumeration complete!\n"); dw_pcie_ep_linkup(&pci->ep);