From patchwork Fri Sep 8 06:53:36 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: 13377183 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 B033FEE57DD for ; Fri, 8 Sep 2023 06:54:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242338AbjIHGyT (ORCPT ); Fri, 8 Sep 2023 02:54:19 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33248 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S242303AbjIHGyR (ORCPT ); Fri, 8 Sep 2023 02:54:17 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 089511BE7; Thu, 7 Sep 2023 23:54:13 -0700 (PDT) Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 388671BJ017468; Fri, 8 Sep 2023 06:54:05 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : references : in-reply-to : to : cc; s=qcppdkim1; bh=Sxt2/AesRTRq7G6Vm9pac+N9rls9QqefJr3NSZO3XH0=; b=TYEJHwyph6ChVIpzCET7rcpNgIgroOlTeTKpRbMHLZVwoCIlSDEKhgdSamRg+IYeOrgu Op0XYyupzjJPYZVw/h9CW+hxTG5IUd6JwSeJygZKwwmHcI7USD9VVb7GvBUeIua9foMq w/7dxEIaFGwpJ6RDGTfejJVHlXS9plhgenUm999yhGS+zec9BMrg5j8ww5A7L34hpmTx gLCBz5F+6EeZ17WPKUtVZBABOVwcNsi6z5/XxRwDHEQnitoZ4suv+83TRhxeSXGdDWCn 7yTuUKww/+bBez3UH2hgd08jwjuz1GP6Grie1aFi2kcGCam8oEjKyOouu8uO1AfRyBxj kw== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3syf5c1yg5-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 08 Sep 2023 06:54:05 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3886s4H5007201 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 8 Sep 2023 06:54:04 GMT Received: from hu-krichai-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.36; Thu, 7 Sep 2023 23:54:00 -0700 From: Krishna chaitanya chundru Date: Fri, 8 Sep 2023 12:23:36 +0530 Subject: [PATCH v6 2/4] PCI: qcom-ep: Add support for D-state change notification MIME-Version: 1.0 Message-ID: <20230908-dstate_change-v6-2-b414a6edd765@quicinc.com> References: <20230908-dstate_change-v6-0-b414a6edd765@quicinc.com> In-Reply-To: <20230908-dstate_change-v6-0-b414a6edd765@quicinc.com> To: Lorenzo Pieralisi , =?utf-8?q?Krzysztof_Wilczy?= =?utf-8?q?=C5=84ski?= , Manivannan Sadhasivam , Kishon Vijay Abraham I , Bjorn Helgaas , Jonathan Corbet , Rob Herring CC: , , , , , Krishna chaitanya chundru X-Mailer: b4 0.13-dev-83828 X-Developer-Signature: v=1; a=ed25519-sha256; t=1694156032; l=1690; i=quic_krichai@quicinc.com; s=20230907; h=from:subject:message-id; bh=7+fZlP+EjfzIGzfl9thzeVMRXwgPe/8fqtyjrkfcWYM=; b=uNHFDsG3il+U8v679Cu7FfTy6QaK2MIzhlbGC9xYVhOos7Mf6J3JQe4vsgS1gf7P0yAEtSmFh nLwZ/4zXrnlBEuYyJVwM26rDEKVLHZq6vGGMnDawUhjqJYsjqSWf6Zx X-Developer-Key: i=quic_krichai@quicinc.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: 8q03IGRjgDi7hmCODU_37TvpI5nlNi8l X-Proofpoint-ORIG-GUID: 8q03IGRjgDi7hmCODU_37TvpI5nlNi8l X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.267,Aquarius:18.0.957,Hydra:6.0.601,FMLib:17.11.176.26 definitions=2023-09-08_03,2023-09-05_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 spamscore=0 lowpriorityscore=0 phishscore=0 malwarescore=0 suspectscore=0 impostorscore=0 bulkscore=0 mlxlogscore=995 mlxscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2308100000 definitions=main-2309080062 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 Reviewed-by: Manivannan Sadhasivam --- drivers/pci/controller/dwc/pcie-qcom-ep.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/pci/controller/dwc/pcie-qcom-ep.c b/drivers/pci/controller/dwc/pcie-qcom-ep.c index 8bd8107690a6..402ace57309d 100644 --- a/drivers/pci/controller/dwc/pcie-qcom-ep.c +++ b/drivers/pci/controller/dwc/pcie-qcom-ep.c @@ -633,6 +633,7 @@ 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); @@ -656,11 +657,16 @@ 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); - if (dstate == 3) { + state = dstate; + if (dstate == PCI_D3hot) { 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); + + 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);