From patchwork Wed May 10 03:19:25 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bjorn Andersson X-Patchwork-Id: 13236248 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 0721FC77B75 for ; Wed, 10 May 2023 03:20:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235772AbjEJDUw (ORCPT ); Tue, 9 May 2023 23:20:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59274 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235525AbjEJDUO (ORCPT ); Tue, 9 May 2023 23:20:14 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E89094C13; Tue, 9 May 2023 20:20:01 -0700 (PDT) Received: from pps.filterd (m0279867.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34A2bLll012971; Wed, 10 May 2023 03:19:37 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 : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=tLeize3aORtY1HY16zn7YF0QGrv53yBUPWo63R/J7QI=; b=JXEW/CDw/28MKg0wMuNqxnyD7hgqCoKLWjXHJs7SGPWFrFEWIs/EnjFrnmjo6ggeWiwg X3ZA1LkPTqWTTsOVyTA6wCmGoZMxEcXfT9f06ZHoB5ceUNF+O3QruEQLy62H59pMWS13 +R3HH/76DGs2wczHdrHii0vTyi1O9s1kA1ABLhjao88d8iYREbqDLiYCLOdt2BE6yH3G xIv477omJLxC76qtCFy8GGcSMV8O2/mnjVBc7CdGzd9gjOFSe0p9y/+/S0Gd9P6WEcil lvjWJ4GGX0lqkBoNBhI23CgvmupVW+OnGPX1ABh/xoAzJTAo58RX/qkg/L6ly3ZGQbxQ 4g== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qf77g3dq8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 03:19:37 +0000 Received: from nalasex01c.na.qualcomm.com (nalasex01c.na.qualcomm.com [10.47.97.35]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 34A3JaEr016023 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 03:19:36 GMT Received: from hu-bjorande-lv.qualcomm.com (10.49.16.6) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.42; Tue, 9 May 2023 20:19:36 -0700 From: Bjorn Andersson To: Vinod Koul , Kishon Vijay Abraham I , Johan Hovold CC: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , , , , Subject: [PATCH v2 3/8] phy: qcom-qmp-combo: Extend phy_mutex to all phy_ops Date: Tue, 9 May 2023 20:19:25 -0700 Message-ID: <20230510031930.1996020-4-quic_bjorande@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230510031930.1996020-1-quic_bjorande@quicinc.com> References: <20230510031930.1996020-1-quic_bjorande@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01b.na.qualcomm.com (10.47.209.197) To nalasex01c.na.qualcomm.com (10.47.97.35) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: UhI58YbhWgPJ469hAFQL98Ay1_8i7ZaZ X-Proofpoint-ORIG-GUID: UhI58YbhWgPJ469hAFQL98Ay1_8i7ZaZ X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-09_16,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 phishscore=0 mlxlogscore=999 malwarescore=0 clxscore=1015 mlxscore=0 suspectscore=0 priorityscore=1501 bulkscore=0 lowpriorityscore=0 spamscore=0 adultscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305100024 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org The phy core ensures mutual exclusion across the ops for a given phy, but the upcoming introduction of USB Type-C orientation switching might race with the DisplayPort phy operations. So extend the mutual exclusion to cover the remaining ops as well, to avoid concurrent reconfiguration of the hardware. Reported-by: Johan Hovold Signed-off-by: Bjorn Andersson Reviewed-by: Johan Hovold --- Changes since v1: - New patch drivers/phy/qualcomm/phy-qcom-qmp-combo.c | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c index 8918ba2b18a4..6baacdf3a4cb 100644 --- a/drivers/phy/qualcomm/phy-qcom-qmp-combo.c +++ b/drivers/phy/qualcomm/phy-qcom-qmp-combo.c @@ -2437,12 +2437,16 @@ static int qmp_combo_dp_configure(struct phy *phy, union phy_configure_opts *opt struct qmp_combo *qmp = phy_get_drvdata(phy); const struct qmp_phy_cfg *cfg = qmp->cfg; + mutex_lock(&qmp->phy_mutex); + memcpy(&qmp->dp_opts, dp_opts, sizeof(*dp_opts)); if (qmp->dp_opts.set_voltages) { cfg->configure_dp_tx(qmp); qmp->dp_opts.set_voltages = 0; } + mutex_unlock(&qmp->phy_mutex); + return 0; } @@ -2450,11 +2454,16 @@ static int qmp_combo_dp_calibrate(struct phy *phy) { struct qmp_combo *qmp = phy_get_drvdata(phy); const struct qmp_phy_cfg *cfg = qmp->cfg; + int ret = 0; + + mutex_lock(&qmp->phy_mutex); if (cfg->calibrate_dp_phy) - return cfg->calibrate_dp_phy(qmp); + ret = cfg->calibrate_dp_phy(qmp); - return 0; + mutex_unlock(&qmp->phy_mutex); + + return ret; } static int qmp_combo_com_init(struct qmp_combo *qmp) @@ -2578,6 +2587,8 @@ static int qmp_combo_dp_power_on(struct phy *phy) void __iomem *tx = qmp->dp_tx; void __iomem *tx2 = qmp->dp_tx2; + mutex_lock(&qmp->phy_mutex); + qmp_combo_dp_serdes_init(qmp); qmp_combo_configure_lane(tx, cfg->dp_tx_tbl, cfg->dp_tx_tbl_num, 1); @@ -2589,6 +2600,8 @@ static int qmp_combo_dp_power_on(struct phy *phy) /* Configure link rate, swing, etc. */ cfg->configure_dp_phy(qmp); + mutex_unlock(&qmp->phy_mutex); + return 0; } @@ -2596,9 +2609,13 @@ static int qmp_combo_dp_power_off(struct phy *phy) { struct qmp_combo *qmp = phy_get_drvdata(phy); + mutex_lock(&qmp->phy_mutex); + /* Assert DP PHY power down */ writel(DP_PHY_PD_CTL_PSR_PWRDN, qmp->dp_dp_phy + QSERDES_DP_PHY_PD_CTL); + mutex_unlock(&qmp->phy_mutex); + return 0; }