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Thu, 21 Mar 2024 08:32:50 GMT Received: from taozha-gv.qualcomm.com (10.80.80.8) 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 15.2.1118.40; Thu, 21 Mar 2024 01:32:45 -0700 From: Tao Zhang To: Mathieu Poirier , Suzuki K Poulose , Alexander Shishkin , Konrad Dybcio , Mike Leach , Rob Herring , Krzysztof Kozlowski CC: Tao Zhang , Jinlong Mao , Leo Yan , Greg Kroah-Hartman , , , , , Tingwei Zhang , Yuanfang Zhang , Trilok Soni , Song Chai , , Subject: [PATCH 4/4] coresight-tpda: Add support multi-port input on TPDA Date: Thu, 21 Mar 2024 16:32:07 +0800 Message-ID: <1711009927-17873-5-git-send-email-quic_taozha@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1711009927-17873-1-git-send-email-quic_taozha@quicinc.com> References: <1711009927-17873-1-git-send-email-quic_taozha@quicinc.com> Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) 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-ORIG-GUID: hhH7l2_2HQApscZ2O8blWgoDCff1rfuV X-Proofpoint-GUID: hhH7l2_2HQApscZ2O8blWgoDCff1rfuV X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.1011,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2024-03-21_05,2024-03-18_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 phishscore=0 mlxlogscore=999 malwarescore=0 clxscore=1015 adultscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2403140001 definitions=main-2403210056 Since the funnel supports multi-port output scenarios, there may be more than one TPDM connected to one TPDA input port. In this way, when reading the element size of the TPDM, TPDA driver needs to find the correct TPDM corresponding to the input port. When TPDA finds a TPDM on an input port, it read the device tree of the TPDM and finds the configured TPDA input port number. If it is the same as the input port number passed into the function, then it is the correct TPDM that needs to be found. Signed-off-by: Tao Zhang --- drivers/hwtracing/coresight/coresight-tpda.c | 27 +++++++++++++++++++- 1 file changed, 26 insertions(+), 1 deletion(-) diff --git a/drivers/hwtracing/coresight/coresight-tpda.c b/drivers/hwtracing/coresight/coresight-tpda.c index 52b0201090fb..ba71e1ff18e3 100644 --- a/drivers/hwtracing/coresight/coresight-tpda.c +++ b/drivers/hwtracing/coresight/coresight-tpda.c @@ -84,6 +84,26 @@ static int tpdm_read_element_size(struct tpda_drvdata *drvdata, return rc; } +/* + * Check if the parameter of the input port number in "tpda_get_element_size" + * is the same as the property of the TPDA input port number defined in the device + * tree. + * Return true if they are the same or the property is not read. + * Otherwise, return false. + */ +static bool is_tpda_inport_matched(struct coresight_device *csdev, u32 tpda_inport) +{ + int rc = -EINVAL; + u32 inport_nr; + + rc = fwnode_property_read_u32(dev_fwnode(csdev->dev.parent), + "qcom,tpda-input-port", &inport_nr); + if (!rc) + return (inport_nr == tpda_inport); + + return true; +} + /* * Search and read element data size from the TPDM node in * the devicetree. Each input port of TPDA is connected to @@ -99,6 +119,10 @@ static int tpda_get_element_size(struct tpda_drvdata *drvdata, int rc = 0; int i; struct coresight_device *in; + static u32 tpda_inport; + + if (inport != -1) + tpda_inport = inport; for (i = 0; i < csdev->pdata->nr_inconns; i++) { in = csdev->pdata->in_conns[i]->src_dev; @@ -110,7 +134,8 @@ static int tpda_get_element_size(struct tpda_drvdata *drvdata, csdev->pdata->in_conns[i]->dest_port != inport) continue; - if (coresight_device_is_tpdm(in)) { + if (coresight_device_is_tpdm(in) && + (is_tpda_inport_matched(in, tpda_inport))) { if (drvdata->dsb_esize || drvdata->cmb_esize) return -EEXIST; rc = tpdm_read_element_size(drvdata, in);