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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-ba8f9ed21f6sm1151495a12.13.2025.11.05.21.21.07 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 05 Nov 2025 21:21:09 -0800 (PST) Message-ID: <427a8b79-075e-43d6-b580-510f99f547c9@oss.qualcomm.com> Date: Thu, 6 Nov 2025 13:21:04 +0800 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 0/3] add sysfs nodes to configure TPDA's registers To: Suzuki K Poulose , Mike Leach , James Clark , Alexander Shishkin , Tingwei Zhang Cc: coresight@lists.linaro.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Tao Zhang References: <20251028-configure_tpda_reg-v4-0-23000805d21d@oss.qualcomm.com> Content-Language: en-US From: Jie Gan In-Reply-To: <20251028-configure_tpda_reg-v4-0-23000805d21d@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: MTDMxgTesyqOMAXU6ErrzeYjckhLi8nh X-Authority-Analysis: v=2.4 cv=P443RyAu c=1 sm=1 tr=0 ts=690c3047 cx=c_pps a=RP+M6JBNLl+fLTcSJhASfg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=6UeiqGixMTsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=VwQbUJbxAAAA:8 a=EUspDBNiAAAA:8 a=rf22lFbXz3lptHW25oMA:9 a=QEXdDO2ut3YA:10 a=iS9zxrgQBfv6-_F4QbHw:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUxMTA2MDA0MCBTYWx0ZWRfX93bIfjvy1LFZ mKWtBAn12K8eulBJZM8wf/+7hx6fOZmwqxB8LqXzeQsfdUnXW1lKSiCv6P6alU6VqMa5o4N3c7X 8diTs9K1JDroybAD+ulLV4phOS+fhta2bxa8ydXL8cNsHrJYwY0frYig7Gj4bTsy/gvNIXWNg50 mc8brQTD87pGsVnuosLgfj1DnVA+KF1mcmRcoYpQJc0KL4Z+JeWbokeWt16q4sQVuCUfVKdpgXt P02S3nIMrjMXxeS3124Zoo7NCoE2QY+qnVUQ3C71D9AjheO4kSwbOx+YMAV+dBwOG79SO8APJSV 1V15AbKiMxZzlziz+lIlmmrRKdKm3B1EuwXZ2lYWCes/QMk7FZdkK3xbGcu/xQIWwGjFFRmgUGq Jbs0RK2z+W1d/PbuozpuL9IkkT+5Hg== X-Proofpoint-ORIG-GUID: MTDMxgTesyqOMAXU6ErrzeYjckhLi8nh X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1121,Hydra:6.1.9,FMLib:17.12.100.49 definitions=2025-11-05_09,2025-11-03_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 priorityscore=1501 suspectscore=0 impostorscore=0 phishscore=0 malwarescore=0 bulkscore=0 lowpriorityscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2510240001 definitions=main-2511060040 On 10/28/2025 10:02 AM, Jie Gan wrote: > Patchset 1 introduces configuration of the cross-trigger registers with > appropriate values to enable proper generation of cross-trigger packets. > > Patchset 2 introduces a logic to configure the TPDA_SYNCR register, > which determines the frequency of ASYNC packet generation. These packets > assist userspace tools in accurately identifying each valid packet. > > Patchset 3 introduces a sysfs node to initiate a flush request for the > specific port, forcing the data to synchronize and be transmitted to the > sink device. > Gentle reminder. > Changes in V4: > 1. Document sysfs nodes with correct kernel version and date. > Link to V3 - https://lore.kernel.org/linux-arm-kernel/20250827105545.7140-1-jie.gan@oss.qualcomm.com/ > > Changes in V3: > 1. Optimizing codes according to James's comment. > Link to V2 - https://lore.kernel.org/all/20250827042042.6786-1-jie.gan@oss.qualcomm.com/ > > Changes in V2: > 1. Refactoring the code based on James's comment for optimization. > Link to V1 - https://lore.kernel.org/all/20250826070150.5603-1-jie.gan@oss.qualcomm.com/ > > Signed-off-by: Jie Gan > --- > Tao Zhang (3): > coresight: tpda: add sysfs nodes for tpda cross-trigger configuration > coresight: tpda: add logic to configure TPDA_SYNCR register > coresight: tpda: add sysfs node to flush specific port > > .../ABI/testing/sysfs-bus-coresight-devices-tpda | 50 ++++ > drivers/hwtracing/coresight/coresight-tpda.c | 278 +++++++++++++++++++++ > drivers/hwtracing/coresight/coresight-tpda.h | 33 ++- > 3 files changed, 360 insertions(+), 1 deletion(-) > --- > base-commit: 8fec172c82c2b5f6f8e47ab837c1dc91ee3d1b87 > change-id: 20251028-configure_tpda_reg-f3396f97f9a1 > > Best regards,