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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-845cdfac944sm5773852b3a.12.2026.06.29.03.17.33 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 29 Jun 2026 03:17:36 -0700 (PDT) Message-ID: Date: Mon, 29 Jun 2026 18:17:08 +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 v14 0/7] Provide support for Trigger Generation Unit To: Greg KH Cc: andersson@kernel.org, alexander.shishkin@linux.intel.com, mike.leach@linaro.org, konrad.dybcio@oss.qualcomm.com, suzuki.poulose@arm.com, james.clark@arm.com, krzk+dt@kernel.org, conor+dt@kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, coresight@lists.linaro.org, devicetree@vger.kernel.org References: <20260417073336.2712426-1-songwei.chai@oss.qualcomm.com> <48c6abce-c492-46a6-84ef-3074983e817c@oss.qualcomm.com> <2026062959-distaste-launder-e253@gregkh> Content-Language: en-US From: "Songwei.Chai" In-Reply-To: <2026062959-distaste-launder-e253@gregkh> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Info: AW1haW4tMjYwNjI5MDA4MiBTYWx0ZWRfX4bE+3vCXUjom E8113GxsEcprsX4yxkiHRaMMplLXRuznx9OsCt6Q4F2nFxjlOr3n6Kpkeb1P5EcMpdJshFMVLm8 Y3PjEYdbrRuBuLo3nHXSfzA48JwbcTw= X-Authority-Analysis: v=2.4 cv=D+N37PRj c=1 sm=1 tr=0 ts=6a424642 cx=c_pps a=m5Vt/hrsBiPMCU0y4gIsQw==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=FelO9ux0wxsA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=Svlu2gy5LF0AZrWEB8IA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=IoOABgeZipijB_acs4fv:22 X-Proofpoint-GUID: W2FWtnKsH6HukxjgLxNhcBTsCSSanx0C X-Proofpoint-ORIG-GUID: W2FWtnKsH6HukxjgLxNhcBTsCSSanx0C X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI5MDA4MiBTYWx0ZWRfXxK4e07yJMKan +3a0583pYcnLkH3WBcxST7xxcJ/24BXu6GUwbrQSj1zwdRMYbDOWtHRB/To76++rcNZ7b7EY7h6 4RYW4BL5fAJMDx7ReerI1ThjSggGikoEAaUCtrJqkkNZw/O8aiNRpaz1ShiWMMJEzQjse4dt6Xs a4xZjsQs7cZ2E7c8BD2kb9oVKZyIo2FfvXHdj0brQV1L7gSt8Uvwkr01YgzHx8Fr6iPUv/ZhOgc w1/JnRdOoxIbWTR8s2IB7oSznCviiibP9n0WnTnpBkvnb9dG0+0zL1xW4JfdJ01GpUa1rPWQ8D8 Gdp9RUzzxYGYHG9Q+t2im2LnrQd01YN1DYF+cAV/snS6/dx1RtHFyufwKFncf+Czpzo9qIOmHpp G/b5zZvyL2TlA1hPpMTNnoz4Cee656EA2MlNkBawdxRmHM9BVojVuyCWaA0Y8HxlZVjOHQ/RKEh 3E4hGLO2mNiGKjwf7nQ== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.125,FMLib:17.12.100.49 definitions=2026-06-29_02,2026-06-26_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 clxscore=1015 suspectscore=0 bulkscore=0 impostorscore=0 malwarescore=0 lowpriorityscore=0 adultscore=0 spamscore=0 phishscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2606290082 On 6/29/2026 12:22 PM, Greg KH wrote: > On Mon, Jun 29, 2026 at 11:03:33AM +0800, Songwei.Chai wrote: >> Hi Greg & Alexander, >> >> Apologies for interrupting again. >> >> As the TGU hardware plays an important role in Qualcomm tracing design, I >> would greatly appreciate it if you could kindly take some time to review >> this at your earliest convenience. > The merge window _just_ closed, please give us a chance to catch up. > > Also, why us? Surely you have other reviewers for this code, right? Hi Greg, Understood, thanks for letting us know. Regarding your question: since this introduces a new drivers/hwtracing/qcom directory, there is no existing maintainer for it. Given your scope (and Alexander's), we believe you are the most relevant reviewers. The reason for creating the qcom directory is as follows: /We previously tried to upstream this driver under drivers/hwtracing/coresight,/ /but it was not accepted as it is considered Qualcomm-specific and not tightly/ /coupled with the CoreSight subsystem. Based on this feedback, we are exploring/ /a dedicated drivers/hwtracing/qcom directory, similar to intel_th, to better/ /support this and future Qualcomm hwtracing drivers./ More details can be found in “[PATCH v14 0/7] -- Why we are proposing this”. Thanks, Songwei > > thanks, > > greg k-h