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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: devicetree@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: AW1haW4tMjYwNjI5MDA4MiBTYWx0ZWRfX8Cms6a7xxi3O UGUvDxMscjViQAfadqosoaF79OD+g5082VoK7Ze1M8IDwN8nSmslmYLpUKQ0IDEFdu9ObWMLHdN 8GrWJ9Z0vyI2I8+1Fs5SsmApEbrVBwc= 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: B1-wEz_o9nGc_HfqMyab8it8roDdNOX7 X-Proofpoint-ORIG-GUID: B1-wEz_o9nGc_HfqMyab8it8roDdNOX7 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNjI5MDA4MiBTYWx0ZWRfX7Q/OwrYWeuEf jjjiMEPD3dqRG/BJafdLfEykWt9f6DpQmlGaLspyFrS16xZfkd5kzXbaXIOg4AUn/Ch9DYlRkiF xajCguQarP5WTNBUF6dlwZx+hlK6dKsEodAm31O14y4E2q5cYcJSHfwc3vFBdds4iYiRaXtbhqr /C0WpRX4fa0MNFXCp6Rf+t4QP18hU+a5MgZ23lUYZjgC/P73xHL2cIcGUQr9x70i4MitkPGr2RE G7x8VoN18Vhyw5AH2ddUi2S7UPNJunEM410r3SU9QmbAxs0vbx3e5dBuI5OdP0phekfQ9DgK7s5 alNGQxH/GDZz8lc4NBl+N7iBuY+JzYn0R7aqDAbSNEf4dmWAhi8tFcndOKBGeOvxQHNBbChagzM ia+ZXgQzoPQgaiVn8/nrU+1ffDq41PjxrEg7pkXRNZT6tWH7klUrVTgsFIvhslvuTQpwQRnDLcs dhp9MQ6zk+zooAdMGoA== 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