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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82b03bc66b3sm14625504b3a.21.2026.03.24.17.59.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 24 Mar 2026 17:59:15 -0700 (PDT) Message-ID: Date: Wed, 25 Mar 2026 08:59:09 +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 v2] arm64: dts: qcom: glymur: add coresight nodes To: Konrad Dybcio , Bjorn Andersson , Akhil P Oommen Cc: Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Tingwei Zhang , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260318-add-coresight-dt-nodes-for-glymur-v2-1-d76e08f21fa5@oss.qualcomm.com> <7972211e-d735-4401-ada9-b83c7b96b612@oss.qualcomm.com> <7993130c-5de0-439b-9263-69d6f327f5ab@oss.qualcomm.com> Content-Language: en-US From: Jie Gan In-Reply-To: <7993130c-5de0-439b-9263-69d6f327f5ab@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzI1MDAwNSBTYWx0ZWRfX6U4OViUvvskU 0YnKj7L0x57c4REEiDsUpcLx/XLZsvD6nsq3mAzXzmtV6xnpH+vOUjajYN0vHrRSlpH4PdvywIH QGXq7pYmM3dvHDUGtNHGdCRg2+ubRK9tylp/Hdcd2Fu8yhjcO2Yi8omiKpmdSWvhi/ePYLnZ++A sPPCo50JclE218nNT+Kk3gQnKi1g9ZIWdhBdbJyLyfmvoydoDj1NFlV5k8mVfVoqc9+3BPtoeNa uulfICslwN1mtazD5WVpRWTX47qxz8yQNEvlR/LRjy00WTD83u5+5O8uDgv8XiaUxJjQ5iVXIEa 3FJq6/FpAJyXW7Dlk1VBAoMbAPl5ETP42ErHXB+/A8llG4l/3D6lqaNy07cTi1cxqkq88CP7smF cs7vD6e6NVTltSHVWFCtXykbzmbbsvhNd6H1M70x8TIFWWc7/0FVj7At4ANmhWgfRgVlEa3zJEm 1WZf4tcePiKil9O5jdQ== X-Proofpoint-ORIG-GUID: AYU7HfwDPOdhU7peRVOurIhlKAPl_iTW X-Authority-Analysis: v=2.4 cv=Cd8FJbrl c=1 sm=1 tr=0 ts=69c33366 cx=c_pps a=rEQLjTOiSrHUhVqRoksmgQ==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=EUspDBNiAAAA:8 a=25pNCHLBOcfxwS3ibeIA:9 a=QEXdDO2ut3YA:10 a=2VI0MkxyNR6bbpdq8BZq:22 X-Proofpoint-GUID: AYU7HfwDPOdhU7peRVOurIhlKAPl_iTW X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-03-24_04,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 spamscore=0 bulkscore=0 priorityscore=1501 clxscore=1015 malwarescore=0 suspectscore=0 phishscore=0 lowpriorityscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250005 On 3/23/2026 10:12 PM, Konrad Dybcio wrote: > On 3/23/26 3:09 PM, Jie Gan wrote: >> >> >> On 3/23/2026 10:03 PM, Bjorn Andersson wrote: >>> On Mon, Mar 23, 2026 at 09:27:41PM +0800, Jie Gan wrote: >>>> >>>> >>>> On 3/23/2026 9:02 PM, Konrad Dybcio wrote: >>>>> On 3/23/26 1:30 PM, Jie Gan wrote: >>>>>> >>>>>> >>>>>> On 3/23/2026 7:05 PM, Konrad Dybcio wrote: >>>>>>> On 3/18/26 12:42 PM, Jie Gan wrote: >>>>>>>> Add CoreSight nodes to enable trace paths like TPDM->ETF/STM->ETF. >>>>>>>> These devices are part of the AOSS, CDSP, QDSS, PCIe5, TraceNoc and >>>>>>>> some small subsystems, such as GCC, IPCC, PMU and so on. >>>>>>>> >>>>>>>> Signed-off-by: Jie Gan >>>>>>>> --- >>>>>>>> Changes in V2: >>>>>>>> 1. removed two cti devices due to GFX block is down >>>>>>> >>>>>>> i.e. "because GPU is not yet enabled"? >>>>>> >>>>>> Yeah, these CTI devices have clock issue for enabling due to the GPU block is not yet enabled. >>>>> >>>>> Do they need the GPU to be online, or a clock from GPU_CC, or >>>>> maybe something else? >>>> >>>> We need a specific debug clock inside the GPU block. The debug clock only >>>> can be enabled while GPU is online. >>> >>> What happens once GPU has been delivered, but for some reason is >>> inactive and we try to use this CTI device? >> >> We will check these devices again once GPU is available. We also will cross check with AOP team if there is a clock enable/disable requirement with the specific debug clock. > > +Akhil for awareness, this is probably a solved problem downstream, but > I suppose this may be non-trivial with IFPC at play Regarding to the previous experience, these two CTI devices are irrelevant for debugging GPU issues and GPU team has no requirement on these devices on previous projects. We will add these devices once ready. Hi Akhil, Hope we can get the confirmation from GPU team. Thanks, Jie > > Konrad