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[103.229.16.4]) by smtp.gmail.com with ESMTPSA id d2e1a72fcca58-82b03bbeff2sm9798291b3a.20.2026.03.23.07.18.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2026 07:18:42 -0700 (PDT) Message-ID: <8529bd5e-0a93-4d53-b6b3-e7dd2135cfb1@oss.qualcomm.com> Date: Mon, 23 Mar 2026 22:18:35 +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-Authority-Analysis: v=2.4 cv=fKc0HJae c=1 sm=1 tr=0 ts=69c14bc4 cx=c_pps a=oF/VQ+ItUULfLr/lQ2/icg==:117 a=nuhDOHQX5FNHPW3J6Bj6AA==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yOCtJkima9RkubShWh1s:22 a=EUspDBNiAAAA:8 a=25pNCHLBOcfxwS3ibeIA:9 a=QEXdDO2ut3YA:10 a=3WC7DwWrALyhR5TkjVHa:22 X-Proofpoint-GUID: yWvjKGeO_JVXunHjw3BNe5B2GEd4fIg6 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIzMDExMCBTYWx0ZWRfX+xPQsE8pXIS3 /fyoGb2/02jNKTovf2YXYghQAcpG6remPlT5OxqP3YEm3T25D2iRXutYyaKthHm9s8rabFQ1y0u g7PsOZ8OYORI50SK4/9tNskF24uNSPSaip5uFToSVlHYNlkktY+CS8sUuxK5iw9r/TGObAtcacR qfGSB4Y2GvFlU6ewOFA3gvM/XMfbYwB+O3SwPpaAeJkZ757qCEYf6aq+UMYY5FEQvdZokHf8ono v3uc8hWrYpm35w71jI1o25D7Sx+VA/EeqG5YZWqWZUkqyA+5LgfOVqgey/wbx3tms2YksqDT27J MoQ1B5VWGHBOFcaRtOv7Vj3aL4/TTyl/0fRVabIW/1MVKd+Qrq5jdIxtt0QIZVjdx3edY04HqtM fc81Sxxz+KSF678HvnNvfQAU95Z9+9YLcPwb1jL61kaShLM0wL176SiUW0hIDoWbJvaOnqPtwBv IpMI/IjcKsd1vEUHgxA== X-Proofpoint-ORIG-GUID: yWvjKGeO_JVXunHjw3BNe5B2GEd4fIg6 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=2026-03-23_04,2026-03-23_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 impostorscore=0 priorityscore=1501 phishscore=0 lowpriorityscore=0 adultscore=0 bulkscore=0 spamscore=0 suspectscore=0 malwarescore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230110 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 BTW, the debug team is working with the hardware/AOP team to enable certain TPDM devices that have clock-related issues. Typically, we do not enable devices with known issues on platforms until those issues are resolved (e.g., TPDM DCC). Thanks, Jie > > Konrad