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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b98335de3d7sm506512466b.36.2026.03.23.07.12.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 23 Mar 2026 07:12:03 -0700 (PDT) Message-ID: <7993130c-5de0-439b-9263-69d6f327f5ab@oss.qualcomm.com> Date: Mon, 23 Mar 2026 15:12:01 +0100 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: Jie Gan , 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> Content-Language: en-US From: Konrad Dybcio In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwMzIzMDExMCBTYWx0ZWRfX+a2YaY/n6+q8 BHoXI9FjrXGdV7aWNsI5Y1c8EcF2f/or1BKFhuHFX9p86YClB8CAnknmed6oA3O5XfsAa2UBd0n u6jIUxIuC7JOd5A2gbEVeAxI/rxHUkvro90XHENxVTKBO9sMvX6BIF9I89qOZBRUgp8BKcVMnXb 95vHHBvTF4GY2UweuKELWtkCzlVLAuuPME/cYroWlf1mHDGtyoEVlTSwIAJIcNWFoG7S8I+ABtm AbeuLOhwN4FA5ZFNnMmf2MP0qS5Tj5Djc2GEWTNJ7AHGH0UbBaoYaBXolnFlXOqOzU0QddLq6IH jRst3BQizc+7tyjE0xA93Rq6+vsGexO1NSaVxO7gwNACCOkBW/Ho130bnrP3MKEIG7yldkX+nZh VOPcdb23bdMS7vrOEjZCH0rT2fR73KWh6n1fzPbLvBHguA2LL/JvV7YRxdBCLbGehONPkjRdXCv GqsjK3djNS2L+NeWV7g== X-Authority-Analysis: v=2.4 cv=eMoeTXp1 c=1 sm=1 tr=0 ts=69c14a35 cx=c_pps a=JIY1xp/sjQ9K5JH4t62bdg==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=EUspDBNiAAAA:8 a=-Kv4HryMW5DkCN7ewZcA:9 a=QEXdDO2ut3YA:10 a=tNoRWFLymzeba-QzToBc:22 X-Proofpoint-GUID: mH_Zavbgoc2DduZJNwgLBUdHtFcPgBBw X-Proofpoint-ORIG-GUID: mH_Zavbgoc2DduZJNwgLBUdHtFcPgBBw 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 malwarescore=0 suspectscore=0 adultscore=0 lowpriorityscore=0 impostorscore=0 bulkscore=0 phishscore=0 spamscore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603230110 On 3/23/26 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 Konrad