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Wed, 09 Sep 2026 01:55:47 -0700 (PDT) Received: from hu-weiden-sha.qualcomm.com ([114.94.8.21]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-3397d6d1c16sm4496919eec.13.2026.09.09.01.55.42 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 09 Sep 2026 01:55:46 -0700 (PDT) From: Wei Deng To: Konrad Dybcio Cc: Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Manivannan Sadhasivam , quic_chezhou@quicinc.com, cheng.jiang@oss.qualcomm.com, shuai.zhang@oss.qualcomm.com, jinwang.li@oss.qualcomm.com, xiuzhuo.shang@oss.qualcomm.com, mengshi.wu@oss.qualcomm.com, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Konrad Dybcio , Dmitry Baryshkov Subject: Re: [PATCH v3 0/4] arm64: dts: qcom: Describe the PCIe M.2 Key E connector for Monaco EVK Date: Wed, 9 Sep 2026 14:25:40 +0530 Message-Id: <20260909085540.185221-1-wei.deng@oss.qualcomm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20260819-b4-monaco-evk-m2-v1-v3-0-988145ef65cd@oss.qualcomm.com> References: <20260819-b4-monaco-evk-m2-v1-v3-0-988145ef65cd@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTA5MDA5NyBTYWx0ZWRfX/C3UZ9P+XUud WBxEQzXkQV5acy7Ibh/I/T4Vex7qAsStzxsmIxgdpVasp070EYgR52aKwPeXZcGgiM7GR89mxhd 1Dhz+QmRdk8dEKKKZAYB8yXdyZhX+bW2Q2tI022mK5fzqV/sZPBh0V3lDgHP7sbHAWMELXqIJ4v uGLxbEaKEbHejvDv4G9znicVMkTSE7RQKE+aYPfWIUzP5dwyZmc8K3xq6M1QGTHYqbOGR2dafP7 TMNU2O6hChf9H0wY9jFGbT/l+rfFaRBTMYRzo/Ku+acU2RC+HlQ9p9TUuCygwPaeKn4bYYLD2sO dTuCciMM8YwfrnTsxYWdoG42GZEEhoFf0cDSO5LDXfETNm+6Zbn/1Onaj94bqPWqwoTLs4pM+5F Nnq3/TX/xvijDZJyfPTsbAJE4OJc/5TLBrPrrRg4tUfATS+Cc5LKyDRJIl5IN6W6XatPgpnHsa1 z2z4uk0Oz4Oli2Mujzg== X-Authority-Analysis: v=2.4 cv=Z5Xc2nRA c=1 sm=1 tr=0 ts=6aa11f15 cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=Uz3yg00KUFJ2y2WijEJ4bw==:17 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=Um2Pa8k9VHT-vaBCBUpS:22 a=VwQbUJbxAAAA:8 a=_XwftgCmqnCmiCopI18A:9 a=1OuFwYUASf3TG4hYMiVC:22 X-Proofpoint-GUID: wWC6Xcm7p-lCuKQthZV4WLzWYLntqWE6 X-Proofpoint-ORIG-GUID: wWC6Xcm7p-lCuKQthZV4WLzWYLntqWE6 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTA5MDA5NyBTYWx0ZWRfX6mIHtloDZpvr CYdzZNek1yeyzycTkzL9I6r+hyxe678w4J20x00o5kFpfseMWEJFx3pvG9Qw6/QPr4QewRFqpm+ m+GG59tgsPxori3ZKUTJkyquerm11/o= X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-08_03,2026-09-08_03,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 impostorscore=0 lowpriorityscore=0 bulkscore=0 malwarescore=0 adultscore=0 phishscore=0 priorityscore=1501 spamscore=0 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2609090097 Hi Konrad, On Wed, 19 Aug 2026 19:27:31 +0530, Wei Deng wrote: > Patch 4/4 moves the graph port/endpoint anchors from monaco.dtsi to > monaco-evk.dts. This ensures of_graph_is_present() only returns true > for boards that have an M.2 Key E connector present, preventing > unintended pwrseq probe on boards with soldered wireless chips > (e.g. qcs8300-ride). I reached out to Manivannan to ask whether it would be acceptable to change the M.2 detection in hci_qca.c from of_graph_is_present() to of_graph_get_remote_endpoint(). His reply [1]: > This means, the dummy port/endpoint node will always be present even > when the M.2 connector is not used. I don't see a compelling reason > to do so. > > - Mani Given that feedback, the DTSI anchor approach (which you originally suggested and reviewed) cannot proceed without the hci_qca.c detection change, and that change is not something Mani finds compelling. I'm therefore planning to drop the DTSI anchor patch in v4 and go with board-file-only port/endpoint nodes. The series would shrink to 3 patches and no DTSI anchors would be added. Could you confirm whether this approach is acceptable before I send v4? [1] https://lore.kernel.org/all/isbrpaztfrgwfcleujrn4w26cshbi2mgn57tbh5bubvsegn6lc@jh3ab6htvd24/ -- Best Regards, Wei Deng