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Wed, 19 Aug 2026 04:23:43 -0700 (PDT) X-Received: by 2002:a05:6a21:6e88:b0:3bf:a543:e7f5 with SMTP id adf61e73a8af0-3cd016b15bdmr8241752637.3.1787138622509; Wed, 19 Aug 2026 04:23:42 -0700 (PDT) Received: from [10.217.222.20] ([202.46.22.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-327bf10d497sm10823348eec.14.2026.08.19.04.23.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 19 Aug 2026 04:23:42 -0700 (PDT) Message-ID: Date: Wed, 19 Aug 2026 16:53:36 +0530 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 v3] dt-bindings: remoteproc: qcom,shikra-pas: Allow bam-dmux subnode To: Krzysztof Kozlowski Cc: Bjorn Andersson , Mathieu Poirier , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Kumar Patro , Komal Bajaj , linux-arm-msm@vger.kernel.org, linux-remoteproc@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Deepak Kumar Singh References: <20260813-shikra-pas-bam-dmux-binding-v3-1-167a3fb50d21@oss.qualcomm.com> <20260814-modest-rose-salmon-7bb60b@quoll> Content-Language: en-US From: Vishnu Santhosh In-Reply-To: <20260814-modest-rose-salmon-7bb60b@quoll> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Authority-Analysis: v=2.4 cv=QedWeMbv c=1 sm=1 tr=0 ts=6a859240 cx=c_pps a=Qgeoaf8Lrialg5Z894R3/Q==:117 a=fChuTYTh2wq5r3m49p7fHw==:17 a=IkcTkHD0fZMA:10 a=Sv0fKeRqtYgA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=VwQbUJbxAAAA:8 a=KKAkSRfTAAAA:8 a=xR3Y2up12dx3HEdxvAEA:9 a=QEXdDO2ut3YA:10 a=x9snwWr2DeNwDh03kgHS:22 a=cvBusfyB2V15izCimMoJ:22 X-Proofpoint-ORIG-GUID: zTbsYD7So-4PwLM6kLfDk9mSN5SCoJNf X-Proofpoint-Spam-Info: AW1haW4tMjYwODE5MDA4OCBTYWx0ZWRfX51N4Z7Qsbjj9 uYIcpUv8ikZ8xUpWxElNKhGIgX7SQV56y+8O3u/UsdGY/ihj/WbSajSvP3iRYChfHd8FxA08yGd 73+c4ywsBM6l5/iXV9MPS8XU6U+B2So= X-Proofpoint-GUID: zTbsYD7So-4PwLM6kLfDk9mSN5SCoJNf X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwODE5MDA4OCBTYWx0ZWRfXybE1Y27h6Iy6 oXOmrr/DE8e3aD8vgnsRdO9WTwSSXDekMMVD/+JXL2zvZh90DFIXJaU5zysBzv1o0tcVgvJZjD7 TzX4nMKz4u6mWHhEJsyUVGDI4pglVzWLTmqvloM6ljiB6dF/HkbQ3Vb6avVWC3UPnDNVzfGErKg vXRmTuJTtfI9hX0+zN4PZXd6eK8lDe+RswFWtGZorGNzpPljDLNPZGYoXQAJdRnSPqhEFRGxkqo HJ0SXNql4enKnjn3KIXDiWnQOl2nM4pojmi0zpy13e3yGrX6aIcW3cZcLutkuWZULAVTIbajelK FGAc/STmSZT8+lLNXcnUsd97X5kMnYR/Ywa+33SB+rERTcMO3g3FG8vnv3iynL6wyFa5fOIPYYJ 8aeLhRGlBdjDfZ7otVM/Z8K/VUQshlmj4j4P5BfhyedpSMGAQWq4lk7sT+LcOYnDzqBXTzySU8S b6gfvl+g4kSubiKRrhw== 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=2026-08-19_03,2026-08-18_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 clxscore=1015 lowpriorityscore=0 adultscore=0 malwarescore=0 impostorscore=0 priorityscore=1501 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2608190088 On 14-08-2026 02:35 pm, Krzysztof Kozlowski wrote: > On Thu, Aug 13, 2026 at 04:55:54PM +0530, Vishnu Santhosh wrote: >> Allow an optional bam-dmux subnode under qcom,shikra-mpss-pas by >> referencing qcom,bam-dmux.yaml. > I still miss the answer why. Last time you said in present tense that > this node exists there, which I objected. The answer to my objections is > to provide proper reason why you are adding this, why you are doing it. > Answer almost never is: repeat what the diff is doing. > > You change something in the bindings because something exists in the > hardware and it was missed in initial submission, and you explain the > impact of that "missing". > > Best regards, > Krzysztof Understood. The reason is not that there is already an in-tree DTS that fails validation today. Rather, it is driven by the intended Shikra MPSS topology. In the earlier Shikra BAM-DMUX DTS posting, the bam-dmux node was initially placed outside the modem remoteproc node. Based on review feedback from Stephan [1], it was requested that bam-dmux be moved under the modem remoteproc node instead. The rationale was that placing the bam-dmux node at the top level makes it impossible for userspace to associate it with a remoteproc instance (in this case, the modem). This binding change therefore exists to describe the intended Shikra MPSS child-node topology. The DTS user of this binding has not been merged yet. Its next revision is being held until a separate discussion regarding an XPU violation is concluded. Our intention is to get the required binding changes merged first so that the DT patch can be sent once those discussions are complete. Please let me know if adding the above context to the commit message is what you are expecting. [1] https://lore.kernel.org/all/airpBYZ2pRdNaE1v@linaro.org/ Thanks, Vishnu >