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Wed, 15 Jul 2026 04:11:21 -0700 (PDT) X-Received: by 2002:a05:620a:440e:b0:926:e8e6:3c28 with SMTP id af79cd13be357-92ef2cb409bmr1181434985a.7.1784113881036; Wed, 15 Jul 2026 04:11:21 -0700 (PDT) Received: from [192.168.120.193] ([178.235.128.140]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-c16871b3dfasm6877666b.28.2026.07.15.04.11.18 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 15 Jul 2026 04:11:19 -0700 (PDT) Message-ID: <973c1b29-091b-4cad-a066-4f0bdee2750a@oss.qualcomm.com> Date: Wed, 15 Jul 2026 13:11:17 +0200 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 2/7] irqchip/irq-qcom-mpm: Register MPM under CPU cluster power domain To: Stephan Gerhold Cc: Sneh Mankad , Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thomas Gleixner , Shawn Guo , Marc Zyngier , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <20260713-b4-shikra_lpm_addition-v1-0-3d858df2cbbf@oss.qualcomm.com> <20260713-b4-shikra_lpm_addition-v1-2-3d858df2cbbf@oss.qualcomm.com> <7c8178ec-8bab-4427-8faa-5b28cb76a5ad@oss.qualcomm.com> <401ee2b2-1d82-40b0-95aa-005840a5078f@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-Info: AW1haW4tMjYwNzE1MDEwOSBTYWx0ZWRfX5SmDBhWQ9uWj 8owtebeWxu3tJJa1vG///nhbC+JVBxayUQNxu7+23pEHkTQibEaymVoZhtIjz3Z7Qhg8pyghwxF 3ReNb11bk0yy4VJulwDuPyukprj512w= X-Authority-Analysis: v=2.4 cv=cuGrVV4i c=1 sm=1 tr=0 ts=6a576ada cx=c_pps a=50t2pK5VMbmlHzFWWp8p/g==:117 a=PRfkaYvzSr8QmIIGAkY2Sg==:17 a=IkcTkHD0fZMA:10 a=RAioF0-LDSMA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=4pV_bLEqcG6om8-7b5EA:9 a=QEXdDO2ut3YA:10 a=IoWCM6iH3mJn3m4BftBB:22 X-Proofpoint-ORIG-GUID: DkznPeBsyq3v7Q5Z-TNfWffSQSwXAcDb X-Proofpoint-GUID: DkznPeBsyq3v7Q5Z-TNfWffSQSwXAcDb X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNzE1MDEwOSBTYWx0ZWRfX4+vS3CzWLTQz 5/4qEQsO2Ys4oZ1xu4Vb2wY87yQApDu2wgTLTlLN9Lr0C+4nPYWg8ygV5ml3SGyf+msTG4ZPMfO MoWf3uyuliQCfcfW5vjxtYUBuWdwZ2gf0ZXu+p6usHejPekYkl6bSUIfyQmgZq7oplnw37IwoXV XPe3iEw+lwsd8mzNHvk6DQeiM/G3ANQ0xRIBDUq9kdbgpxxHuqrokqaA+AJerh26UW155z4Ovvy 9Wp7qHspieABCFyt1SYw1JdOjR4oC3mQWeDLMbkHz+2Kyd2WJE9puJwR3yEeFzp2Ue3f/vEBPhr GqS97IlKQGjJJEjFMsdRZcqV7kXWoX346bjMkP0Yx6V3po4hCziVZE3Ru2fbo6DKp+NTxP97qyG wj2mL6w6bbFFoqHJDbYUc/Gwfp/SyxNeYW6AodQe5mqDEdTPztXA4WqIAepJxxpCcFPp4Adikvz mKo4VstVQLjTECEtHxw== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-07-15_02,2026-07-15_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 adultscore=0 bulkscore=0 lowpriorityscore=0 malwarescore=0 phishscore=0 priorityscore=1501 spamscore=0 suspectscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2606150000 definitions=main-2607150109 On 7/15/26 12:49 PM, Stephan Gerhold wrote: > On Wed, Jul 15, 2026 at 12:45:48PM +0200, Konrad Dybcio wrote: >> On 7/15/26 12:34 PM, Stephan Gerhold wrote: >>> On Wed, Jul 15, 2026 at 11:46:58AM +0200, Konrad Dybcio wrote: >>>> On 7/13/26 12:25 PM, Sneh Mankad wrote: >>>>> MPM irqchip needs to notify RPM (Resource Power Manager) processor to read >>>>> the latest wake up capable interrupts when the CPU cluster is entering the >>>>> deepest idle state. This is done by sending IPC interrupt to RPM and is >>>>> implemented as .power_off() callback by registering MPM as parent power >>>>> domain to CPU cluster. [...] >>> We probably do need some fallback for the old sm6375/agatii DTBs though. >> >> The sleep logic doesn't really matter without the platforms hitting a >> specific power state anyway, so I'm not sure we actually have to (i.e. >> the regressed path can't be exercised today anyway) >> > > So are you saying the MPM is currently assigned as parent to some dummy > idle states in sm6375/agatti.dtsi, which aren't actually triggering APSS > shutdown? Or is it just irrelevant because other power resources keep > the whole platform on (RPM clocks etc)? > > If it's the latter, the question is if we might end up fixing that some > day without further device tree changes. :') I wouldn't call them dummy, but I'm not 100% sure they can trigger cxpc entry.. The latter most likely also applies, although that's based on a guess Konrad