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Fri, 15 May 2026 04:11:33 -0700 (PDT) X-Received: by 2002:a05:622a:1b90:b0:50d:82db:773e with SMTP id d75a77b69052e-5165a22f61amr46349591cf.47.1778843492847; Fri, 15 May 2026 04:11:32 -0700 (PDT) Received: from [192.168.1.29] ([178.197.219.94]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-48fe4c8344asm92645445e9.1.2026.05.15.04.11.31 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 May 2026 04:11:31 -0700 (PDT) Message-ID: <720715a0-eb4f-4083-a67f-aa380e130d6c@oss.qualcomm.com> Date: Fri, 15 May 2026 13:11:30 +0200 Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 3/3] interconnect: qcom: Make important drivers default To: Konrad Dybcio , Georgi Djakov , Bjorn Andersson , Konrad Dybcio Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org References: <20260428-interconnect-qcom-clean-arm64-v1-0-e6bc3f7832db@oss.qualcomm.com> <20260428-interconnect-qcom-clean-arm64-v1-3-e6bc3f7832db@oss.qualcomm.com> <02578386-a492-4342-95aa-9cfb00c8bacd@oss.qualcomm.com> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzysztof.kozlowski@oss.qualcomm.com; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: pIb_r7TIQzqPgmXkCQzHQguGKC4oc1-J X-Proofpoint-ORIG-GUID: pIb_r7TIQzqPgmXkCQzHQguGKC4oc1-J X-Authority-Analysis: v=2.4 cv=GrhyPE1C c=1 sm=1 tr=0 ts=6a06ff66 cx=c_pps a=WeENfcodrlLV9YRTxbY/uA==:117 a=gOEeR9iKwsj33Yj5oN/cWg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=yrFnZ2jJMywIoLbqsSgA:9 a=QEXdDO2ut3YA:10 a=kacYvNCVWA4VmyqE58fU:22 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDExMyBTYWx0ZWRfX7d4pOQYZqOV/ FFMTlgD99KbiA2/PCCYUjHQEehk5z5CoQ8Hz/8eKh1hmrjOAt07p/mksPlJ9TU0YB/uErpU7ZeG PeC9wZLunYCyMai1TqYmE1LIizK6s3DIibrsm5LgRZx8ZAHQE4WpEYNXo1onEmj9jdMBkQWCrqC HC+oTO2M1kiWxEkWbemxNTjopk1yOXzj1qQTPeEX1Yv0qZzEgNla4cm1kG3lGEz1FwC/voqj/Og KflnlWDfRPLOWAtPLfWMDWKb7QngDX3yJkYO+6FJ/0KxCJmdYEgozJVCJGHx2GO+890P2Q20/fA SSOVyavGgjkn+SXNPWiTPCg1qomCApa6wMCH9xE0Plytn49XB6M1Xw+mvNkOvS2f/HZWL7LXl5/ /u56i2v26GcIV5DDuKZhcJBJVRay7IxsEIhhYAsSVNmqHIsXqe9aoDZ+/VDhukjyCJbgtnyVbYW xOFDirvgBgzdA/enCPQ== 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=2026-05-15_02,2026-05-13_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 clxscore=1015 lowpriorityscore=0 adultscore=0 bulkscore=0 spamscore=0 suspectscore=0 impostorscore=0 phishscore=0 malwarescore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150113 On 15/05/2026 12:54, Konrad Dybcio wrote: > On 4/29/26 5:09 PM, Krzysztof Kozlowski wrote: >> On 29/04/2026 11:23, Konrad Dybcio wrote: >>> On 4/28/26 7:32 PM, Krzysztof Kozlowski wrote: >>>> The interconnect drivers for Qualcomm SoC Network-on-Chip are covering a >>>> basic or fundamental SoC feature: bandwidth management between internal >>>> SoC blocks. SoC can boot without these, but power management or >>>> performance will be affected. These drivers do not represent any sort >>>> of buses visible to the board designers/configurators, thus they should >>>> be always enabled, regardless how SoC is used in the final board. >>>> >>>> Kernel configuration should not ask users choice of drivers when that >>>> choice is obvious and known to the developers that answer should be >>>> 'yes' or 'module'. >>> >>> I'd say let's make them all `default ARCH_QCOM` - all of these drivers >>> are required to boot (minus the OSM_L3 driver which is "only" highly >>> desired, so that your CPU's bus isn't heavily bottlenecked) >> >> So the few of them should not be a module? That's what you want to say? > > I'm saying that if you only want to shoot yourself in the foot and not > in the face, you can make them modules > > But the L3 driver is required to make the caches run at a reasonable > speed, so that they don't bottleneck the rest of the system's mem > bandwidth okidoki, so I will mark all as default built-in as you said, including the OSM_L3, based on your explanation. Best regards, Krzysztof