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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-bd4f4c23feasm212857866b.14.2026.05.15.03.54.37 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 May 2026 03:54:38 -0700 (PDT) Message-ID: <02578386-a492-4342-95aa-9cfb00c8bacd@oss.qualcomm.com> Date: Fri, 15 May 2026 12:54:37 +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: Krzysztof Kozlowski , 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> 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: AW1haW4tMjYwNTE1MDExMCBTYWx0ZWRfX6fxKEkAlMo2u z642DzNkO2vXnCtGZo2pDYPYF7P4MBriPiFPFTwW1uV+HcKLLxzIcQXghDMDnpECOYM3Dd48t8D o/GlPwbJ4Xcgn3rpSDVWopz8aUvc7rl25VuXipZlCV/csId8YvbALMf3zVXgt5d0YE54Z/z0Yom yoPCoqgQaGYm1QuMtDoVO6KbAN8NL5yuY4is9CS2h0yfxKw5mgGX2Qpswy6sw14d7Ej3/TbWMjn GLYJdr8LFkbXGVgR8ClfdAi6EdFnc3tOY6ImJY3ge/LHNd/H5a6HmAw1aSmQS7dPEAbgk6LAbCc F5KuQ4biwqP0AgkdKx+VhpKcyu24fWgP9mwvePFJNJVBK2OvudH4o29Oo2gRx4fgiHvO/9eh1Wv LdR4zzQSJ6ZU9ApD8hJdGhg0uIs7be1EbhSDoOlW6QOUTaDDvpjBpLZjHgZ3rM/2XnY4ftimfyk QddALJ8UiEXlEfbj/rA== X-Authority-Analysis: v=2.4 cv=Md5cfZ/f c=1 sm=1 tr=0 ts=6a06fb71 cx=c_pps a=ULNsgckmlI/WJG3HAyAuOQ==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=eoimf2acIAo5FJnRuUoq:22 a=HltSbr2RFzsJciUvgNYA:9 a=QEXdDO2ut3YA:10 a=1WsBpfsz9X-RYQiigVTh:22 X-Proofpoint-GUID: 83M-N7ZNv2aIX6BR_JVUuf49odPG2Up6 X-Proofpoint-ORIG-GUID: 83M-N7ZNv2aIX6BR_JVUuf49odPG2Up6 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 suspectscore=0 lowpriorityscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 adultscore=0 phishscore=0 spamscore=0 clxscore=1015 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150110 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 Konrad