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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-bd4f4eac613sm206295666b.56.2026.05.15.04.12.03 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 15 May 2026 04:12:04 -0700 (PDT) Message-ID: <62f6c5fd-c952-4bcf-9125-c5fe92fca1dc@oss.qualcomm.com> Date: Fri, 15 May 2026 13:12:02 +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 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> <02578386-a492-4342-95aa-9cfb00c8bacd@oss.qualcomm.com> <720715a0-eb4f-4083-a67f-aa380e130d6c@oss.qualcomm.com> Content-Language: en-US From: Konrad Dybcio In-Reply-To: <720715a0-eb4f-4083-a67f-aa380e130d6c@oss.qualcomm.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTE1MDExMyBTYWx0ZWRfX+jI5r/mbmV2s 9Y8ELE3pkgEBfjT00LZvSRi3BZivCWY0csSkMPfrmR0LPDdyqVHUSDVCKsfhUHaqI44pEbZKDtn QNjPuQC+07P3ykeCf/V22B/NwgWZYdZHvW8pjLGpV6JqP8pSzdCmFoqHm9FhI7WXZ27G6SreZiD 7r26VF2EPwo2N/wIGyM9fXxw4IfM1OI+dbKonF76Rb1+aD6YGn4EjahTaCav6JLf42Vx768up5n 3UCSvK9PcUJ2NUWldyRqXUcmDr3wktrjQOIX4tyTyq5JGz0MeRauG/wVLEuDk814Fz2cSRjW/dN burySN8cz+jp7YXLnR7tvvPAYQUmR4s0S/1DX6WgfmPBlLdlQ7jPbUNdoo+ZCpVmNfiUd2+yvNV X04UUsKCaflnJ5EHgj1jE558ZigJMFJ1uA2HRYtYgMplWbBjsG9x5yUos5nisQVzG27X4SufZbs wCootctR5wquIIYM3dQ== X-Authority-Analysis: v=2.4 cv=cZXiaHDM c=1 sm=1 tr=0 ts=6a06ff86 cx=c_pps a=DUEm7b3gzWu7BqY5nP7+9g==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=yx91gb_oNiZeI1HMLzn7:22 a=uUpgVYKiIJP92WW26QwA:9 a=QEXdDO2ut3YA:10 a=-aSRE8QhW-JAV6biHavz:22 X-Proofpoint-GUID: XMHUPzJgXg0sMAKozXWupJEx1-OaiJCa X-Proofpoint-ORIG-GUID: XMHUPzJgXg0sMAKozXWupJEx1-OaiJCa 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 lowpriorityscore=0 spamscore=0 phishscore=0 suspectscore=0 adultscore=0 bulkscore=0 impostorscore=0 malwarescore=0 clxscore=1015 priorityscore=1501 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2605130000 definitions=main-2605150113 On 5/15/26 1:11 PM, Krzysztof Kozlowski wrote: > 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. Thanks! Konrad