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[78.88.45.245]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-b9b133e0796sm56053666b.16.2026.03.25.03.52.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 25 Mar 2026 03:52:41 -0700 (PDT) Message-ID: Date: Wed, 25 Mar 2026 11:52:38 +0100 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 v2 6/9] interconnect: qcom: let platforms declare their bugginess To: Luca Weiss , Dmitry Baryshkov , Georgi Djakov , Konrad Dybcio , Bjorn Andersson , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Brian Masney Cc: linux-arm-msm@vger.kernel.org, linux-pm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Brian Masney References: <20260324-msm8974-icc-v2-0-527280043ad8@oss.qualcomm.com> <20260324-msm8974-icc-v2-6-527280043ad8@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: AW1haW4tMjYwMzI1MDA3NyBTYWx0ZWRfXwKnOq51GfhTO 5xsZ50RTFyG+AwFNpiQz0AeQ2uLd3R2hgMCdACn4CXTfL1mk+KI8gRICWEBnyDe4TxmbY2/Vhd3 3v1RQEwjSn3bkDJB9zePuOVUeApy7d3+4eGJ1mV5KWYayFCPvyWVSpenDj4Akn4kml82W3jWqYB zxKWbbmxfkwiH/z/EPhZrn6zDGXIytBBT7AYbr6tejNFep4DrZnsrZjOLl9xQYtfhPWx6sjmukm kOAyIkaGGSfgQP+WfTRj0lk+j+Gk9slyx2JY/sKlpqj9utzkcErT9812jr9En7tWhuRZrJ+pMGR TqSgDv6+LpoTzXhfAFW0Pk/FcmmrBvFqTQddakN8AZBc2zPK6lNzhI/t8mj3Oq8KKsiWDGJP1sq 19Bj/VJa7OUGiy0J9csDmIOO8C40VWp9I0VdHei9GNOnyZXPn/MQm/u6b9aYfTUeFfiT48S9fIc VeupFzmj7fcxnpMeBtw== X-Proofpoint-GUID: zDlUivGun1TBYlT1S4eakSOXcIdrMsGR X-Proofpoint-ORIG-GUID: zDlUivGun1TBYlT1S4eakSOXcIdrMsGR X-Authority-Analysis: v=2.4 cv=AKSYvs3t c=1 sm=1 tr=0 ts=69c3be7b cx=c_pps a=oc9J++0uMp73DTRD5QyR2A==:117 a=FpWmc02/iXfjRdCD7H54yg==:17 a=IkcTkHD0fZMA:10 a=Yq5XynenixoA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_K5XuSEh1TEqbUxoQ0s3:22 a=Oh2cFVv5AAAA:8 a=m7pxcdcc42vr7exHiogA:9 a=QEXdDO2ut3YA:10 a=iYH6xdkBrDN1Jqds4HTS:22 a=7KeoIwV6GZqOttXkcoxL:22 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=2026-03-25_03,2026-03-24_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 adultscore=0 lowpriorityscore=0 malwarescore=0 suspectscore=0 bulkscore=0 clxscore=1015 impostorscore=0 spamscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2603050001 definitions=main-2603250077 On 3/24/26 1:14 PM, Luca Weiss wrote: > On Tue Mar 24, 2026 at 1:10 AM CET, Dmitry Baryshkov wrote: >> On MSM8974 programming some of the RPM resources results in the >> "resource does not exist" messages from the firmware. This occurs even >> with the downstream bus driver, which happily ignores the errors. My >> assumption is that these resources existed in the earlier firmware >> revisions but were later switched to be programmed differently (for the >> later platforms corresponding nodes use qos.ap_owned, which prevents >> those resources from being programmed. >> >> In preparation for conversion of the MSM8974 driver (which doesn't have >> QoS code yet) to the main icc-rpm set of helpers, let the driver declare >> that those -ENXIO errors must be ignored (for now). Later, when the QoS >> programming is sorted out (and more interconnects are added to the DT), >> this quirk might be removed. > > For reference, these are the errors I see on fairphone-fp2 > > [ 5.534806] qcom_icc_rpm_smd_send mas 8 error -6 > [ 5.535010] qcom_icc_rpm_smd_send mas 8 error -6 > [ 5.535218] qcom_icc_rpm_smd_send slv 16 error -6 > [ 5.535445] qcom_icc_rpm_smd_send slv 16 error -6 I only checked these two, but 8994 (basically largely reused design thought) sets them as AP owned intentionally https://android.googlesource.com/kernel/msm/+/android-msm-angler-3.10-nougat/arch/arm/boot/dts/qcom/msm8994-bus.dtsi so I suppose the fix is to simply denote all of them as such and go on with our life! Konrad