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Fri, 25 Sep 2026 01:06:44 -0700 (PDT) X-Received: by 2002:a05:7300:cb84:b0:33e:3f5b:3ffa with SMTP id 5a478bee46e88-3400162060dmr6068747eec.10.1790323603614; Fri, 25 Sep 2026 01:06:43 -0700 (PDT) Received: from [10.152.202.233] ([202.46.23.19]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-34141a4a00dsm4804246eec.1.2026.09.25.01.06.41 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 25 Sep 2026 01:06:43 -0700 (PDT) Message-ID: <70e4a7fa-6595-46da-8465-38906a41a6f3@oss.qualcomm.com> Date: Fri, 25 Sep 2026 13:36:39 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: ath12k: inconsistent regdb for QCN9274 To: Alexander Wilhelm , Jeff Johnson List-Id: Cc: ath12k@lists.infradead.org, linux-firmware@kernel.org References: Content-Language: en-US From: Thirusenthil Kumaran J In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Proofpoint-GUID: ae00ALIPRw8NTQwJ3cZGeVbfQpVf4nbL X-Proofpoint-ORIG-GUID: ae00ALIPRw8NTQwJ3cZGeVbfQpVf4nbL X-Authority-Analysis: v=2.4 cv=aLBlOr9m c=1 sm=1 tr=0 ts=6ab62b95 cx=c_pps a=wEP8DlPgTf/vqF+yE6f9lg==:117 a=j4ogTh8yFefVWWEFDRgCtg==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=_glEPmIy2e8OvE2BGh3C:22 a=0H79OdPNVVR_eeETAwQA:9 a=QEXdDO2ut3YA:10 a=bBxd6f-gb0O0v-kibOvt:22 X-Proofpoint-Spam-Info: AW1haW4tMjYwOTI1MDAzMiBTYWx0ZWRfX6ezo+WKYCgyF Ct3dMOm1htVvSkI8wLQu4vXQCcmm0L1OBTkoa1Ze9EbED5DWW0dRcL3XuhMnroS2qz+M/S3D/Xe f7hePOwl2OKaTcbtlWpG3SoOsnG7PTg= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTI1MDAzMiBTYWx0ZWRfXyX8lj0MMYXAA FFWL2o7g60B2s5gGjIcEBpt2ivpn216Z15ujwczYIsaeIpKj/vNaMZxpINFd3CE/emKouhZrOat 8kHy14CzygK08KomkMcgIcoerRnohT8YoTt2OIrdl1rDatwodJEbOAv7QZWZ7Xzb4GG8l+b9hyU RCLCuUTy+yxqEePOPXDrilz02PT4KUHtdXpZIQpe55w8au16sUcRt2sjEPATCsdlQlIPViGsXRE /KHa0n6H7YbfJ1rzoURaNbRj5I9EknQZuGIv7XSt4ALVkWvpCTxpZxon0A+9ZqTNfqQtSl9AXof mnWO1IUjIcc4lqnAD6b3CUYqJ1YYUJmQgB4J3SxQCbKquwLEbW6Mzb9r32NiSxwuAWqnKGv7yn4 eWFverWFzot9GeqoJ/9hSt5ZDafMfYoMU/subhDWQIB1k/GvMDfroCv8AYraQL9xxUbxFKZ/Suf nuQRXdOUA6do/yX+kog== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1176,Hydra:6.1.134,FMLib:17.12.100.49 definitions=2026-09-25_02,2026-09-21_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 suspectscore=0 malwarescore=0 priorityscore=1501 clxscore=1011 phishscore=0 adultscore=0 impostorscore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609250032 On 9/8/2026 12:16 PM, Alexander Wilhelm wrote: > > Hello Developers, > > I am using QCN9274 chipsets with the `ath12k` driver on my devices. As far as I > can tell, the driver uses the regulatory database from the `board-2.bin` file. > However, some country definitions do not appear to be fully implemented, as the > values differ from those in Linux's standard `wireless-regdb` repository. I even > downloaded the latest `linux-firmware-20260810.tar.xz` and do not see any > related changes there. > > For example, when switching to DE, I see the following values: > * Channels 52-64: 23 dBm; I would expect 20.0 dBm > * Channels 100-140: 30.0 dBm; I would expect 26.0 dBm > * Channels 144-173: (disabled); I would expect 13.0 dBm > > US also appears to be inconsistent: > * Channels 36-48: 30.0 dBm; I would expect 23.0 dBm > * Channels 169-173: (disabled); I would expect 30.0 dBm > > I am aware that `wireless-regdb` is intentionally restrictive in some cases. For > example, there are rules where 26.0 dBm is used instead of 30.0 dBm because it > is implicitly assumed that TPC is not supported. Therefore, some differences may > be expected. > > However, the values above still appear to be incorrect. Could someone at > Qualcomm please investigate this and fix the regulatory information if it is > indeed wrong? If the current behavior is intentional, I would appreciate an > explanation of how these limits are derived, as they do not seem to match either > the `wireless-regdb` entries or the applicable regulatory requirements. Thank > you in advance. > > > Best regards > Alexander Wilhelm > Hi Alexander, Our internal regulatory team is reviewing the source and rationale for these values. We would also like to confirm which BDF was selected on your platform during boot. Could you please share the following details from the affected platform? - The exact platform/board model, or RDP number if applicable which is used with the QCN9274. - The complete dmesg output from the affected boot. In particular, please include the ath12k QMI target-capability messages containing information similar to: chip_id, chip_family, board_id, soc_id, fw_version, These messages are printed from the 'ath12k_qmi_request_target_cap()' function. They will help us identify the chipset, board ID, SoC, and firmware version, and correlate the selected BDF with the regulatory data. For a quick filtered view, you may also run: dmesg | grep -i -E 'ath12k|board|bdf|chip_id|fw_version|fw_build|soc_id' With these details, we can verify whether the reported channels are included in the selected BDF and continue investigating the regulatory limits. Best regards, Thirusenthil