[{"id":3687664,"web_url":"http://patchwork.ozlabs.org/comment/3687664/","msgid":"","list_archive_url":null,"date":"2026-05-07T09:10:39","subject":"Re: [RFC V6 0/8] arm_scmi: vendors: Qualcomm Generic Vendor\n Extensions","submitter":{"id":90483,"url":"http://patchwork.ozlabs.org/api/people/90483/","name":"Dmitry Baryshkov","email":"dmitry.baryshkov@oss.qualcomm.com"},"content":"On Thu, May 07, 2026 at 11:52:29AM +0530, Sibi Sankar wrote:\n> The QCOM SCMI vendor protocol provides a generic way of exposing a number of\n> Qualcomm SoC specific features (like memory bus scaling) through a mixture of\n> pre-determined algorithm strings and param_id pairs hosted on the SCMI\n> controller. On Qualcomm Glymur and Hamoa SoCs, the memlat governor and the\n> mechanism to control the various caches and ram is hosted on the CPU Control\n> Processor (CPUCP) and the method to tweak and start the governor is exposed\n> through the QCOM SCMI Generic Extension Protocol.\n\n\nCould you please clarify, does this apply to the common commercial\nGlymur and Hamoa laptops?","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=aaj2kPf7;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=eaayxXqs;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=172.234.253.10; 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On Qualcomm Glymur and Hamoa SoCs, the memlat governor and the\n>> mechanism to control the various caches and ram is hosted on the CPU Control\n>> Processor (CPUCP) and the method to tweak and start the governor is exposed\n>> through the QCOM SCMI Generic Extension Protocol.\n>\n> Could you please clarify, does this apply to the common commercial\n> Glymur and Hamoa laptops?\n\nYes, they do apply to common commercial Glymur/Hamoa Laptops\nas is. This is the same solution used on the windows side of things\nas well. There can be certain cases like Johan has reported earlier\nwhere certain oems are stuck with on older version of CPUCP\nwhich requires a the memlat string to be sent out in lower case\nwe should be able to handle those as well with overriding those\nby using driver data and specific compatibles.\n\n-Sibi\n\n>","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=W2kgtRor;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=RLw16P2+;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c0a:e001:db::12fc:5321; helo=sea.lore.kernel.org;\n envelope-from=linux-tegra+bounces-14283-incoming=patchwork.ozlabs.org@vger.kernel.org;\n receiver=patchwork.ozlabs.org)","smtp.subspace.kernel.org;\n\tdkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com\n header.b=\"W2kgtRor\";\n\tdkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.b=\"RLw16P2+\"","smtp.subspace.kernel.org;\n arc=none smtp.client-ip=205.220.180.131","smtp.subspace.kernel.org;\n dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com","smtp.subspace.kernel.org;\n spf=pass smtp.mailfrom=oss.qualcomm.com"],"Received":["from sea.lore.kernel.org (sea.lore.kernel.org\n [IPv6:2600:3c0a:e001:db::12fc:5321])\n\t(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)\n\t key-exchange x25519 server-signature ECDSA (secp384r1) server-digest SHA384)\n\t(No client certificate requested)\n\tby legolas.ozlabs.org (Postfix) with ESMTPS id 4gB7DD4D7vz1yKd\n\tfor ; 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charset=UTF-8; format=flowed","Content-Transfer-Encoding":"7bit","X-Authority-Analysis":"v=2.4 cv=TJB1jVla c=1 sm=1 tr=0 ts=69fc6246 cx=c_pps\n a=vVfyC5vLCtgYJKYeQD43oA==:117 a=xqWC_Br6kY4A:10 a=IkcTkHD0fZMA:10\n a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22\n a=u7WPNUs3qKkmUXheDGA7:22 a=3WHJM1ZQz_JShphwDgj5:22 a=nip31g8rMu7ECPMDnyQA:9\n a=QEXdDO2ut3YA:10 a=rl5im9kqc5Lf4LNbBjHf:22","X-Proofpoint-Spam-Details-Enc":"AW1haW4tMjYwNTA3MDA5OCBTYWx0ZWRfXxh/DXo42hIEB\n yKd/wMtowRllbN+Qaey65cD1lbcI6L0p38TzLQFHvD+f6RtgSbIjCwZ0oKDYdIg8ZKhpvSWg+2C\n SDpBa3sTrVn/eEz4Lg5UHdAOyV543uCCQ9yAJsxmlHdan24qJJ6rhjo+VaZODwMXK3lX+1yOdBj\n B/+Qqj26OH+9mbNbgyz/s2VprnMehiMMS6o8p4NdFE8COTyGIX+OeXumW3+G9SDIUjnJTLtvPOj\n 4/GmgsuGMBtlUf1WOS4m/l95cfyDEkck6TxgOxIGhICQg6fX5WXHU0+MJ9bLW8mHjt2yNxyYHIA\n IPkJYMFxWyiHThnAhH8TROmYhD0pWajvwFr63eTYFhoaEMR6ZgFShz8EYJ63zZFl+zrVDovQsge\n L3+p0VvUMiIneKiwtoHtSy5l8DnRLoaAJLlrOQSz6TPg3Wrdm4gTVUGunf63jha2NsnnVbOhn+/\n OEjybKKMejJkQEpXixg==","X-Proofpoint-GUID":"En9mU6J0tVHBPh7Et67uiMWhEkcnJasM","X-Proofpoint-ORIG-GUID":"En9mU6J0tVHBPh7Et67uiMWhEkcnJasM","X-Proofpoint-Virus-Version":"vendor=baseguard\n engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49\n definitions=2026-05-06_02,2026-05-06_01,2025-10-01_01","X-Proofpoint-Spam-Details":"rule=outbound_notspam policy=outbound score=0\n clxscore=1015 lowpriorityscore=0 malwarescore=0 impostorscore=0 bulkscore=0\n phishscore=0 priorityscore=1501 adultscore=0 spamscore=0 suspectscore=0\n classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0\n reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605070098"}},{"id":3687722,"web_url":"http://patchwork.ozlabs.org/comment/3687722/","msgid":"","list_archive_url":null,"date":"2026-05-07T11:10:48","subject":"Re: [RFC V6 0/8] arm_scmi: vendors: Qualcomm Generic Vendor\n Extensions","submitter":{"id":90483,"url":"http://patchwork.ozlabs.org/api/people/90483/","name":"Dmitry Baryshkov","email":"dmitry.baryshkov@oss.qualcomm.com"},"content":"On Thu, May 07, 2026 at 03:28:21PM +0530, Sibi Sankar wrote:\n> \n> On 5/7/2026 2:40 PM, Dmitry Baryshkov wrote:\n> > On Thu, May 07, 2026 at 11:52:29AM +0530, Sibi Sankar wrote:\n> > > The QCOM SCMI vendor protocol provides a generic way of exposing a number of\n> > > Qualcomm SoC specific features (like memory bus scaling) through a mixture of\n> > > pre-determined algorithm strings and param_id pairs hosted on the SCMI\n> > > controller. On Qualcomm Glymur and Hamoa SoCs, the memlat governor and the\n> > > mechanism to control the various caches and ram is hosted on the CPU Control\n> > > Processor (CPUCP) and the method to tweak and start the governor is exposed\n> > > through the QCOM SCMI Generic Extension Protocol.\n> > \n> > Could you please clarify, does this apply to the common commercial\n> > Glymur and Hamoa laptops?\n> \n> Yes, they do apply to common commercial Glymur/Hamoa Laptops\n> as is. This is the same solution used on the windows side of things\n> as well. There can be certain cases like Johan has reported earlier\n> where certain oems are stuck with on older version of CPUCP\n> which requires a the memlat string to be sent out in lower case\n> we should be able to handle those as well with overriding those\n> by using driver data and specific compatibles.\n\nAck, thanks for the confirmation.","headers":{"Return-Path":"\n ","X-Original-To":["incoming@patchwork.ozlabs.org","linux-tegra@vger.kernel.org"],"Delivered-To":"patchwork-incoming@legolas.ozlabs.org","Authentication-Results":["legolas.ozlabs.org;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=qualcomm.com header.i=@qualcomm.com header.a=rsa-sha256\n header.s=qcppdkim1 header.b=O8jZkoVA;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com\n header.a=rsa-sha256 header.s=google header.b=g20X+xxt;\n\tdkim-atps=neutral","legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=vger.kernel.org\n (client-ip=2600:3c04:e001:36c::12fc:5321; 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