From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6CF344E4331 for ; Thu, 17 Sep 2026 15:59:59 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=205.220.180.131 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789660801; cv=none; b=GjGiWovA4Hw+8yMH79NRssyuNDpVtE9geIcc0fUz6iMcNA+8sZAOXZf8gTGTZvnRBVXRXNwszcJuksSCaN8xCK0IiM6bQRGT3M7r3ZzOo6fXrw8Wz07CFdRHsIbvI4ll38F0E5QCN6bQlk9KDLYUJ4gNLxp/7s/QiKDR4b3Fi68= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789660801; c=relaxed/simple; bh=tLgpMuWrxTdgXlfCAJ5LB4GG/gQYXb67tbrzvgKcf4g=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=bonSYPU/FRRjDVQ26rzYb3oh5O5CRo2tsQI2fhH14/rBotJcFMEZPHwQevFyhC6yA5v4r6VSG0B/LO0FkUVkXZb+EHhTTGSaJOdgRhDI/YC3qyeYIT+Kyv4Ldvri8TZ7u7kqGVOXEpwOVEcku3BmH6cCMEy2gmn4Tf7972P1shI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com; spf=pass smtp.mailfrom=oss.qualcomm.com; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b=dSLvNvIv; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b=Md0iuP7x; arc=none smtp.client-ip=205.220.180.131 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=oss.qualcomm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=qualcomm.com header.i=@qualcomm.com header.b="dSLvNvIv"; dkim=pass (2048-bit key) header.d=oss.qualcomm.com header.i=@oss.qualcomm.com header.b="Md0iuP7x" Received: from pps.filterd (m0279873.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.11/8.18.1.11) with ESMTP id 68HF9n9j2024427 for ; Thu, 17 Sep 2026 15:59:58 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=qualcomm.com; h= cc:content-type:date:from:in-reply-to:message-id:mime-version :references:subject:to; s=qcppdkim1; bh=x5j5s4nhgiam0hCBqrzwVhfK OSCVilYXlPifgN6u1u0=; b=dSLvNvIvtkEatE5f4mYWs/QhOF7wzzHzrTMINGF+ AVKikYcx0OD88td9JSldjKXhoW7Vs0qRPYgtxT3KquVGkZp9/gppAt3Un+7ZRGYh mQe7qztcQKuXS+tx4y8D7QUxmscr+TiZSTt7dArM7gZ43WZLFs2AepAPsZdlyRbJ eWquYluM0p9VH29lnmQzff13G0pwV0bZxskajQFoPSs8wvC1RLTcqrM9NV5xWH3l R09SvhvsLgvIy3qNg0NW6P6zV0r3FW2zwhpnh7pOt/irmqTW7ecvFE8KDh/auChW PeT/kFTisxHW/BlvwnRx6a33qBo+jtZTKqEjdi6tH7R0tQ== Received: from mail-pl1-f197.google.com (mail-pl1-f197.google.com [209.85.214.197]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 4grjkt07ba-1 (version=TLSv1.3 cipher=TLS_AES_128_GCM_SHA256 bits=128 verify=NOT) for ; Thu, 17 Sep 2026 15:59:58 +0000 (GMT) Received: by mail-pl1-f197.google.com with SMTP id d9443c01a7336-2dd188e16a2so13568965ad.2 for ; Thu, 17 Sep 2026 08:59:58 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oss.qualcomm.com; s=google; t=1789660797; x=1790265597; darn=vger.kernel.org; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:from:to:cc:subject :date:message-id:reply-to:content-type; bh=x5j5s4nhgiam0hCBqrzwVhfKOSCVilYXlPifgN6u1u0=; b=Md0iuP7xj6BLRr+Z5b8pEsoUHoZCNP0PCIAnMqSvEVSSF4ESP8gpUe0P8rQOyeZJT/ EQaEIQB/uWDCSWP3CBGXvqPNZ8AAMpwP5HDec/R9kRwhvdnwZYfO26o/9vEh4vKmJ9i7 h48SDrbXty2zhK6+r8cYIYo5UXGKLuwB1y7uxR6pouoYRwSDDa2bnzsl5KtYwcRgn+BN YCFu70MrPQYXDYqzE3Hd4Hf2P5jfeLIt797ETsxqH5jbeaexY97oHX26sYv/CDRbGc8R PudcHTXo4pyNRvcymOptyViO2gd5FsuSdfBpeOUtIhB0cjuJxmGWVF6yAfiL4GK5xzXY 8+zw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20260707; t=1789660797; x=1790265597; h=in-reply-to:content-disposition:content-type:mime-version :references:message-id:subject:cc:to:from:date:x-gm-gg :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to :content-type; bh=x5j5s4nhgiam0hCBqrzwVhfKOSCVilYXlPifgN6u1u0=; b=bCPPCvcIosbBc91DQVAzeTSy9+m/IsdZQFIAj+Aqkrqgz+GqK42cWW49/wrAPgzlzW NJH3PjxEMe8xi3sLsYifTm0xSh7j6CduYykxPf7Fzu+Rm8IKwagWcMILvBZHAAsrH5YX /exRDE/MjN3Dja38s8G31ekQ9/2trMU/8hQfglt/347lxO54YRlqybbKkCPHacYodYqv MwWR4Wn1eoqqDw2+NdcQkA9fW4Vr+e+1rOfYHTCWj0B9Q2e1JJ2oV0otiZen22i6wM+K c6Jcjjh08FxTXNRtR14W7rPVxdIl3KUN/3iP8MWW/TJ1NzqYK9tvxAz43DTTa/U0bgcs Io4A== X-Forwarded-Encrypted: i=1; AKwUvBxkE1+kyvxzgS99BwWNDtI432G3sETBd60gNbj65OSaAD/MpiNv2U7G3fgJ8KmLvF9QTZoKZ6g=@vger.kernel.org X-Gm-Message-State: AFuF++kdgRwvJxLzGuE2capKmKlpeaI7EVGIOzCrcfBZg6e0N+00l2pm zxaiwyvThJiO3XbhMMYphlO7CmR/Mrout+4vlUEZwzDW7ZwaB9XXWBeLZd1k4J/1j315utDBvDT I9vpCAALY7f94lXl4SWs8gehb5qM0L9mZAXObly3wAyCfHZb3UEYq7dAkoQI= X-Gm-Gg: AYBFou3x6oybQz58aFXrl6WdpU/ByF1Nmz/QcA2xAF4HoAZONv+injArCCc7ZIfyqA6 ARr5O6Dy4CPkw/qjqXsACwKolEH11UGA4ouzhYB2XhY5d9OhuTAQxaWSe0KDJ/reUsbEbdGVIeZ og7xYiYV8dh1n/uPAgr/i8YeO+mgbKGqeeq3qqrV6fuV3Db9um/1fWmMIChJ9xjesLd479BnN6s NTEk9k4Ha158pgZQQuN+72sy7iBmM+tNhgZaLPHpC4sS8Qp9E/wkMvBrHq1/3gOw/kacheoSnMS irlGK1/18iPUeGpkKJNUQ4GCoJbAtO4sfb9WM6NdY3vbmP8PBsInpOimkv77Su5NRDU3lQZ92cJ E3HrG0Q7oUcVcrw== X-Received: by 2002:a17:902:ce81:b0:2db:479a:5127 with SMTP id d9443c01a7336-2dd8e632d7bmr152292765ad.19.1789660797174; Thu, 17 Sep 2026 08:59:57 -0700 (PDT) X-Received: by 2002:a17:902:ce81:b0:2db:479a:5127 with SMTP id d9443c01a7336-2dd8e632d7bmr152292465ad.19.1789660796619; Thu, 17 Sep 2026 08:59:56 -0700 (PDT) Received: from oss.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-2dd89f244c9sm29158325ad.76.2026.09.17.08.59.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2026 08:59:56 -0700 (PDT) Date: Thu, 17 Sep 2026 21:29:49 +0530 From: Mohd Ayaan Anwar To: Maxime Chevallier Cc: Thomas Karpiniec , Coia Prant , netdev@vger.kernel.org, Russell King , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Choong Yong Liang , Bartosz Golaszewski , Russell King , linux-arm-msm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH net 2/2] net: stmmac: qcom-ethqos: advertise supported SerDes interfaces Message-ID: References: <97924d2f-45f9-44d5-b482-97fcbb70abdc@bootlin.com> <3bdf2ecc-9dd1-428c-8841-36b1f19916e7@bootlin.com> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <3bdf2ecc-9dd1-428c-8841-36b1f19916e7@bootlin.com> X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE3MDIyNyBTYWx0ZWRfX+98jA/ePMqXc X/5kpq+uH3k4cLsQgqE9Y/58Wzmhx/L8oxK8IQYntMkooKfeCZsyDqH4NqPPqj5bPZPeTv2bp9Y J5W9TlpD0WkqTxaB1QFXcsv+knsSVUtYHWi1RWr0ndUQhWTRo+F1PdEI/P9G7emgsj+padHBoBN 57U3RWl2DN6pwtwiWO7A099SBn/PWXuWnXWTvcFQzmWEUTE4tUUemxGJ/aQEcOvLnI+bmOJqVXN 21/bv5y6jdHnu3NY3qseTxE1SUgiQ1J3FWhPtx2K+eqOKq0yg6hJczHj+LVGdHpKKOmALXNzV0Z ONKocf6lYK4yL6z4Lg2qT80MV1CMFeJH0RyHThvVn6ZGtDI8l1ooZ/kYQGXyGSwonEC3yTFB6jU T0w3wSw8GgsrH6DDIPoikAw8oo0Q8vSDqpXBt0z6KZhERhY8wptgp/Xmy7CRJe8aN0DEVwfZrMv yagA/JX8Orv+wtmFtUg== X-Proofpoint-GUID: iWO_eWzzA4ymsFs9JixxLL4bRzV4kpwi X-Proofpoint-ORIG-GUID: iWO_eWzzA4ymsFs9JixxLL4bRzV4kpwi X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE3MDIyNyBTYWx0ZWRfXxVN/6dk6LqFx UktCc7uc//foYWmNe5Cf3wq7HxtvWo/MkEhcEcz4voPXZT8P2O1rZilSc5pZGK9QjffJzINadLx Tc1Ur7Pk4HYJTR2ZBbqyRa6gb0HcENI= X-Authority-Analysis: v=2.4 cv=Y/VtIReN c=1 sm=1 tr=0 ts=6aac0e7e cx=c_pps a=cmESyDAEBpBGqyK7t0alAg==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=kj9zAlcOel0A:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=aHOOhSd_e6fbb9z57_EA:9 a=CjuIK1q_8ugA:10 a=1OuFwYUASf3TG4hYMiVC:22 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=2026-09-17_03,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 malwarescore=0 suspectscore=0 spamscore=0 adultscore=0 phishscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609170227 On Thu, Sep 17, 2026 at 07:36:42AM +0200, Maxime Chevallier wrote: > On 9/17/26 06:29, Thomas Karpiniec wrote: > > This POC did show that STMMAC_FLAG_SERDES_SUPPORTS_2500M enabled phylink to configure the integrated PCS for 2500BASE-X and a 2.5 Gbps link came up with no apparent issues. > > Maybe the blind spot is inband aneg. Mohd, you were quite involved in > this, do you remember where we stand on that front ? > That sounds about right. Let me go through the older emails and the logs I had captured at the time to jog my memory. Thomas, it would be useful to know if switching between 1G and 2.5G causes any PCS instability. I remember that particular test case causing a lot of SerDes link flapping. Note that I was testing the QCS9100 board which has the AQR115C PHY (and due to its rate matching capabilities, phylink presents all speeds by default, unlike QCA8081). In parallel, I will try to test out boards with both of these PHYs as well. Ayaan