From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4F2FBC25B75 for ; Mon, 3 Jun 2024 11:16:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:From:References:CC:To: Subject:MIME-Version:Date:Message-ID:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=PQtvXCBFrz4CL5Dq7IH0Fgm/fdZP7GapcQ3dDEW3B00=; b=C9peaWP3tmdF43 yRfCDeyYmeDj2mcpllK9XOFnnapHgxYOJgmgss8nbUrNGphuDgX7fJY6KOJHL9AkcUVDNASlMJ/qm lqDZNu5u++EthC3WEfV2Q+tUUHH9Q4akx1TKrXvlTw2xgwNyWqmC3NXupVySR2UTZuPASe8PCEA4d lMECG5ZuybGtQRLOSwMP9+q6H9+pfv/qTQSOQYWt/Gkguaza1JD6OCtYOQrqyMo3i1wQhHdMTL8TK AAHy5yuOnUqe90TCZCEF6SuBlty3KtSMxcxt4A+mcgySX81NRrbjo9xtPqK4FHfRx/Ech/ygjgXyS G/dGSqJMQjvIvlYzRPYg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sE5fa-0000000GUOf-3Z6E; Mon, 03 Jun 2024 11:16:06 +0000 Received: from mx0a-0031df01.pphosted.com ([205.220.168.131]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sE5fV-0000000GUKK-2yA3 for linux-arm-kernel@lists.infradead.org; Mon, 03 Jun 2024 11:16:04 +0000 Received: from pps.filterd (m0279864.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 452NubkQ017720; Mon, 3 Jun 2024 11:15:42 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h= cc:content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=qcppdkim1; bh= 4dBJ7CRFnEtRJnVMM/5nRbR4DBCRRfHzth9KUplaXFw=; b=OR15NPJ85m8dw4nX CxLgZZ1jmE2iD13o2dHk+AV40nv2xuct3SPRFyoJoJhLqjKsbPKG6kJT1CFh4NFO 2gH+bqJ7foyqb7+TURaiK1oKt5sw1SP5Vhn4/TcrJ4Wg1R+JwvFg3fnJwHb7bndy Rr0p5HwYZAaMisq9pyQZ3wJOKROdd0cFFMfq24HZD99d0g9+PiVHcMlpNZ7I1k59 PTLDC1blK8AHieZJmYmmZAVvf5C7PXpxMyrfh5Z6QJ59luFi1hINo9JAHwPzGyQD UuhvBQ7eZKqu33zH+kNzYGeSYXPdUPfCkg7pJQqdZGpRkAp0DVSPUM+LG5yRjylQ +IRBjA== Received: from nalasppmta03.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3yfw59kjx4-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 03 Jun 2024 11:15:42 +0000 (GMT) Received: from nalasex01b.na.qualcomm.com (nalasex01b.na.qualcomm.com [10.47.209.197]) by NALASPPMTA03.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 453BFfv5000885 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 3 Jun 2024 11:15:41 GMT Received: from [10.217.90.34] (10.80.80.8) by nalasex01b.na.qualcomm.com (10.47.209.197) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1544.9; Mon, 3 Jun 2024 04:15:33 -0700 Message-ID: <0f0df372-29b5-4daf-8e54-4157e8ab1a98@quicinc.com> Date: Mon, 3 Jun 2024 16:45:30 +0530 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next] net: stmmac: dwmac-qcom-ethqos: Add support for 2.5G SGMII To: "Russell King (Oracle)" , Andrew Lunn CC: Andrew Halaney , Vinod Koul , Bhupesh Sharma , Alexandre Torgue , Jose Abreu , "David S. Miller" , Eric Dumazet , "Jakub Kicinski" , Paolo Abeni , Maxime Coquelin , , , , , , References: <20231218071118.21879-1-quic_snehshah@quicinc.com> <4zbf5fmijxnajk7kygcjrcusf6tdnuzsqqboh23nr6f3rb3c4g@qkfofhq7jmv6> <8b80ab09-8444-4c3d-83b0-c7dbf5e58658@quicinc.com> <8f94489d-5f0e-4166-a14e-4959098a5c80@quicinc.com> <67553944-5d3f-4641-a719-da84554c0a9f@lunn.ch> Content-Language: en-US From: Sneh Shah In-Reply-To: X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) To nalasex01b.na.qualcomm.com (10.47.209.197) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: eljy9ZgYrskT4Ir30jUQ98wP83GwYNmB X-Proofpoint-ORIG-GUID: eljy9ZgYrskT4Ir30jUQ98wP83GwYNmB X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.650,FMLib:17.12.28.16 definitions=2024-06-03_07,2024-05-30_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxscore=0 malwarescore=0 spamscore=0 lowpriorityscore=0 priorityscore=1501 suspectscore=0 adultscore=0 clxscore=1011 mlxlogscore=978 bulkscore=0 phishscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2405170001 definitions=main-2406030094 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240603_041601_835158_AB979F3E X-CRM114-Status: GOOD ( 14.89 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/30/2024 1:43 AM, Russell King (Oracle) wrote: > On Wed, May 29, 2024 at 04:28:16PM +0200, Andrew Lunn wrote: >>> Qualcomm ethernet HW supports 2.5G speed in overclocked SGMII mode. >>> we internally term it as OCSGMII. >> >> So it still does SGMII inband signalling? Not 2500BaseX signalling? It >> is not actually compatible with 2500BaseX? >> >>> End goal of these patches is to enable SGMII with 2.5G speed support. >>> The patch in these series enabled up SGMII with 2.5 for cases where we >>> don't have external phy. ( mac-to-mac connectivity) >> >> So the other end needs to be an over clocked SGMII MAC, not 2500BaseX? >> >>> The new patch posted extends this for the case when the MAC has an >>> external phy connected. ( hence we are advertising fr 2.5G speed by adding >>> 2500BASEX as supported interface in phylink) >> >> And i assume it does not actually work against a true 2500BaseX >> device, because it is doing SGMII inband signalling? > > I really hope the hardware isn't using any SGMII inband signalling > at 2.5G speeds. Other devices explicitly state that SGMII inband > signalling while operating the elevated 2.5G speed is *not* supported! Do we mean SGMII autoneg by SGMII inband signalling? Our hardware doesn't support autoneg for 2.5G mode in SGMII. > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel