From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from xry111.site (xry111.site [89.208.246.23]) (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 79B8344D012; Wed, 21 Jan 2026 07:11:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=89.208.246.23 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768979494; cv=none; b=CYIH4962v7NOAfziX6EQ/2a8WWQguUmLRLoHvhPvnRwIgvUe/jOW7Y8yMHLk8MlOiglEFQHkFOYvIMasWNaVryIioemoM9cgpBfI8egV89VwT4RS1gKvC3bbcpCoiCgjwXTNOTZRkig5YmyeAxxUPhLWGM6RFReH3nGZ55ZVynw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768979494; c=relaxed/simple; bh=Jo8tWaJanldjLGl3SShn1+DSg7/RvS2MRX+8f0csk1U=; h=Message-ID:Subject:From:To:Cc:Date:In-Reply-To:References: Content-Type:MIME-Version; b=N3+LDmpchRu8HJGSsesT6jTZwko+RKbAfUalL/O3a3u3Zs8iexiWzuXD35gOQVUD8jShBGpZGGVeyMhwNoEod42fV8HhDmOlk/NdDALs0c/4SdFTGisfGZ2bXLrHKd+oXctRqy1CxomUIfWgbyHSb9QvmeNJ3QiAdnax5WdX0iA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site; spf=pass smtp.mailfrom=xry111.site; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b=dlHowCvQ; arc=none smtp.client-ip=89.208.246.23 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=xry111.site Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=xry111.site Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=xry111.site header.i=@xry111.site header.b="dlHowCvQ" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=xry111.site; s=default; t=1768979480; bh=Jo8tWaJanldjLGl3SShn1+DSg7/RvS2MRX+8f0csk1U=; h=Subject:From:To:Cc:Date:In-Reply-To:References:From; b=dlHowCvQe9me/z9JA9scRuBNsqKWsHL3b9syD/UAJy9OXP5YDLotW2yZVjt82voNm aMlpnjnLA3gXzFC4T/pVeTSbsy2FWA74DqG/QP1m+tpJqNgp2WRjnJtxbAhRwn+8/K 1a87UXWgmllDUxKI4KeozaWRoaQYhodNh0+PjK+g= Received: from [IPv6:2409:8a4c:e1d:a410::256] (unknown [IPv6:2409:8a4c:e1d:a410::256]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (prime256v1) server-signature ECDSA (secp384r1) server-digest SHA384) (Client did not present a certificate) (Authenticated sender: xry111@xry111.site) by xry111.site (Postfix) with ESMTPSA id 1873466B43; Wed, 21 Jan 2026 02:11:12 -0500 (EST) Message-ID: Subject: Re: [PATCH RESEND net-next v6 0/3] Add DWMAC glue driver for Motorcomm YT6801 From: Xi Ruoyao To: Yao Zi , Georg Gottleuber , "Russell King (Oracle)" Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, Frank.Sae@motor-comm.com, hkallweit1@gmail.com, vladimir.oltean@nxp.com, wens@csie.org, jszhang@kernel.org, 0x1207@gmail.com, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, jeffbai@aosc.io, kexybiscuit@aosc.io, Christoffer Sandberg Date: Wed, 21 Jan 2026 15:10:56 +0800 In-Reply-To: References: <20260109093445.46791-2-me@ziyao.cc> <176827502141.1659151.5259885987231026081.git-patchwork-notify@kernel.org> <147b700c-cae2-4286-b532-ec408e00b004@tuxedocomputers.com> <24cfefff-1233-4745-8c47-812b502d5d19@tuxedocomputers.com> <1be6caa4-abbd-4f3b-8c63-b637f0f9ed15@tuxedocomputers.com> Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable User-Agent: Evolution 3.58.0 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 On Tue, 2026-01-20 at 11:52 +0000, Yao Zi wrote: > > > > > > > I tested this driver with our TUXEDO InfinityBook Pro AMD Gen= 9. Iperf > > > > > > > revealed that tx is only 100Mbit/s: > > > > > > >=20 > > > > > ... > > > > > > >=20 > > > > > > > With our normally used DKMS module, Ethernet works with full-= duplex and > > > > > > > gigabit. Attached are some logs from lspci and dmesg. Do you = have any > > > > > > > idea how I can debug this further? Just FYI: on the contrary, the DKMS module from vendor often negotiates to 10Mbps (for both RX and TX) on the Loongson 3A6000 and 3C6000 boards but we've not observed any issue with the driver in this series (we also tested with iperf). --=20 Xi Ruoyao