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(p200300ea8f2afd00f5c875929084dba1.dip0.t-ipconnect.de. [2003:ea:8f2a:fd00:f5c8:7592:9084:dba1]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-48de0bc506asm260781f8f.47.2026.10.12.09.27.34 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 12 Oct 2026 09:27:35 -0700 (PDT) Message-ID: Date: Mon, 12 Oct 2026 18:27:32 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH net-next] r8169: allow Giga Lite fallback on RTL8168EP To: Hee-Suk Kim , Daniel Golle , Andrew Lunn Cc: netdev@vger.kernel.org, javen , nic_swsd@realtek.com, Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Russell King , linux-kernel@vger.kernel.org References: <20261010135356.85454-1-hskim@dilluti0n.com> <4435b286-1638-464a-821c-f486b647c9f7@lunn.ch> <874ierc6nb.fsf@gmail.com> Content-Language: en-US From: Heiner Kallweit In-Reply-To: <874ierc6nb.fsf@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 12.10.2026 16:53, Hee-Suk Kim wrote: > Daniel Golle writes: > >> On Mon, Oct 12, 2026 at 02:46:27PM +0200, Andrew Lunn wrote: >>> Please add ETHTOOL_LINK_MODE_500baseT2_Full. Make the PHY report this >>> link mode in it features, add the speed, allow it to be negotiated, >>> reported in ethtool etc. > > Will do in v2. > >> While at it also consider ETHTOOL_LINK_MODE_1000baseT2_Full which is >> supported as "2.5G Lite" by the RTL8221/RTL8226 2.5G PHY family. > > Happy to add it as well, but I'd need to know what PHYSR reports for a > 2.5G Lite link on those PHYs, as I can't test it myself. Do you happen > to know? > Also the needed register configuration may be different. Would be helpful to get advise from Javen/Realtek on: - Which lite modes exist? - Which chip versions support which lite modes? - What is the needed configuration per lite mode (according to vendor drivers the config may be different per advertised speeds) I can't tell as I have no access to Realtek documentation. > Thanks, > hsk