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Peter Anvin" , Rajneesh Bhardwaj , David E Box , Andrew Lunn , "David S . Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , Jiawen Wu , Mengyuan Lou , Heiner Kallweit , Hans de Goede , =?UTF-8?Q?Ilpo_J=C3=A4rvinen?= , Richard Cochran , Serge Semin , x86@kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org References: <20250206131859.2960543-1-yong.liang.choong@linux.intel.com> <20250206131859.2960543-3-yong.liang.choong@linux.intel.com> Content-Language: en-US From: Choong Yong Liang In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250219_181228_686979_1999F712 X-CRM114-Status: UNSURE ( 8.61 ) X-CRM114-Notice: Please train this message. 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: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 6/2/2025 11:30 pm, Russell King (Oracle) wrote: > Also, if the reset is required, what happens if we're already using > SGMII, but AN has been disabled temporarily and is then re-enabled? > Is a reset required? > Hi Russell, When we use SGMII with XPCS, the AN is disabled and then re-enabled. This process does not involve any PCS configuration, so a reset is not required. I tested it with stmmac (dwmac5) + xpcs + Marvell (88E1510) PHY, and it works fine when AN is temporarily disabled and then re-enabled without a reset.