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Sat, 17 Oct 2026 09:39:26 -0700 (PDT) Received: from oss.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 5a478bee46e88-360813b6e33sm17691508eec.7.2026.10.17.09.39.12 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 17 Oct 2026 09:39:26 -0700 (PDT) Date: Sat, 17 Oct 2026 22:09:10 +0530 From: Mohd Ayaan Anwar To: Bartosz Golaszewski Cc: Bjorn Andersson , Konrad Dybcio , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Andrew Lunn , "David S. Miller" , Jakub Kicinski , Paolo Abeni , Maxime Coquelin , Alexandre Torgue , Vinod Koul , Giuseppe Cavallaro , Chen-Yu Tsai , Jernej Skrabec , Neil Armstrong , Kevin Hilman , Jerome Brunet , Shawn Guo , Fabio Estevam , Jan Petrous , s32@nxp.com, Romain Gantois , Geert Uytterhoeven , Magnus Damm , Maxime Ripard , Christophe Roullier , Bartosz Golaszewski , Eric Dumazet , Radu Rendec , linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org, Drew Fustini , linux-sunxi@lists.linux.dev, linux-amlogic@lists.infradead.org, linux-mips@vger.kernel.org, imx@lists.linux.dev, linux-renesas-soc@vger.kernel.org, linux-rockchip@lists.infradead.org, sophgo@lists.linux.dev, linux-riscv@lists.infradead.org, Bartosz Golaszewski Subject: Re: [PATCH net-next v16 4/7] net: stmmac: qcom-ethqos: update phy_mode to the resolved interface in mac_finish() Message-ID: References: <20261014-qcom-sa8255p-emac-v16-0-0266c2ead980@oss.qualcomm.com> <20261014-qcom-sa8255p-emac-v16-4-0266c2ead980@oss.qualcomm.com> Precedence: bulk X-Mailing-List: linux-kernel@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: <20261014-qcom-sa8255p-emac-v16-4-0266c2ead980@oss.qualcomm.com> X-Authority-Analysis: v=2.4 cv=BNUmP1QG c=1 sm=1 tr=0 ts=6ad3a4c0 cx=c_pps a=cFYjgdjTJScbgFmBucgdfQ==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=kj9zAlcOel0A:10 a=660iZSQnnn4A:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=rJkE3RaqiGZ5pbrm-msn:22 a=EUspDBNiAAAA:8 a=K33ZUWoUxhUzfzW7EYwA:9 a=CjuIK1q_8ugA:10 a=scEy_gLbYbu1JhEsrz4S:22 X-Proofpoint-GUID: NPvvE-fTHJuLjoX-6mEtVj-tx-2DTKgO X-Proofpoint-Spam-Info: AW1haW4tMjYxMDE3MDA2NiBTYWx0ZWRfX5wn1GwSACuze nm5z2C46SsENY8ZqlCCKAdlpnkij3htQ8ycDSDYTDff+vlqyEMx+FqWUpK41Pql3546b2NWt1tG yf5coQId3Z9Di1Ycx86f1O598STAkyU= X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYxMDE3MDA2NiBTYWx0ZWRfXy0PCiAyUDLxn fARVQIdr5yzs3CQnqkPK6AUZUh/aylrsXwjXeY7KL/PCgrfYEn8KkcvN4FeKPBseb8dt566xzfH dany3fS9fSybeod+/dRV1pvSfrRPiwUvmOC0ZuyLpbV6XLVjHhxezDUVdS2b1+hxHt+3f2Ed3ss 0kJgDN53WADe0AvwhSYCpjijGYsNN4ihUpS1OqgKlxgDlF5UJZSPw+5BfryoHogeZ+LHAXB02pR wz+mpwAd65F/R2X4uaacbpQjiSlWmteJp1KpC5aXJxdvfIs1vwotlkdm6Ley3qjJiqUJcHMMck5 SF6cSe6gt5KIGxW0uFIoyJh1I/QEFf4UW3KoKZYA/ykyCcsU1qxtUHEQv/R2wbnlc9EhlLlGawi gJAJ54ndYlVsous/UaX43t7o1FMZXK97PqkJdH9GV/SojIQyHPntZN93U8MZI6L3H91PR4B0aed +WXco0yMUOzSawbbFKg== X-Proofpoint-ORIG-GUID: NPvvE-fTHJuLjoX-6mEtVj-tx-2DTKgO 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=2026-10-17_05,2026-10-14_01,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 bulkscore=0 impostorscore=0 priorityscore=1501 malwarescore=0 phishscore=0 lowpriorityscore=0 clxscore=1015 suspectscore=0 adultscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2610080000 definitions=main-2610170066 On Wed, Oct 14, 2026 at 02:36:43PM +0200, Bartosz Golaszewski wrote: > ethqos->phy_mode is read by serdes_powerup() and > qcom_ethqos_set_sgmii_loopback() to configure the SerDes and its > wrapper for the correct interface. It is set once at probe from the DT > phy-mode property and never updated. > > phylink resolves the actual runtime interface and passes it to the > mac_finish() callback. On platforms that only ever operate at one speed > these two values are always the same, but when the interface changes > at runtime - for example switching between SGMII and 2500BASE-X - the > stored value becomes stale. The next serdes_powerup() call, on > a subsequent link cycle, then reinitializes the SerDes to the wrong mode. > > Update ethqos->phy_mode from the interface argument in > ethqos_mac_finish_serdes() so that it always reflects the last > resolved interface. > > With that, we now update the phy_mode to the runtime-resolved interface, > so any subsequent resume with a 1G SGMII link skips the loopback setup > and the DMA reset hangs. To remedy this, extend the guard to include > PHY_INTERFACE_MODE_SGMII. > > Signed-off-by: Bartosz Golaszewski > --- I am not sure but should this have a Fixes: tag? Reviewed-by: Mohd Ayaan Anwar Ayaan