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Thu, 17 Sep 2026 10:10:39 -0700 (PDT) X-Received: by 2002:a17:90b:4f81:b0:39d:febe:7460 with SMTP id 98e67ed59e1d1-39e1e4e354cmr15686474a91.22.1789665039322; Thu, 17 Sep 2026 10:10:39 -0700 (PDT) Received: from oss.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-39e35df479fsm6065347a91.6.2026.09.17.10.10.31 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 17 Sep 2026 10:10:38 -0700 (PDT) Date: Thu, 17 Sep 2026 22:40:29 +0530 From: Mohd Ayaan Anwar To: netdev-bot+sashiko@kernel.org Cc: andrew+netdev@lunn.ch, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, afd@ti.com, andrew@lunn.ch, hkallweit1@gmail.com, linux@armlinux.org.uk, richardcochran@gmail.com, andersson@kernel.org, konradybcio@kernel.org, alexandre.torgue@foss.st.com, peppe.cavallaro@st.com, joabreu@synopsys.com, maxime.chevallier@bootlin.com, mcoquelin.stm32@gmail.com, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH net-next v2 6/9] net: stmmac: qcom-ethqos: warn about legacy RGMII PHY modes Message-ID: References: <20260908-shikra_ethernet-v2-6-bbe3389d0652@oss.qualcomm.com> <178912591683.219967.17377991068527504766@kernel.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <178912591683.219967.17377991068527504766@kernel.org> X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwOTE3MDI0NSBTYWx0ZWRfX44ZL398R5Vta XCFsdQjpafOnEkd0OCo5a+J/i5N174DkjX1pwM55t6CVPFg+9wJLbQcauv2mhsdvYT6YhFP8RGd 3rRM2cdraqF8EsvxpPKBep87o6lWhjdx7lfD7A3aF8BEDdjQBifzn77ilrKCDhkQidY6wdRWhUT vV2LIXIqgYqwo/a/v4YnrniHEOPj7zxBjcU+5+ug8P1PsJL+vtErRFFQQgbDnCGc0MWdtRcBSw7 OsSn1PZK2yep8JEDORUQe+PHqleUNFSPYFyb3lcBzfFX0jiP1QhQLQwjoI521KdemISZHrmKcle o3fGaVR1GWf57k+ZVkGuosXOmFBy7wjJPONVE6aYUHC9HC6FfQxXBME+biTRGxg0isBrZMGkpBF wemKhMt0Q3ECEwxhBdvuWqEYddihldWFlUXgWUPyfgeSNrS3qnBBSIeJxyBKTb6mElEpXhNGnTM lQNppv6/KgVp15X1BEg== X-Proofpoint-ORIG-GUID: leFZ2GfUKtl6hWEpdYNHTb79avv6zywq X-Proofpoint-Spam-Info: AW1haW4tMjYwOTE3MDI0NSBTYWx0ZWRfX2XzOYjnumODI Ew52La/oDvuAyfdZtcb0TLq+C+k32QtZZ6rcDNYlMiskUrDJUs/V4KZLlxzebNqSdV8r9mPbURl TmLpf/MUvtrn2ea05zU9jcEZwCXqves= X-Authority-Analysis: v=2.4 cv=IP2XmQvG c=1 sm=1 tr=0 ts=6aac1f10 cx=c_pps a=UNFcQwm+pnOIJct1K4W+Mw==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=VdqzKS8jKosA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=VwQbUJbxAAAA:8 a=bzSRg-MVb8Bu9kwduOYA:9 a=3ZKOabzyN94A:10 a=QEXdDO2ut3YA:10 a=uKXjsCUrEbL0IQVhDsJ9:22 X-Proofpoint-GUID: leFZ2GfUKtl6hWEpdYNHTb79avv6zywq 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=2026-09-17_04,2026-09-16_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 phishscore=0 priorityscore=1501 suspectscore=0 malwarescore=0 adultscore=0 lowpriorityscore=0 impostorscore=0 spamscore=0 bulkscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2609040000 definitions=main-2609170245 On Fri, Sep 11, 2026 at 11:25:16AM +0000, netdev-bot+sashiko@kernel.org wrote: > Thank you for your contribution! Sashiko AI review found 2 potential > issue(s) to consider: > > Critical: 0 · High: 0 · Medium: 1 · Low: 1 > > - [Medium] Unactionable boot-time warning on every in-tree qcom ethqos > platform: the new dev_warn() in qcom_ethqos_probe() (dwmac-qcom-… > - [Low] Commit message / code mismatch: the changelog of "net: stmmac: > qcom-ethqos: warn about legacy RGMII PHY modes" states that "existing… > > -- > > net: stmmac: qcom-ethqos: warn about legacy RGMII PHY modes > > This adds a probe-time dev_warn() in qcom_ethqos_probe() when the ethernet > node uses one of the older RGMII phy-mode values, suggesting a move to > "rgmii-id" with PHY-provided delays. PHY_INTERFACE_MODE_RGMII_ID is split > out of the shared case group so that it does not warn. > > > diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c > > index 53fb9de4d92c7..a92bf4a6a2dbd 100644 > > --- a/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c > > +++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-qcom-ethqos.c > > @@ -764,9 +764,11 @@ static int qcom_ethqos_probe(struct platform_device *pdev) > > ethqos->phy_mode = plat_dat->phy_interface; > > switch (ethqos->phy_mode) { > > case PHY_INTERFACE_MODE_RGMII: > > - case PHY_INTERFACE_MODE_RGMII_ID: > > case PHY_INTERFACE_MODE_RGMII_RXID: > > case PHY_INTERFACE_MODE_RGMII_TXID: > > + dev_warn(dev, "legacy RGMII phy-mode detected; consider upgrading to a newer DTB\n"); > > [Severity: Low] > The changelog says: > > However, existing DTBs use "rgmii" and "rgmii-txid" and must remain > supported for backwards compatibility. > > Warn when either of these legacy PHY modes is used [...] > > but the warning in qcom_ethqos_probe() is attached to a group of three case > labels, so PHY_INTERFACE_MODE_RGMII_RXID also warns. > > Is "rgmii-rxid" intended to be declared legacy as well? The driver does > treat these modes differently, for example in ethqos_rgmii_macro_init(): > > if (ethqos->phy_mode == PHY_INTERFACE_MODE_RGMII_TXID) > phase_shift = 0; > else > phase_shift = RGMII_CONFIG2_TX_CLK_PHASE_SHIFT_EN; > > so which phy-modes are being deprecated seems worth stating exactly in the > commit message. I will make this clearer in v3 that all non RGMII-ID modes are being deprecated. > > [Severity: Medium] > Is there an upstream DTB that this warning can point people at? No in-tree > device tree for this driver uses "rgmii-id", and this series does not touch > arch/ at all, so every in-tree board hits the new warning on each probe: > > arch/arm64/boot/dts/qcom/qcs404-evb-4000.dts phy-mode = "rgmii"; > arch/arm64/boot/dts/qcom/sa8155p-adp.dts phy-mode = "rgmii"; > arch/arm64/boot/dts/qcom/sa8540p-ride.dts phy-mode = "rgmii-txid"; (both MACs) > > The binding example in Documentation/devicetree/bindings/net/qcom,ethqos.yaml > also still uses: > > phy-mode = "rgmii"; > > and the binding carries no phy-mode deprecation note, so the documented ABI > still recommends what the driver now calls legacy. > > Converting those device trees is also the only way the advocated > PHY-provided-delay path gets exercised, since ethqos_set_clk_tx_rate() stops > doubling the link clock only for PHY_INTERFACE_MODE_RGMII_ID. Would it make > sense to convert the in-tree DTs (and the binding example/text) in the same > series, or to hold off on the warning until a migration target exists? > > > + fallthrough; > > + case PHY_INTERFACE_MODE_RGMII_ID: > > plat_dat->fix_mac_speed = ethqos_fix_mac_speed_rgmii; > > break; > > case PHY_INTERFACE_MODE_2500BASEX: > The plan is to convert the current DTs to use "rgmii-id" after this patch series. Ayaan