From: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
To: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Vinod Koul <vkoul@kernel.org>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Chen-Yu Tsai <wens@kernel.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Shawn Guo <shawnguo@kernel.org>,
Fabio Estevam <festevam@gmail.com>,
Jan Petrous <jan.petrous@oss.nxp.com>,
s32@nxp.com, Romain Gantois <romain.gantois@bootlin.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Maxime Ripard <mripard@kernel.org>,
Christophe Roullier <christophe.roullier@foss.st.com>,
Bartosz Golaszewski <brgl@kernel.org>,
Eric Dumazet <edumazet@kernel.org>, Radu Rendec <radu@rendec.net>,
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 <dfustini@tenstorrent.com>,
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 <bartosz.golaszewski@linaro.org>
Subject: Re: [PATCH net-next v16 4/7] net: stmmac: qcom-ethqos: update phy_mode to the resolved interface in mac_finish()
Date: Sat, 17 Oct 2026 22:09:10 +0530 [thread overview]
Message-ID: <atOkrubiz/V7aFiu@oss.qualcomm.com> (raw)
In-Reply-To: <20261014-qcom-sa8255p-emac-v16-4-0266c2ead980@oss.qualcomm.com>
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 <bartosz.golaszewski@oss.qualcomm.com>
> ---
I am not sure but should this have a Fixes: tag?
Reviewed-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Ayaan
WARNING: multiple messages have this Message-ID (diff)
From: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
To: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Vinod Koul <vkoul@kernel.org>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Chen-Yu Tsai <wens@kernel.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Shawn Guo <shawnguo@kernel.org>,
Fabio Estevam <festevam@gmail.com>,
Jan Petrous <jan.petrous@oss.nxp.com>,
s32@nxp.com, Romain Gantois <romain.gantois@bootlin.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Maxime Ripard <mripard@kernel.org>,
Christophe Roullier <christophe.roullier@foss.st.com>,
Bartosz Golaszewski <brgl@kernel.org>,
Eric Dumazet <edumazet@kernel.org>, Radu Rendec <radu@rendec.net>,
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 <dfustini@tenstorrent.com>,
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 <bartosz.golaszewski@linaro.org>
Subject: Re: [PATCH net-next v16 4/7] net: stmmac: qcom-ethqos: update phy_mode to the resolved interface in mac_finish()
Date: Sat, 17 Oct 2026 22:09:10 +0530 [thread overview]
Message-ID: <atOkrubiz/V7aFiu@oss.qualcomm.com> (raw)
In-Reply-To: <20261014-qcom-sa8255p-emac-v16-4-0266c2ead980@oss.qualcomm.com>
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 <bartosz.golaszewski@oss.qualcomm.com>
> ---
I am not sure but should this have a Fixes: tag?
Reviewed-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Ayaan
_______________________________________________
linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv
WARNING: multiple messages have this Message-ID (diff)
From: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
To: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Vinod Koul <vkoul@kernel.org>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Chen-Yu Tsai <wens@kernel.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Shawn Guo <shawnguo@kernel.org>,
Fabio Estevam <festevam@gmail.com>,
Jan Petrous <jan.petrous@oss.nxp.com>,
s32@nxp.com, Romain Gantois <romain.gantois@bootlin.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Maxime Ripard <mripard@kernel.org>,
Christophe Roullier <christophe.roullier@foss.st.com>,
Bartosz Golaszewski <brgl@kernel.org>,
Eric Dumazet <edumazet@kernel.org>, Radu Rendec <radu@rendec.net>,
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 <dfustini@tenstorrent.com>,
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 <bartosz.golaszewski@linaro.org>
Subject: Re: [PATCH net-next v16 4/7] net: stmmac: qcom-ethqos: update phy_mode to the resolved interface in mac_finish()
Date: Sat, 17 Oct 2026 22:09:10 +0530 [thread overview]
Message-ID: <atOkrubiz/V7aFiu@oss.qualcomm.com> (raw)
In-Reply-To: <20261014-qcom-sa8255p-emac-v16-4-0266c2ead980@oss.qualcomm.com>
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 <bartosz.golaszewski@oss.qualcomm.com>
> ---
I am not sure but should this have a Fixes: tag?
Reviewed-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Ayaan
_______________________________________________
linux-amlogic mailing list
linux-amlogic@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-amlogic
WARNING: multiple messages have this Message-ID (diff)
From: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
To: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
Cc: Bjorn Andersson <andersson@kernel.org>,
Konrad Dybcio <konradybcio@kernel.org>,
Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>,
Andrew Lunn <andrew+netdev@lunn.ch>,
"David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Alexandre Torgue <alexandre.torgue@foss.st.com>,
Vinod Koul <vkoul@kernel.org>,
Giuseppe Cavallaro <peppe.cavallaro@st.com>,
Chen-Yu Tsai <wens@kernel.org>,
Jernej Skrabec <jernej.skrabec@gmail.com>,
Neil Armstrong <neil.armstrong@linaro.org>,
Kevin Hilman <khilman@baylibre.com>,
Jerome Brunet <jbrunet@baylibre.com>,
Shawn Guo <shawnguo@kernel.org>,
Fabio Estevam <festevam@gmail.com>,
Jan Petrous <jan.petrous@oss.nxp.com>,
s32@nxp.com, Romain Gantois <romain.gantois@bootlin.com>,
Geert Uytterhoeven <geert+renesas@glider.be>,
Magnus Damm <magnus.damm@gmail.com>,
Maxime Ripard <mripard@kernel.org>,
Christophe Roullier <christophe.roullier@foss.st.com>,
Bartosz Golaszewski <brgl@kernel.org>,
Eric Dumazet <edumazet@kernel.org>, Radu Rendec <radu@rendec.net>,
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 <dfustini@tenstorrent.com>,
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 <bartosz.golaszewski@linaro.org>
Subject: Re: [PATCH net-next v16 4/7] net: stmmac: qcom-ethqos: update phy_mode to the resolved interface in mac_finish()
Date: Sat, 17 Oct 2026 22:09:10 +0530 [thread overview]
Message-ID: <atOkrubiz/V7aFiu@oss.qualcomm.com> (raw)
In-Reply-To: <20261014-qcom-sa8255p-emac-v16-4-0266c2ead980@oss.qualcomm.com>
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 <bartosz.golaszewski@oss.qualcomm.com>
> ---
I am not sure but should this have a Fixes: tag?
Reviewed-by: Mohd Ayaan Anwar <mohd.anwar@oss.qualcomm.com>
Ayaan
_______________________________________________
Linux-rockchip mailing list
Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip
next prev parent reply other threads:[~2026-10-17 16:39 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-14 12:36 [PATCH net-next v16 0/7] net: stmmac: qcom-ethqos: add support for SCMI power domains Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` [PATCH net-next v16 1/7] net: stmmac: dwmac4: don't program the 1us tick counter without a CSR clock Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` [PATCH net-next v16 2/7] dt-bindings: net: qcom: document the ethqos device for SCMI-based systems Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-15 12:40 ` sashiko-bot
2026-10-15 12:40 ` sashiko-bot
2026-10-14 12:36 ` [PATCH net-next v16 3/7] net: stmmac: qcom-ethqos: set serdes mode before powerup Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-17 16:34 ` Mohd Ayaan Anwar
2026-10-17 16:34 ` Mohd Ayaan Anwar
2026-10-17 16:34 ` Mohd Ayaan Anwar
2026-10-17 16:34 ` Mohd Ayaan Anwar
2026-10-14 12:36 ` [PATCH net-next v16 4/7] net: stmmac: qcom-ethqos: update phy_mode to the resolved interface in mac_finish() Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-17 16:39 ` Mohd Ayaan Anwar [this message]
2026-10-17 16:39 ` Mohd Ayaan Anwar
2026-10-17 16:39 ` Mohd Ayaan Anwar
2026-10-17 16:39 ` Mohd Ayaan Anwar
2026-10-14 12:36 ` [PATCH net-next v16 5/7] net: stmmac: qcom-ethqos: reuse the address of ethqos_emac_driver_data Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-17 16:42 ` Mohd Ayaan Anwar
2026-10-17 16:42 ` Mohd Ayaan Anwar
2026-10-17 16:42 ` Mohd Ayaan Anwar
2026-10-17 16:42 ` Mohd Ayaan Anwar
2026-10-14 12:36 ` [PATCH net-next v16 6/7] net: stmmac: qcom-ethqos: factor out linux-level setup into a separate function Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-17 16:51 ` Mohd Ayaan Anwar
2026-10-17 16:51 ` Mohd Ayaan Anwar
2026-10-17 16:51 ` Mohd Ayaan Anwar
2026-10-17 16:51 ` Mohd Ayaan Anwar
2026-10-14 12:36 ` [PATCH net-next v16 7/7] net: stmmac: qcom-ethqos: add support for sa8255p Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
2026-10-14 12:36 ` Bartosz Golaszewski
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