linux-kernel - [PATCH] net: stmmac: dwmac-sophgo: Add phy interface filter

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Message-ID: <20251017011802.523140-1-inochiama@gmail.com>
Date: Fri, 17 Oct 2025 09:18:01 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	"Russell King (Oracle)" <rmk+kernel@...linux.org.uk>,
	Han Gao <rabenda.cn@...il.com>,
	Icenowy Zheng <uwu@...nowy.me>,
	Vivian Wang <wangruikang@...as.ac.cn>,
	Yao Zi <ziyao@...root.org>
Cc: netdev@...r.kernel.org,
	sophgo@...ts.linux.dev,
	linux-stm32@...md-mailman.stormreply.com,
	linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Yixun Lan <dlan@...too.org>,
	Longbin Li <looong.bin@...il.com>
Subject: [PATCH] net: stmmac: dwmac-sophgo: Add phy interface filter

As the SG2042 has an internal rx delay, the delay should be remove
when init the mac, otherwise the phy will be misconfigurated.

Fixes: 543009e2d4cd ("net: stmmac: dwmac-sophgo: Add support for Sophgo SG2042 SoC")
Signed-off-by: Inochi Amaoto <inochiama@...il.com>
Tested-by: Han Gao <rabenda.cn@...il.com>
---
 .../ethernet/stmicro/stmmac/dwmac-sophgo.c    | 25 ++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c b/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
index 3b7947a7a7ba..b2dee1399eb0 100644
--- a/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
+++ b/drivers/net/ethernet/stmicro/stmmac/dwmac-sophgo.c
@@ -7,6 +7,7 @@

 #include <linux/clk.h>
 #include <linux/module.h>
+#include <linux/property.h>
 #include <linux/mod_devicetable.h>
 #include <linux/platform_device.h>

@@ -29,8 +30,23 @@ static int sophgo_sg2044_dwmac_init(struct platform_device *pdev,
 	return 0;
 }

+static int sophgo_sg2042_set_mode(struct plat_stmmacenet_data *plat_dat)
+{
+	switch (plat_dat->phy_interface) {
+	case PHY_INTERFACE_MODE_RGMII_ID:
+		plat_dat->phy_interface = PHY_INTERFACE_MODE_RGMII_TXID;
+		return 0;
+	case PHY_INTERFACE_MODE_RGMII_RXID:
+		plat_dat->phy_interface = PHY_INTERFACE_MODE_RGMII;
+		return 0;
+	default:
+		return -EINVAL;
+	}
+}
+
 static int sophgo_dwmac_probe(struct platform_device *pdev)
 {
+	int (*plat_set_mode)(struct plat_stmmacenet_data *plat_dat);
 	struct plat_stmmacenet_data *plat_dat;
 	struct stmmac_resources stmmac_res;
 	struct device *dev = &pdev->dev;
@@ -50,11 +66,18 @@ static int sophgo_dwmac_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;

+	plat_set_mode = device_get_match_data(&pdev->dev);
+	if (plat_set_mode) {
+		ret = plat_set_mode(plat_dat);
+		if (ret)
+			return ret;
+	}
+
 	return stmmac_dvr_probe(dev, plat_dat, &stmmac_res);
 }

 static const struct of_device_id sophgo_dwmac_match[] = {
-	{ .compatible = "sophgo,sg2042-dwmac" },
+	{ .compatible = "sophgo,sg2042-dwmac", .data = sophgo_sg2042_set_mode },
 	{ .compatible = "sophgo,sg2044-dwmac" },
 	{ /* sentinel */ }
 };
--
2.51.0