From: Weijie Gao <weijie.gao@mediatek.com>
Date: Tue, 17 Dec 2024 08:39:59 +0000 (+0800)
Subject: net: mediatek: don't enable GDMA cpu bridge unconditionally for NETSYSv3
X-Git-Tag: v2025.04-rc1~17^2~12^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b9dfb5636bc5eb9b783b88b8388dc7d1f41d6498;p=pandora-u-boot.git

net: mediatek: don't enable GDMA cpu bridge unconditionally for NETSYSv3

Enable GDMA cpu bridge only when 10Gb interface is enabled for GMAC other
than GMAC0, or when MT7988 internal switch is used.

Signed-off-by: Weijie Gao <weijie.gao@mediatek.com>
---

diff --git a/drivers/net/mtk_eth.c b/drivers/net/mtk_eth.c
index d3f29e4a0d0..888e8c1e855 100644
--- a/drivers/net/mtk_eth.c
+++ b/drivers/net/mtk_eth.c
@@ -1762,10 +1762,16 @@ static int mtk_eth_start(struct udevice *dev)
 		if (priv->sw == SW_MT7988 && priv->gmac_id == 0) {
 			mtk_gdma_write(priv, priv->gmac_id, GDMA_IG_CTRL_REG,
 				       GDMA_BRIDGE_TO_CPU);
-		}
 
-		mtk_gdma_write(priv, priv->gmac_id, GDMA_EG_CTRL_REG,
-			       GDMA_CPU_BRIDGE_EN);
+			mtk_gdma_write(priv, priv->gmac_id, GDMA_EG_CTRL_REG,
+				       GDMA_CPU_BRIDGE_EN);
+		} else if ((priv->phy_interface == PHY_INTERFACE_MODE_USXGMII ||
+			    priv->phy_interface == PHY_INTERFACE_MODE_10GBASER ||
+			    priv->phy_interface == PHY_INTERFACE_MODE_XGMII) &&
+			   priv->gmac_id != 0) {
+			mtk_gdma_write(priv, priv->gmac_id, GDMA_EG_CTRL_REG,
+				       GDMA_CPU_BRIDGE_EN);
+		}
 	}
 
 	udelay(500);