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eth: fix network IP address loss after resume [1/1]

Browse Source 
PD#SWPL-141159

Problem:
network IP address loss after resume

Solution:
add delay and re-enable MAC RX/TX after PHY restart auto-negotiation

Verify:
T950S-BE311-X5-X8-REF#020

Change-Id: I93328d774fb51379070e8a826ad530d537b0221c
Signed-off-by: xiangyang.yan <xiangyang.yan@amlogic.com>
This commit is contained in:
xiangyang.yan
2023-11-02 14:31:47 +08:00
committed by Dongjin Kim
parent 2847df4124
commit 8ee30fe2fc
1 changed files with 12 additions and 1 deletions
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13
drivers/net/ethernet/stmicro/stmmac/dwmac-meson8b.c
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@@ -41,6 +41,11 @@
#define PRG_ETH0_EXT_RGMII_MODE 1
#define PRG_ETH0_EXT_RMII_MODE 4
#if IS_ENABLED(CONFIG_AMLOGIC_ETH_PRIVE)
#define PRG_ETH0_MAC_ENABLE_RX BIT(2)
#define PRG_ETH0_MAC_ENABLE_TX BIT(3)
#endif
/* mux to choose between fclk_div2 (bit unset) and mpll2 (bit set) */
#define PRG_ETH0_CLK_M250_SEL_MASK GENMASK(4, 4)
@@ -728,8 +733,9 @@ static int meson8b_resume(struct device *dev)
struct net_device *ndev = dev_get_drvdata(dev);
struct stmmac_priv *priv = netdev_priv(ndev);
struct meson8b_dwmac *dwmac = priv->plat->bsp_priv;
int ret;
struct phy_device *phydev = ndev->phydev;
int ret;
u32 regval;
priv->wolopts = 0;
@@ -751,6 +757,11 @@ static int meson8b_resume(struct device *dev)
mii_lpa_to_linkmode_lpa_t(phydev->advertising, backup_adv);
genphy_restart_aneg(phydev);
backup_adv = 0;
msleep(3000);
// re-enable MAC Rx/Tx to resolve network broken issue
regval = readl(priv->ioaddr + PRG_ETH0);
regval |= PRG_ETH0_MAC_ENABLE_RX | PRG_ETH0_MAC_ENABLE_TX;
writel(regval, priv->ioaddr + PRG_ETH0);
}
/*RTC wait linkup*/
pr_info("eth hold wakelock 5s\n");