improve net-designware-improve-ethernet-DMA-reset.patch

Signed-off-by: Artem Lapkin <[email protected]>

packages/u-boot-mainline/patches/v2021.07-rc1/9101-net-designware-improve-ethernet-DMA-reset.patch

@@ -1,6 +1,6 @@
-From 6318d121d7c604f128926650f6857b6dd12a2a0a Mon Sep 17 00:00:00 2001
+From 0cc1d7b19f30e1938cbb3095ef24dd3e0595cc5e Mon Sep 17 00:00:00 2001
 From: Artem Lapkin <[email protected]>
-Date: Wed, 21 Jul 2021 12:44:17 +0800
+Date: Wed, 21 Jul 2021 13:57:55 +0800
 Subject: [PATCH] net: designware: improve ethernet DMA reset
 
 Problem: uboot ethernet always have "DMA reset timeout" after
@@ -23,19 +23,28 @@ patch may be just hack.
 
 Signed-off-by: Artem Lapkin <[email protected]>
 ---
- drivers/net/designware.c | 2 ++
- 1 file changed, 2 insertions(+)
+ drivers/net/designware.c | 4 ++++
+ 1 file changed, 4 insertions(+)
 
 diff --git a/drivers/net/designware.c b/drivers/net/designware.c
-index 5d92257e..4433abe9 100644
+index 5d92257e..6485c46d 100644
 --- a/drivers/net/designware.c
 +++ b/drivers/net/designware.c
-@@ -389,6 +389,8 @@ int designware_eth_init(struct dw_eth_dev *priv, u8 *enetaddr)
+@@ -371,6 +371,7 @@ int designware_eth_init(struct dw_eth_dev *priv, u8 *enetaddr)
+ 	struct eth_dma_regs *dma_p = priv->dma_regs_p;
+ 	unsigned int start;
+ 	int ret;
++	int phy_reset_force=0;
+
+ 	writel(readl(&dma_p->busmode) | DMAMAC_SRST, &dma_p->busmode);
+
+@@ -389,6 +390,9 @@ int designware_eth_init(struct dw_eth_dev *priv, u8 *enetaddr)
  			printf("DMA reset timeout\n");
  			return -ETIMEDOUT;
  		}
-+		// forced phy reset can help with DMAMAC_SRST
-+		phy_reset(priv->phydev);
++		// forced phy reset after 0.2s can help with DMAMAC_SRST
++		if (phy_reset_force++ == 2)
++			phy_reset(priv->phydev);
 
  		mdelay(100);
  	};