target/linux/generic/backport-5.4/761-net-ethernet-mediatek-Refine-the-timing-of-GDM-PSE-s.patch

From: MarkLee <Mark-MC.Lee@mediatek.com>
Date: Wed, 13 Nov 2019 10:38:43 +0800
Subject: [PATCH] net: ethernet: mediatek: Refine the timing of GDM/PSE setup

Refine the timing of GDM/PSE setup, move it from mtk_hw_init
to mtk_open. This is recommended by the mt762x HW design to
do GDM/PSE setup only after PDMA has been started.

We exclude mt7628 in mtk_gdm_config function since it is a old IP
and there is no GDM/PSE block on it.

Signed-off-by: MarkLee <Mark-MC.Lee@mediatek.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---

--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2256,6 +2256,9 @@ static void mtk_gdm_config(struct mtk_et
 {
 	int i;
 
+	if (MTK_HAS_CAPS(eth->soc->caps, MTK_SOC_MT7628))
+		return;
+
 	for (i = 0; i < MTK_MAC_COUNT; i++) {
 		u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i));
 
@@ -2294,6 +2297,8 @@ static int mtk_open(struct net_device *d
 		if (err)
 			return err;
 
+		mtk_gdm_config(eth, MTK_GDMA_TO_PDMA);
+
 		napi_enable(&eth->tx_napi);
 		napi_enable(&eth->rx_napi);
 		mtk_tx_irq_enable(eth, MTK_TX_DONE_INT);
@@ -2477,8 +2482,6 @@ static int mtk_hw_init(struct mtk_eth *e
 	mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2);
 	mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP);
 
-	mtk_gdm_config(eth, MTK_GDMA_TO_PDMA);
-
 	return 0;
 
 err_disable_pm: