netdev - [PATCH net,v3 2/3] net: ethernet: mediatek: Refine the timing of GDM/PSE setup

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Date:   Wed, 13 Nov 2019 10:38:43 +0800
From:   MarkLee <Mark-MC.Lee@...iatek.com>
To:     "David S. Miller" <davem@...emloft.net>,
        Sean Wang <sean.wang@...iatek.com>,
        John Crispin <john@...ozen.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Andrew Lunn <andrew@...n.ch>
CC:     Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Rene van Dorst <opensource@...rst.com>,
        <devicetree@...r.kernel.org>, <netdev@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        MarkLee <Mark-MC.Lee@...iatek.com>
Subject: [PATCH net,v3 2/3] 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@...iatek.com>
--
v1->v2:
* no change
v2->v3:
* no change

---
 drivers/net/ethernet/mediatek/mtk_eth_soc.c | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
index 6e7a7fea2f52..b147ab0e44ce 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
@@ -2184,6 +2184,9 @@ static void mtk_gdm_config(struct mtk_eth *eth, u32 config)
 {
 	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));
 
@@ -2222,6 +2225,8 @@ static int mtk_open(struct net_device *dev)
 		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);
@@ -2405,8 +2410,6 @@ static int mtk_hw_init(struct mtk_eth *eth)
 	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:
-- 
2.17.1