On Wed, Aug 21, 2019 at 04:43:34PM +0200, René van Dorst wrote:

+static void mtk_mac_link_down(struct phylink_config *config, unsigned int mode,
+			      phy_interface_t interface)
+{
+	struct mtk_mac *mac = container_of(config, struct mtk_mac,
+					   phylink_config);
 
-	return 0;
+	mtk_w32(mac->hw, MAC_MCR_FORCE_LINK_DOWN, MTK_MAC_MCR(mac->id));
 }

You set the MAC_MCR_FORCE_MODE bit here...

+static void mtk_mac_link_up(struct phylink_config *config, unsigned int mode,
+			    phy_interface_t interface,
+			    struct phy_device *phy)
 {
+	struct mtk_mac *mac = container_of(config, struct mtk_mac,
+					   phylink_config);
+	u32 mcr = mtk_r32(mac->hw, MTK_MAC_MCR(mac->id));
 
+	mcr |= MAC_MCR_TX_EN | MAC_MCR_RX_EN;
+	mtk_w32(mac->hw, mcr, MTK_MAC_MCR(mac->id));
+}

Looking at this, a link_down() followed by a link_up() would result in
this register containing MAC_MCR_FORCE_MODE | MAC_MCR_TX_EN |
MAC_MCR_RX_EN ?  Is that actually correct?  (MAC_MCR_FORCE_LINK isn't
set, so it looks to me like it still forces the link down.)

Note that link up/down forcing should not be done for in-band AN.

+static void mtk_validate(struct phylink_config *config,
+			 unsigned long *supported,
+			 struct phylink_link_state *state)
+{
+	struct mtk_mac *mac = container_of(config, struct mtk_mac,
+					   phylink_config);
+	__ETHTOOL_DECLARE_LINK_MODE_MASK(mask) = { 0, };
 
+	if (state->interface != PHY_INTERFACE_MODE_NA &&
+	    state->interface != PHY_INTERFACE_MODE_MII &&
+	    state->interface != PHY_INTERFACE_MODE_GMII &&
+	    !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_RGMII) &&
+	      phy_interface_mode_is_rgmii(state->interface)) &&
+	    !(MTK_HAS_CAPS(mac->hw->soc->caps, MTK_TRGMII) &&
+	      !mac->id && state->interface == PHY_INTERFACE_MODE_TRGMII)) {
+		linkmode_zero(supported);
+		return;
 	}
 
+	phylink_set_port_modes(mask);
+	phylink_set(mask, Autoneg);
 
+	if (state->interface == PHY_INTERFACE_MODE_TRGMII) {
+		phylink_set(mask, 1000baseT_Full);
+	} else {
+		phylink_set(mask, 10baseT_Half);
+		phylink_set(mask, 10baseT_Full);
+		phylink_set(mask, 100baseT_Half);
+		phylink_set(mask, 100baseT_Full);
+
+		if (state->interface != PHY_INTERFACE_MODE_MII) {
+			phylink_set(mask, 1000baseT_Half);
+			phylink_set(mask, 1000baseT_Full);
+			phylink_set(mask, 1000baseX_Full);
+		}
+	}
 
+	phylink_set(mask, Pause);
+	phylink_set(mask, Asym_Pause);
 
+	linkmode_and(supported, supported, mask);
+	linkmode_and(state->advertising, state->advertising, mask);
 }

This looks fine.

Thanks.

-- 
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