From 0f03d9bfa1da1d26cb950e4b35b1ff7b9be1828f Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ar=C4=B1n=C3=A7=20=C3=9CNAL?= Date: Mon, 22 Jan 2024 08:35:56 +0300 Subject: [PATCH 27/48] net: dsa: mt7530: improve code path for setting up port 5 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit There're two code paths for setting up port 5: mt7530_setup() -> mt7530_setup_port5() mt753x_phylink_mac_config() -> mt753x_mac_config() -> mt7530_mac_config() -> mt7530_setup_port5() Currently mt7530_setup_port5() from mt7530_setup() always runs. If port 5 is used as a CPU, DSA, or user port, mt7530_setup_port5() from mt753x_phylink_mac_config() won't run. That is because priv->p5_interface set on mt7530_setup_port5() will match state->interface on mt753x_phylink_mac_config() which will stop running mt7530_setup_port5() again. Therefore, mt7530_setup_port5() will never run from mt753x_phylink_mac_config(). Address this by not running mt7530_setup_port5() from mt7530_setup() if port 5 is used as a CPU, DSA, or user port. This driver isn't in the dsa_switches_apply_workarounds[] array so phylink will always be present. To keep the cases where port 5 isn't controlled by phylink working as before, preserve the mt7530_setup_port5() call from mt7530_setup(). Do not set priv->p5_intf_sel to P5_DISABLED. It is already set to that when "priv" is allocated. Move setting the interface to a more specific location. It's supposed to be overwritten if PHY muxing is detected. Improve the comment which explains the process. Signed-off-by: Arınç ÜNAL Reviewed-by: Vladimir Oltean Link: https://lore.kernel.org/r/20240122-for-netnext-mt7530-improvements-1-v3-5-042401f2b279@arinc9.com Signed-off-by: Jakub Kicinski --- drivers/net/dsa/mt7530.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) --- a/drivers/net/dsa/mt7530.c +++ b/drivers/net/dsa/mt7530.c @@ -2532,16 +2532,15 @@ mt7530_setup(struct dsa_switch *ds) return ret; /* Setup port 5 */ - priv->p5_intf_sel = P5_DISABLED; - interface = PHY_INTERFACE_MODE_NA; - if (!dsa_is_unused_port(ds, 5)) { priv->p5_intf_sel = P5_INTF_SEL_GMAC5; - ret = of_get_phy_mode(dsa_to_port(ds, 5)->dn, &interface); - if (ret && ret != -ENODEV) - return ret; } else { - /* Scan the ethernet nodes. look for GMAC1, lookup used phy */ + /* Scan the ethernet nodes. Look for GMAC1, lookup the used PHY. + * Set priv->p5_intf_sel to the appropriate value if PHY muxing + * is detected. + */ + interface = PHY_INTERFACE_MODE_NA; + for_each_child_of_node(dn, mac_np) { if (!of_device_is_compatible(mac_np, "mediatek,eth-mac")) @@ -2572,6 +2571,8 @@ mt7530_setup(struct dsa_switch *ds) of_node_put(phy_node); break; } + + mt7530_setup_port5(ds, interface); } #ifdef CONFIG_GPIOLIB @@ -2582,8 +2583,6 @@ mt7530_setup(struct dsa_switch *ds) } #endif /* CONFIG_GPIOLIB */ - mt7530_setup_port5(ds, interface); - /* Flush the FDB table */ ret = mt7530_fdb_cmd(priv, MT7530_FDB_FLUSH, NULL); if (ret < 0)