[PATCH v15 08/11] phy: rockchip: usbdp: Add some extra debug messages

@@ -23,6 +23,7 @@
 #include <linux/property.h>
 #include <linux/regmap.h>
 #include <linux/reset.h>
+#include <linux/string_choices.h>
 #include <linux/usb/ch9.h>
 #include <linux/usb/typec_dp.h>
 #include <linux/usb/typec_mux.h>

@@ -461,6 +462,8 @@ static int rk_udphy_reset_deassert(struct rk_udphy *udphy, char *name)
 			return reset_control_deassert(list[idx].rstc);
 	}
 
+	dev_err(udphy->dev, "failed to de-assert missing reset line: %s\n", name);
+
 	return -EINVAL;
 }
 

@@ -487,6 +490,8 @@ static void rk_udphy_u3_port_disable(struct rk_udphy *udphy, u8 disable)
 	const struct rk_udphy_cfg *cfg = udphy->cfgs;
 	const struct rk_udphy_grf_reg *preg;
 
+	dev_dbg(udphy->dev, "USB3 port %s\n", str_on_off(!disable));
+
 	preg = udphy->id ? &cfg->grfcfg.usb3otg1_cfg : &cfg->grfcfg.usb3otg0_cfg;
 	rk_udphy_grfreg_write(udphy->usbgrf, preg, disable);
 }

@@ -661,8 +666,10 @@ static int rk_udphy_orien_sw_set(struct typec_switch_dev *sw,
 		return 0;
 	}
 
-	if (udphy->flip != flipped)
+	if (udphy->flip != flipped) {
+		dev_dbg(udphy->dev, "cable orientation changed, PHY re-init required.\n");
 		udphy->phy_needs_reinit = true;
+	}
 
 	udphy->flip = flipped;
 	rk_udphy_set_typec_default_mapping(udphy);

@@ -780,6 +787,11 @@ static int rk_udphy_init(struct rk_udphy *udphy)
 	const struct rk_udphy_cfg *cfg = udphy->cfgs;
 	int ret;
 
+	dev_dbg(udphy->dev, "reinit PHY with USB3=%s and DP=%s (%u lanes) flipped=%s\n",
+		str_on_off(udphy->mode & UDPHY_MODE_USB),
+		str_on_off(udphy->mode & UDPHY_MODE_DP),
+		udphy->dp_lanes, str_yes_no(udphy->flip));
+
 	rk_udphy_reset_assert_all(udphy);
 	usleep_range(10000, 11000);
 

@@ -850,6 +862,8 @@ static int rk_udphy_setup(struct rk_udphy *udphy)
 {
 	int ret;
 
+	dev_dbg(udphy->dev, "enable PHY\n");
+
 	ret = clk_bulk_prepare_enable(udphy->num_clks, udphy->clks);
 	if (ret) {
 		dev_err(udphy->dev, "failed to enable clk\n");

@@ -868,6 +882,7 @@ static int rk_udphy_setup(struct rk_udphy *udphy)
 
 static void rk_udphy_disable(struct rk_udphy *udphy)
 {
+	dev_dbg(udphy->dev, "disable PHY\n");
 	clk_bulk_disable_unprepare(udphy->num_clks, udphy->clks);
 	rk_udphy_reset_assert_all(udphy);
 }

@@ -1307,8 +1322,12 @@ static int rk_udphy_typec_mux_set(struct typec_mux_dev *mux,
 	struct rk_udphy *udphy = typec_mux_get_drvdata(mux);
 
 	/* Ignore mux events not involving USB or DP */
-	if (!rk_udphy_is_supported_mode(state))
+	if (!rk_udphy_is_supported_mode(state)) {
+		dev_dbg(udphy->dev, "ignore mux event with mode=%lu\n", state->mode);
 		return 0;
+	}
+
+	dev_dbg(udphy->dev, "new mode: %lu\n", state->mode);
 
 	guard(mutex)(&udphy->mutex);