[PATCH v8 22/29] phy: rockchip: usbdp: Properly handle TYPEC_STATE_SAFE and TYPEC_STATE_USB

[Sebastian Reichel]

Handle TYPEC_STATE_SAFE and TYPEC_STATE_USB Type-C state events,
so that the muxing is properly updated when exiting DP AltMode.

Fixes: 2f70bbddeb45 ("phy: rockchip: add usbdp combo phy driver")
Reported-by: Sashiko <sashiko-bot@xxxxxxxxxx>
Closes: https://sashiko.dev/#/message/20260619155020.CC7361F000E9%40smtp.kernel.org
Signed-off-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
---
 drivers/phy/rockchip/phy-rockchip-usbdp.c | 21 +++++++++++++++------
 1 file changed, 15 insertions(+), 6 deletions(-)

diff --git a/drivers/phy/rockchip/phy-rockchip-usbdp.c b/drivers/phy/rockchip/phy-rockchip-usbdp.c
index 7c3b0d45d938..63fb41ad0199 100644
--- a/drivers/phy/rockchip/phy-rockchip-usbdp.c
+++ b/drivers/phy/rockchip/phy-rockchip-usbdp.c
@@ -1327,17 +1327,26 @@ static const struct phy_ops rk_udphy_usb3_phy_ops = {
 	.owner		= THIS_MODULE,
 };
 
+static bool rk_udphy_is_supported_mode(struct typec_mux_state *state)
+{
+	/* Handle Safe State and USB State */
+	if (state->mode < TYPEC_STATE_MODAL)
+		return true;
+
+	/* Handle DP AltMode */
+	if (state->alt && state->alt->svid == USB_TYPEC_DP_SID)
+		return true;
+
+	return false;
+}
+
 static int rk_udphy_typec_mux_set(struct typec_mux_dev *mux,
 				  struct typec_mux_state *state)
 {
 	struct rk_udphy *udphy = typec_mux_get_drvdata(mux);
 
-	/*
-	 * Ignore mux events not involving DP AltMode, because
-	 * the mode field is being reused, e.g. state->mode == 4
-	 * could be either TYPEC_MODE_USB4 or TYPEC_DP_STATE_C.
-	 */
-	if (!state->alt || state->alt->svid != USB_TYPEC_DP_SID)
+	/* Ignore mux events not involving USB or DP */
+	if (!rk_udphy_is_supported_mode(state))
 		return 0;
 
 	mutex_lock(&udphy->mutex);

-- 
2.53.0