usb: typec: tipd: Update partner identity when power status was updated

Whenever the power status is changed make sure to also update the
partner identity to be able to detect changes once de-bouncing and mode
changes are added for CD321x.

Signed-off-by: Hector Martin <marcan@marcan.st>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sven Peter <sven@kernel.org>
Link: https://lore.kernel.org/r/20250914-apple-usb3-tipd-v1-8-4e99c8649024@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Author: marcan

drivers/usb/typec/tipd/core.c

@@ -635,9 +635,16 @@ static irqreturn_t cd321x_interrupt(int irq, void *data)
 	if (!tps6598x_read_status(tps, &status))
 		goto err_unlock;
 
-	if (event & APPLE_CD_REG_INT_POWER_STATUS_UPDATE)
+	if (event & APPLE_CD_REG_INT_POWER_STATUS_UPDATE) {
 		if (!tps6598x_read_power_status(tps))
 			goto err_unlock;
+		if (TPS_POWER_STATUS_PWROPMODE(tps->pwr_status) == TYPEC_PWR_MODE_PD) {
+			if (tps6598x_read_partner_identity(tps)) {
+				dev_err(tps->dev, "failed to read partner identity\n");
+				tps->partner_identity = (struct usb_pd_identity) {0};
+			}
+		}
+	}
 
 	if (event & APPLE_CD_REG_INT_DATA_STATUS_UPDATE)
 		if (!tps->data->read_data_status(tps))