phy: rockchip-inno-usb2: Fix muxed interrupt support

This commit fixes two issues with the muxed interrupt handler. First,
the OTG port has the "bvalid" interrupt enabled, not "linestate". Since
only the linestate interrupt was handled, and not the bvalid interrupt,
plugging in a cable to the OTG port caused an interrupt storm.

Second, the return values from the individual port IRQ handlers need to
be OR-ed together. Otherwise, the lack of an interrupt from the last
port would cause the handler to erroneously return IRQ_NONE.

Fixes: ed2b5a8e6b ("phy: phy-rockchip-inno-usb2: support muxed interrupts")
Signed-off-by: Samuel Holland <samuel@sholland.org>
Tested-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220414032258.40984-2-samuel@sholland.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/rockchip/phy-rockchip-inno-usb2.c

@@ -940,8 +940,14 @@ static irqreturn_t rockchip_usb2phy_irq(int irq, void *data)
 		if (!rport->phy)
 			continue;
 
-		/* Handle linestate irq for both otg port and host port */
-		ret = rockchip_usb2phy_linestate_irq(irq, rport);
+		switch (rport->port_id) {
+		case USB2PHY_PORT_OTG:
+			ret |= rockchip_usb2phy_otg_mux_irq(irq, rport);
+			break;
+		case USB2PHY_PORT_HOST:
+			ret |= rockchip_usb2phy_linestate_irq(irq, rport);
+			break;
+		}
 	}
 
 	return ret;