usb: mtu3: fix error of xhci port id when enable U3 dual role (78af87b8) · Commits · 戴 / test

If dual role mode is enabled, when switch u3port0 to device mode, it will affect port id calculation of host(xHCI), specially when host supports multi U2 ports or U3 ports, so need enable its dual role mode, and fix it here. Signed-off-by:

Chunfeng Yun <chunfeng.yun@mediatek.com> Cc: stable <stable@vger.kernel.org> Signed-off-by:

Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/usb/mtu3/mtu3_core.c

+5 −1

Original line number	Diff line number	Diff line
		@@ -107,8 +107,12 @@ static int mtu3_device_enable(struct mtu3 *mtu)
		(SSUSB_U2_PORT_DIS \| SSUSB_U2_PORT_PDN \|
		SSUSB_U2_PORT_HOST_SEL));

		if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG)
		if (mtu->ssusb->dr_mode == USB_DR_MODE_OTG) {
		mtu3_setbits(ibase, SSUSB_U2_CTRL(0), SSUSB_U2_PORT_OTG_SEL);
		if (mtu->is_u3_ip)
		mtu3_setbits(ibase, SSUSB_U3_CTRL(0),
		SSUSB_U3_PORT_DUAL_MODE);
		}

		return ssusb_check_clocks(mtu->ssusb, check_clk);
		}

drivers/usb/mtu3/mtu3_hw_regs.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -459,6 +459,7 @@

		/* U3D_SSUSB_U3_CTRL_0P */
		#define SSUSB_U3_PORT_SSP_SPEED BIT(9)
		#define SSUSB_U3_PORT_DUAL_MODE BIT(7)
		#define SSUSB_U3_PORT_HOST_SEL BIT(2)
		#define SSUSB_U3_PORT_PDN BIT(1)
		#define SSUSB_U3_PORT_DIS BIT(0)

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