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Commit c3355f3b authored by Linyu Yuan's avatar Linyu Yuan
Browse files

usb: misc: nb7vpq904m: support 4 lanes display 



change to DP only mode when display is 4 lanes.

Change-Id: I5bd383ccc44afc2d60fff7068f0c52f45a3a93a5
Signed-off-by: default avatarLinyu Yuan <linyyuan@codeaurora.org>
parent 197f1cc9

drivers/usb/dwc3/dwc3-msm.c

+6 −0
Original line number Diff line number Diff line
@@ -40,6 +40,7 @@ 
#include <linux/reset.h>

#include <linux/usb/dwc3-msm.h>

#include <linux/usb/role.h>

#include <linux/usb/redriver.h>



#include "core.h"

#include "gadget.h"
@@ -3985,6 +3986,7 @@ int dwc3_msm_release_ss_lane(struct device *dev) 
{

	struct dwc3_msm *mdwc = dev_get_drvdata(dev);

	struct dwc3 *dwc = NULL;

	struct device_node *ssusb_redriver_node;



	if (mdwc == NULL) {

		dev_err(dev, "dwc3-msm is not initialized yet.\n");
@@ -4002,6 +4004,10 @@ int dwc3_msm_release_ss_lane(struct device *dev) 
	flush_work(&mdwc->resume_work);

	drain_workqueue(mdwc->sm_usb_wq);



	ssusb_redriver_node =

		of_parse_phandle(mdwc->dev->of_node, "ssusb_redriver", 0);

	redriver_release_usb_lanes(ssusb_redriver_node);



	mdwc->ss_release_called = true;

	if (mdwc->id_state == DWC3_ID_GROUND) {

		/* stop USB host mode */

drivers/usb/misc/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -266,8 +266,12 @@ config USB_CHAOSKEY 
	  To compile this driver as a module, choose M here: the

	  module will be called chaoskey.



config USB_REDRIVER

	bool



config USB_REDRIVER_NB7VPQ904M

	tristate "USB 3.1 Gen1/Gen2 10Gbps re-driver driver for NB7VPQ904M"

	depends on USB_PHY

	select USB_REDRIVER

	help

	  Say Y here if you want to support USB super speed re-driver NB7VPQ904M.

drivers/usb/misc/ssusb-redriver-nb7vpq904m.c

+41 −2
Original line number Diff line number Diff line
@@ -14,6 +14,7 @@ 
#include <linux/usb/ucsi_glink.h>

#include <linux/pinctrl/consumer.h>

#include <linux/of_gpio.h>

#include <linux/usb/redriver.h>



/* priority: INT_MAX >= x >= 0 */

#define NOTIFIER_PRIORITY		1
@@ -503,10 +504,21 @@ static int ssusb_redriver_ucsi_notifier(struct notifier_block *nb, 
	struct ucsi_glink_constat_info *info = data;

	enum operation_mode op_mode;



	if (info->partner_usb && info->partner_alternate_mode)

	/*

	 * when connect a DP only cable,

	 * ucsi set usb flag first, then set usb and alternate mode

	 * after dp start link training.

	 * it should only set alternate_mode flag ???

	 */

	if (info->partner_usb && info->partner_alternate_mode) {

		if (redriver->op_mode == OP_MODE_DP)

			return NOTIFY_OK;

		op_mode = OP_MODE_USB_AND_DP;

	else if (info->partner_usb)

	} else if (info->partner_usb) {

		if (redriver->op_mode == OP_MODE_DP)

			return NOTIFY_OK;

		op_mode = OP_MODE_USB;

	}

	else if (info->partner_alternate_mode)

		op_mode = OP_MODE_DP;

	else
@@ -534,6 +546,33 @@ static int ssusb_redriver_ucsi_notifier(struct notifier_block *nb, 
	return NOTIFY_OK;

}



int redriver_release_usb_lanes(struct device_node *node)

{

	struct ssusb_redriver *redriver;

	struct i2c_client *client;



	if (!node)

		return -EINVAL;



	client = of_find_i2c_device_by_node(node);

	if (!client)

		return -EINVAL;



	redriver = i2c_get_clientdata(client);



	if (redriver->op_mode == OP_MODE_DP)

		return 0;



	dev_dbg(redriver->dev, "display notify 4 lane mode\n");

	redriver->op_mode = OP_MODE_DP;



	ssusb_redriver_channel_update(redriver);

	ssusb_redriver_gen_dev_set(redriver);



	return 0;

}

EXPORT_SYMBOL(redriver_release_usb_lanes);



static void ssusb_redriver_orientation_gpio_init(

		struct ssusb_redriver *redriver)

{

include/linux/usb/redriver.h

0 → 100644
+22 −0
Original line number Diff line number Diff line 
/* SPDX-License-Identifier: GPL-2.0-only */

/*

 * Copyright (c) 2020, The Linux Foundation. All rights reserved.

 */



#ifndef __LINUX_USB_REDRIVER_H

#define __LINUX_USB_REDRIVER_H



#ifdef CONFIG_USB_REDRIVER



int redriver_release_usb_lanes(struct device_node *node);



#else



static inline int redriver_release_usb_lanes(struct device_node *node)

{

	return 0;

}



#endif



#endif /*__LINUX_USB_REDRIVER_H */