// SPDX-License-Identifier: GPL-2.0
/*
* USB Typec-C DisplayPort Alternate Mode driver
*
* Copyright (C) 2018 Intel Corporation
* Author: Heikki Krogerus <[email protected]>
*
* DisplayPort is trademark of VESA (www.vesa.org)
*/
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/usb/pd_vdo.h>
#include <linux/usb/typec_dp.h>
#include <drm/drm_connector.h>
#include "displayport.h"
#define DP_HEADER(_dp, ver, cmd) (VDO((_dp)->alt->svid, 1, ver, cmd) \
| VDO_OPOS(USB_TYPEC_DP_MODE))
enum {
DP_CONF_USB,
DP_CONF_DFP_D,
DP_CONF_UFP_D,
DP_CONF_DUAL_D,
};
/* Pin assignments that use USB3.1 Gen2 signaling to carry DP protocol */
#define DP_PIN_ASSIGN_GEN2_BR_MASK (BIT(DP_PIN_ASSIGN_A) | \
BIT(DP_PIN_ASSIGN_B))
/* Pin assignments that use DP v1.3 signaling to carry DP protocol */
#define DP_PIN_ASSIGN_DP_BR_MASK (BIT(DP_PIN_ASSIGN_C) | \
BIT(DP_PIN_ASSIGN_D) | \
BIT(DP_PIN_ASSIGN_E) | \
BIT(DP_PIN_ASSIGN_F))
/* DP only pin assignments */
#define DP_PIN_ASSIGN_DP_ONLY_MASK (BIT(DP_PIN_ASSIGN_A) | \
BIT(DP_PIN_ASSIGN_C) | \
BIT(DP_PIN_ASSIGN_E))
/* Pin assignments where one channel is for USB */
#define DP_PIN_ASSIGN_MULTI_FUNC_MASK (BIT(DP_PIN_ASSIGN_B) | \
BIT(DP_PIN_ASSIGN_D) | \
BIT(DP_PIN_ASSIGN_F))
enum dp_state {
DP_STATE_IDLE,
DP_STATE_ENTER,
DP_STATE_ENTER_PRIME,
DP_STATE_UPDATE,
DP_STATE_CONFIGURE,
DP_STATE_CONFIGURE_PRIME,
DP_STATE_EXIT,
DP_STATE_EXIT_PRIME,
};
struct dp_altmode {
struct typec_displayport_data data;
struct typec_displayport_data data_prime;
enum dp_state state;
bool hpd;
bool pending_hpd;
struct mutex lock; /* device lock */
struct work_struct work;
struct typec_altmode *alt;
const struct typec_altmode *port;
struct fwnode_handle *connector_fwnode;
struct typec_altmode *plug_prime;
};
static int dp_altmode_notify(struct dp_altmode *dp)
{
unsigned long conf;
u8 state;
if (dp->data.conf) {
state = get_count_order(DP_CONF_GET_PIN_ASSIGN(dp->data.conf));
conf = TYPEC_MODAL_STATE(state);
} else {
conf = TYPEC_STATE_USB;
}
return typec_altmode_notify(dp->alt, conf, &dp->data);
}
static int dp_altmode_configure(struct dp_altmode *dp, u8 con)
{
u8 pin_assign = 0;
u32 conf;
/* DP Signalling */
conf = (dp->data.conf & DP_CONF_SIGNALLING_MASK) >> DP_CONF_SIGNALLING_SHIFT;
switch (con) {
case DP_STATUS_CON_DISABLED:
return 0;
case DP_STATUS_CON_DFP_D:
conf |= DP_CONF_UFP_U_AS_DFP_D;
pin_assign = DP_CAP_UFP_D_PIN_ASSIGN(dp->alt->vdo) &
DP_CAP_DFP_D_PIN_ASSIGN(dp->port->vdo);
/* Account for active cable capabilities */
if (dp->plug_prime)
pin_assign &= DP_CAP_DFP_D_PIN_ASSIGN(dp->plug_prime->vdo);
break;
case DP_STATUS_CON_UFP_D:
case DP_STATUS_CON_BOTH: /* NOTE: First acting as DP source */
conf |= DP_CONF_UFP_U_AS_UFP_D;
pin_assign = DP_CAP_PIN_ASSIGN_UFP_D(dp->alt->vdo) &
DP_CAP_PIN_ASSIGN_DFP_D(dp->port->vdo);
/* Account for active cable capabilities */
if (dp->plug_prime)
pin_assign &= DP_CAP_UFP_D_PIN_ASSIGN(dp->plug_prime->vdo);
break;
default:
break;
}
/* Determining the initial pin assignment. */
if (!DP_CONF_GET_PIN_ASSIGN(dp->data.conf)) {
/* Is USB together with DP preferred */
if (dp->data.status & DP_STATUS_PREFER_MULTI_FUNC &&
pin_assign & DP_PIN_ASSIGN_MULTI_FUNC_MASK)
pin_assign &= DP_PIN_ASSIGN_MULTI_FUNC_MASK;
else if (pin_assign & DP_PIN_ASSIGN_DP_ONLY_MASK) {
pin_assign &= DP_PIN_ASSIGN_DP_ONLY_MASK;
/* Default to pin assign C if available */
if (pin_assign & BIT(DP_PIN_ASSIGN_C))
pin_assign = BIT(DP_PIN_ASSIGN_C);
}
if (!pin_assign)
return -EINVAL;
conf |= DP_CONF_SET_PIN_ASSIGN(pin_assign);
}
dp->data.conf = conf;
if (dp->plug_prime)
dp->data_prime.conf = conf;
return 0;
}
static int dp_altmode_status_update(struct dp_altmode *dp)
{
bool configured = !!DP_CONF_GET_PIN_ASSIGN(dp->data.conf);
bool hpd = !!(dp->data.status & DP_STATUS_HPD_STATE);
u8 con = DP_STATUS_CONNECTION(dp->data.status);
int ret = 0;
if (configured && (dp->data.status & DP_STATUS_SWITCH_TO_USB)) {
dp->data.conf = 0;
dp->data_prime.conf = 0;
dp->state = dp->plug_prime ? DP_STATE_CONFIGURE_PRIME :
DP_STATE_CONFIGURE;
} else if (dp->data.status & DP_STATUS_EXIT_DP_MODE) {
dp->state = DP_STATE_EXIT;
} else if (!(con & DP_CONF_CURRENTLY(dp->data.conf))) {
ret = dp_altmode_configure(dp, con);
if (!ret) {
dp->state = dp->plug_prime ? DP_STATE_CONFIGURE_PRIME :
DP_STATE_CONFIGURE;
if (dp->hpd != hpd) {
dp->hpd = hpd;
dp->pending_hpd = true;
}
}
} else {
drm_connector_oob_hotplug_event(dp->connector_fwnode,
hpd ? connector_status_connected :
connector_status_disconnected);
dp->hpd = hpd;
sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd");
}
return ret;
}
static int dp_altmode_configured(struct dp_altmode *dp)
{
sysfs_notify(&dp->alt->dev.kobj, "displayport", "configuration");
sysfs_notify(&dp->alt->dev.kobj, "displayport", "pin_assignment");
/*
* If the DFP_D/UFP_D sends a change in HPD when first notifying the
* DisplayPort driver that it is connected, then we wait until
* configuration is complete to signal HPD.
*/
if (dp->pending_hpd) {
drm_connector_oob_hotplug_event(dp->connector_fwnode,
connector_status_connected);
sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd");
dp->pending_hpd = false;
}
return dp_altmode_notify(dp);
}
static int dp_altmode_configure_vdm(struct dp_altmode *dp, u32 conf)
{
int svdm_version = typec_altmode_get_svdm_version(dp->alt);
u32 header;
int ret;
if (svdm_version < 0)
return svdm_version;
header = DP_HEADER(dp, svdm_version, DP_CMD_CONFIGURE);
ret = typec_altmode_notify(dp->alt, TYPEC_STATE_SAFE, &dp->data);
if (ret) {
dev_err(&dp->alt->dev,
"unable to put to connector to safe mode\n");
return ret;
}
ret = typec_altmode_vdm(dp->alt, header, &conf, 2);
if (ret)
dp_altmode_notify(dp);
return ret;
}
static int dp_altmode_configure_vdm_cable(struct dp_altmode *dp, u32 conf)
{
int svdm_version = typec_altmode_get_cable_svdm_version(dp->plug_prime);
u32 header;
if (svdm_version < 0)
return svdm_version;
header = DP_HEADER(dp, svdm_version, DP_CMD_CONFIGURE);
return typec_cable_altmode_vdm(dp->plug_prime, TYPEC_PLUG_SOP_P, header, &conf, 2);
}
static void dp_altmode_work(struct work_struct *work)
{
struct dp_altmode *dp = container_of(work, struct dp_altmode, work);
int svdm_version;
u32 header;
u32 vdo;
int ret;
mutex_lock(&dp->lock);
switch (dp->state) {
case DP_STATE_ENTER:
ret = typec_altmode_enter(dp->alt, NULL);
if (ret && ret != -EBUSY)
dev_err(&dp->alt->dev, "failed to enter mode\n");
break;
case DP_STATE_ENTER_PRIME:
ret = typec_cable_altmode_enter(dp->alt, TYPEC_PLUG_SOP_P, NULL);
/*
* If we fail to enter Alt Mode on SOP', then we should drop the
* plug from the driver and attempt to run the driver without
* it.
*/
if (ret && ret != -EBUSY) {
dev_err(&dp->alt->dev, "plug failed to enter mode\n");
dp->state = DP_STATE_ENTER;
goto disable_prime;
}
break;
case DP_STATE_UPDATE:
svdm_version = typec_altmode_get_svdm_version(dp->alt);
if (svdm_version < 0)
break;
header = DP_HEADER(dp, svdm_version, DP_CMD_STATUS_UPDATE);
vdo = 1;
ret = typec_altmode_vdm(dp->alt, header, &vdo, 2);
if (ret)
dev_err(&dp->alt->dev,
"unable to send Status Update command (%d)\n",
ret);
break;
case DP_STATE_CONFIGURE:
ret = dp_altmode_configure_vdm(dp, dp->data.conf);
if (ret)
dev_err(&dp->alt->dev,
"unable to send Configure command (%d)\n", ret);
break;
case DP_STATE_CONFIGURE_PRIME:
ret = dp_altmode_configure_vdm_cable(dp, dp->data_prime.conf);
if (ret) {
dev_err(&dp->plug_prime->dev,
"unable to send Configure command (%d)\n",
ret);
dp->state = DP_STATE_CONFIGURE;
goto disable_prime;
}
break;
case DP_STATE_EXIT:
if (typec_altmode_exit(dp->alt))
dev_err(&dp->alt->dev, "Exit Mode Failed!\n");
break;
case DP_STATE_EXIT_PRIME:
if (typec_cable_altmode_exit(dp->plug_prime, TYPEC_PLUG_SOP_P))
dev_err(&dp->plug_prime->dev, "Exit Mode Failed!\n");
break;
default:
break;
}
dp->state = DP_STATE_IDLE;
mutex_unlock(&dp->lock);
return;
disable_prime:
typec_altmode_put_plug(dp->plug_prime);
dp->plug_prime = NULL;
schedule_work(&dp->work);
mutex_unlock(&dp->lock);
}
static void dp_altmode_attention(struct typec_altmode *alt, const u32 vdo)
{
struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
u8 old_state;
mutex_lock(&dp->lock);
old_state = dp->state;
dp->data.status = vdo;
if (old_state != DP_STATE_IDLE)
dev_warn(&alt->dev, "ATTENTION while processing state %d\n",
old_state);
if (dp_altmode_status_update(dp))
dev_warn(&alt->dev, "%s: status update failed\n", __func__);
if (dp_altmode_notify(dp))
dev_err(&alt->dev, "%s: notification failed\n", __func__);
if (old_state == DP_STATE_IDLE && dp->state != DP_STATE_IDLE)
schedule_work(&dp->work);
mutex_unlock(&dp->lock);
}
static int dp_altmode_vdm(struct typec_altmode *alt,
const u32 hdr, const u32 *vdo, int count)
{
struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
int cmd_type = PD_VDO_CMDT(hdr);
int cmd = PD_VDO_CMD(hdr);
int ret = 0;
mutex_lock(&dp->lock);
if (dp->state != DP_STATE_IDLE) {
ret = -EBUSY;
goto err_unlock;
}
switch (cmd_type) {
case CMDT_RSP_ACK:
switch (cmd) {
case CMD_ENTER_MODE:
typec_altmode_update_active(alt, true);
dp->state = DP_STATE_UPDATE;
break;
case CMD_EXIT_MODE:
typec_altmode_update_active(alt, false);
dp->data.status = 0;
dp->data.conf = 0;
if (dp->hpd) {
drm_connector_oob_hotplug_event(dp->connector_fwnode,
connector_status_disconnected);
dp->hpd = false;
sysfs_notify(&dp->alt->dev.kobj, "displayport", "hpd");
}
if (dp->plug_prime)
dp->state = DP_STATE_EXIT_PRIME;
break;
case DP_CMD_STATUS_UPDATE:
dp->data.status = *vdo;
ret = dp_altmode_status_update(dp);
break;
case DP_CMD_CONFIGURE:
ret = dp_altmode_configured(dp);
break;
default:
break;
}
break;
case CMDT_RSP_NAK:
switch (cmd) {
case DP_CMD_CONFIGURE:
dp->data.conf = 0;
ret = dp_altmode_configured(dp);
break;
default:
break;
}
break;
default:
break;
}
if (dp->state != DP_STATE_IDLE)
schedule_work(&dp->work);
err_unlock:
mutex_unlock(&dp->lock);
return ret;
}
static int dp_cable_altmode_vdm(struct typec_altmode *alt, enum typec_plug_index sop,
const u32 hdr, const u32 *vdo, int count)
{
struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
int cmd_type = PD_VDO_CMDT(hdr);
int cmd = PD_VDO_CMD(hdr);
int ret = 0;
mutex_lock(&dp->lock);
if (dp->state != DP_STATE_IDLE) {
ret = -EBUSY;
goto err_unlock;
}
switch (cmd_type) {
case CMDT_RSP_ACK:
switch (cmd) {
case CMD_ENTER_MODE:
typec_altmode_update_active(dp->plug_prime, true);
dp->state = DP_STATE_ENTER;
break;
case CMD_EXIT_MODE:
dp->data_prime.status = 0;
dp->data_prime.conf = 0;
typec_altmode_update_active(dp->plug_prime, false);
break;
case DP_CMD_CONFIGURE:
dp->state = DP_STATE_CONFIGURE;
break;
default:
break;
}
break;
case CMDT_RSP_NAK:
switch (cmd) {
case DP_CMD_CONFIGURE:
dp->data_prime.conf = 0;
/* Attempt to configure on SOP, drop plug */
typec_altmode_put_plug(dp->plug_prime);
dp->plug_prime = NULL;
dp->state = DP_STATE_CONFIGURE;
break;
default:
break;
}
break;
default:
break;
}
if (dp->state != DP_STATE_IDLE)
schedule_work(&dp->work);
err_unlock:
mutex_unlock(&dp->lock);
return ret;
}
static int dp_altmode_activate(struct typec_altmode *alt, int activate)
{
struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
int ret;
if (activate) {
if (dp->plug_prime) {
ret = typec_cable_altmode_enter(alt, TYPEC_PLUG_SOP_P, NULL);
if (ret < 0) {
typec_altmode_put_plug(dp->plug_prime);
dp->plug_prime = NULL;
} else {
return ret;
}
}
return typec_altmode_enter(alt, NULL);
} else {
return typec_altmode_exit(alt);
}
}
static const struct typec_altmode_ops dp_altmode_ops = {
.attention = dp_altmode_attention,
.vdm = dp_altmode_vdm,
.activate = dp_altmode_activate,
};
static const struct typec_cable_ops dp_cable_ops = {
.vdm = dp_cable_altmode_vdm,
};
static const char * const configurations[] = {
[DP_CONF_USB] = "USB",
[DP_CONF_DFP_D] = "source",
[DP_CONF_UFP_D] = "sink",
};
static ssize_t
configuration_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct dp_altmode *dp = dev_get_drvdata(dev);
u32 conf;
u32 cap;
int con;
int ret = 0;
con = sysfs_match_string(configurations, buf);
if (con < 0)
return con;
mutex_lock(&dp->lock);
if (dp->state != DP_STATE_IDLE) {
ret = -EBUSY;
goto err_unlock;
}
cap = DP_CAP_CAPABILITY(dp->alt->vdo);
if ((con == DP_CONF_DFP_D && !(cap & DP_CAP_DFP_D)) ||
(con == DP_CONF_UFP_D && !(cap & DP_CAP_UFP_D))) {
ret = -EINVAL;
goto err_unlock;
}
conf = dp->data.conf & ~DP_CONF_DUAL_D;
conf |= con;
if (dp->alt->active) {
ret = dp_altmode_configure_vdm(dp, conf);
if (ret)
goto err_unlock;
}
dp->data.conf = conf;
err_unlock:
mutex_unlock(&dp->lock);
return ret ? ret : size;
}
static ssize_t configuration_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dp_altmode *dp = dev_get_drvdata(dev);
int len;
u8 cap;
u8 cur;
int i;
mutex_lock(&dp->lock);
cap = DP_CAP_CAPABILITY(dp->alt->vdo);
cur = DP_CONF_CURRENTLY(dp->data.conf);
len = sprintf(buf, "%s ", cur ? "USB" : "[USB]");
for (i = 1; i < ARRAY_SIZE(configurations); i++) {
if (i == cur)
len += sprintf(buf + len, "[%s] ", configurations[i]);
else if ((i == DP_CONF_DFP_D && cap & DP_CAP_DFP_D) ||
(i == DP_CONF_UFP_D && cap & DP_CAP_UFP_D))
len += sprintf(buf + len, "%s ", configurations[i]);
}
mutex_unlock(&dp->lock);
buf[len - 1] = '\n';
return len;
}
static DEVICE_ATTR_RW(configuration);
static const char * const pin_assignments[] = {
[DP_PIN_ASSIGN_A] = "A",
[DP_PIN_ASSIGN_B] = "B",
[DP_PIN_ASSIGN_C] = "C",
[DP_PIN_ASSIGN_D] = "D",
[DP_PIN_ASSIGN_E] = "E",
[DP_PIN_ASSIGN_F] = "F",
};
/*
* Helper function to extract a peripheral's currently supported
* Pin Assignments from its DisplayPort alternate mode state.
*/
static u8 get_current_pin_assignments(struct dp_altmode *dp)
{
if (DP_CONF_CURRENTLY(dp->data.conf) == DP_CONF_UFP_U_AS_DFP_D)
return DP_CAP_PIN_ASSIGN_DFP_D(dp->alt->vdo);
else
return DP_CAP_PIN_ASSIGN_UFP_D(dp->alt->vdo);
}
static ssize_t
pin_assignment_store(struct device *dev, struct device_attribute *attr,
const char *buf, size_t size)
{
struct dp_altmode *dp = dev_get_drvdata(dev);
u8 assignments;
u32 conf;
int ret;
ret = sysfs_match_string(pin_assignments, buf);
if (ret < 0)
return ret;
conf = DP_CONF_SET_PIN_ASSIGN(BIT(ret));
ret = 0;
mutex_lock(&dp->lock);
if (conf & dp->data.conf)
goto out_unlock;
if (dp->state != DP_STATE_IDLE) {
ret = -EBUSY;
goto out_unlock;
}
assignments = get_current_pin_assignments(dp);
if (!(DP_CONF_GET_PIN_ASSIGN(conf) & assignments)) {
ret = -EINVAL;
goto out_unlock;
}
conf |= dp->data.conf & ~DP_CONF_PIN_ASSIGNEMENT_MASK;
/* Only send Configure command if a configuration has been set */
if (dp->alt->active && DP_CONF_CURRENTLY(dp->data.conf)) {
/* todo: send manual configure over SOP'*/
ret = dp_altmode_configure_vdm(dp, conf);
if (ret)
goto out_unlock;
}
dp->data.conf = conf;
out_unlock:
mutex_unlock(&dp->lock);
return ret ? ret : size;
}
static ssize_t pin_assignment_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
struct dp_altmode *dp = dev_get_drvdata(dev);
u8 assignments;
int len = 0;
u8 cur;
int i;
mutex_lock(&dp->lock);
cur = get_count_order(DP_CONF_GET_PIN_ASSIGN(dp->data.conf));
assignments = get_current_pin_assignments(dp);
for (i = 0; assignments; assignments >>= 1, i++) {
if (assignments & 1) {
if (i == cur)
len += sprintf(buf + len, "[%s] ",
pin_assignments[i]);
else
len += sprintf(buf + len, "%s ",
pin_assignments[i]);
}
}
mutex_unlock(&dp->lock);
/* get_current_pin_assignments can return 0 when no matching pin assignments are found */
if (len == 0)
len++;
buf[len - 1] = '\n';
return len;
}
static DEVICE_ATTR_RW(pin_assignment);
static ssize_t hpd_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct dp_altmode *dp = dev_get_drvdata(dev);
return sysfs_emit(buf, "%d\n", dp->hpd);
}
static DEVICE_ATTR_RO(hpd);
static struct attribute *displayport_attrs[] = {
&dev_attr_configuration.attr,
&dev_attr_pin_assignment.attr,
&dev_attr_hpd.attr,
NULL
};
static const struct attribute_group displayport_group = {
.name = "displayport",
.attrs = displayport_attrs,
};
static const struct attribute_group *displayport_groups[] = {
&displayport_group,
NULL,
};
int dp_altmode_probe(struct typec_altmode *alt)
{
const struct typec_altmode *port = typec_altmode_get_partner(alt);
struct typec_altmode *plug = typec_altmode_get_plug(alt, TYPEC_PLUG_SOP_P);
struct fwnode_handle *fwnode;
struct dp_altmode *dp;
/* FIXME: Port can only be DFP_U. */
/* Make sure we have compatiple pin configurations */
if (!(DP_CAP_PIN_ASSIGN_DFP_D(port->vdo) &
DP_CAP_PIN_ASSIGN_UFP_D(alt->vdo)) &&
!(DP_CAP_PIN_ASSIGN_UFP_D(port->vdo) &
DP_CAP_PIN_ASSIGN_DFP_D(alt->vdo)))
return -ENODEV;
dp = devm_kzalloc(&alt->dev, sizeof(*dp), GFP_KERNEL);
if (!dp)
return -ENOMEM;
INIT_WORK(&dp->work, dp_altmode_work);
mutex_init(&dp->lock);
dp->port = port;
dp->alt = alt;
alt->desc = "DisplayPort";
typec_altmode_set_ops(alt, &dp_altmode_ops);
if (plug) {
plug->desc = "Displayport";
plug->cable_ops = &dp_cable_ops;
}
dp->plug_prime = plug;
fwnode = dev_fwnode(alt->dev.parent->parent); /* typec_port fwnode */
if (fwnode_property_present(fwnode, "displayport"))
dp->connector_fwnode = fwnode_find_reference(fwnode, "displayport", 0);
else
dp->connector_fwnode = fwnode_handle_get(fwnode); /* embedded DP */
if (IS_ERR(dp->connector_fwnode))
dp->connector_fwnode = NULL;
typec_altmode_set_drvdata(alt, dp);
if (plug)
typec_altmode_set_drvdata(plug, dp);
dp->state = plug ? DP_STATE_ENTER_PRIME : DP_STATE_ENTER;
schedule_work(&dp->work);
return 0;
}
EXPORT_SYMBOL_GPL(dp_altmode_probe);
void dp_altmode_remove(struct typec_altmode *alt)
{
struct dp_altmode *dp = typec_altmode_get_drvdata(alt);
cancel_work_sync(&dp->work);
typec_altmode_put_plug(dp->plug_prime);
if (dp->connector_fwnode) {
drm_connector_oob_hotplug_event(dp->connector_fwnode,
connector_status_disconnected);
fwnode_handle_put(dp->connector_fwnode);
}
}
EXPORT_SYMBOL_GPL(dp_altmode_remove);
static const struct typec_device_id dp_typec_id[] = {
{ USB_TYPEC_DP_SID, USB_TYPEC_DP_MODE },
{ },
};
MODULE_DEVICE_TABLE(typec, dp_typec_id);
static struct typec_altmode_driver dp_altmode_driver = {
.id_table = dp_typec_id,
.probe = dp_altmode_probe,
.remove = dp_altmode_remove,
.driver = {
.name = "typec_displayport",
.dev_groups = displayport_groups,
},
};
module_typec_altmode_driver(dp_altmode_driver);
MODULE_AUTHOR("Heikki Krogerus <[email protected]>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("DisplayPort Alternate Mode");
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