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usb: ucsi: huawei_gaokun: support mode switching

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The USB PHY (QMP Combo PHY) is always initialized in USB3+DP mode. In
the past, there was no MUX, and it was unnecessary to set it, since
MSM only supported 2-lane DP. But now, MST and 4-lane DP support has
been added to MSM, and a MUX has been added to the PHY. To support
4-lane DP and mode switching for gaokun, get the MUX and set it.

Signed-off-by: Pengyu Luo <mitltlatltl@gmail.com>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260607101844.820064-1-mitltlatltl@gmail.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Pengyu Luo
2026-06-07 18:18:44 +08:00
committed by Greg Kroah-Hartman
parent 7b4456767f
commit 1c2b66a7d7
1 changed files with 40 additions and 13 deletions
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53
drivers/usb/typec/ucsi/ucsi_huawei_gaokun.c
View File

@@ -18,6 +18,7 @@
#include <linux/usb/pd_vdo.h>
#include <linux/usb/typec_altmode.h>
#include <linux/usb/typec_dp.h>
#include <linux/usb/typec_mux.h>
#include <linux/workqueue_types.h>
#include "ucsi.h"
@@ -82,6 +83,8 @@ struct gaokun_ucsi_port {
struct gaokun_ucsi *ucsi;
struct auxiliary_device *bridge;
struct typec_mux *typec_mux;
int idx;
enum gaokun_ucsi_ccx ccx;
enum gaokun_ucsi_mux mux;
@@ -226,19 +229,18 @@ static void gaokun_ucsi_port_update(struct gaokun_ucsi_port *port,
port->hpd_state = FIELD_GET(GAOKUN_HPD_STATE_MASK, ddi);
port->hpd_irq = FIELD_GET(GAOKUN_HPD_IRQ_MASK, ddi);
/* Mode and SVID are unused; keeping them to make things clearer */
switch (port->mode) {
case USBC_DPAM_PAN_C:
case USBC_DPAM_PAN_C_REVERSE:
port->mode = DP_PIN_ASSIGN_C; /* correct it for usb later */
port->mode = TYPEC_DP_STATE_C; /* correct it for usb later */
break;
case USBC_DPAM_PAN_D:
case USBC_DPAM_PAN_D_REVERSE:
port->mode = DP_PIN_ASSIGN_D;
port->mode = TYPEC_DP_STATE_D;
break;
case USBC_DPAM_PAN_E:
case USBC_DPAM_PAN_E_REVERSE:
port->mode = DP_PIN_ASSIGN_E;
port->mode = TYPEC_DP_STATE_E;
break;
case USBC_DPAM_PAN_NONE:
port->mode = TYPEC_STATE_SAFE;
@@ -287,18 +289,32 @@ static int gaokun_ucsi_refresh(struct gaokun_ucsi *uec)
return idx;
}
static void gaokun_ucsi_handle_altmode(struct gaokun_ucsi_port *port)
static void gaokun_ucsi_handle_usb_mode(struct gaokun_ucsi_port *port)
{
struct gaokun_ucsi *uec = port->ucsi;
int idx = port->idx;
struct typec_mux_state state = {};
struct typec_altmode dp_alt = {};
int idx = port->idx, ret;
if (idx >= uec->ucsi->cap.num_connectors) {
/*
* For every typec port on this platform, the only mode-switch is
* controlled by its qmp combo phy which consumes svid and mode only.
*/
dp_alt.svid = port->svid;
state.mode = port->mode;
state.alt = &dp_alt;
if (idx >= uec->num_ports) {
dev_warn(uec->dev, "altmode port out of range: %d\n", idx);
return;
}
ret = typec_mux_set(port->typec_mux, &state);
if (ret)
dev_err(uec->dev, "failed to set mux %d\n", ret);
/* UCSI callback .connector_status() have set orientation */
if (port->bridge)
if (port->bridge && port->svid == USB_TYPEC_DP_SID)
drm_aux_hpd_bridge_notify(&port->bridge->dev,
port->hpd_state ?
connector_status_connected :
@@ -307,7 +323,7 @@ static void gaokun_ucsi_handle_altmode(struct gaokun_ucsi_port *port)
gaokun_ec_ucsi_pan_ack(uec->ec, port->idx);
}
static void gaokun_ucsi_altmode_notify_ind(struct gaokun_ucsi *uec)
static void gaokun_ucsi_usb_notify_ind(struct gaokun_ucsi *uec)
{
int idx;
@@ -320,7 +336,7 @@ static void gaokun_ucsi_altmode_notify_ind(struct gaokun_ucsi *uec)
if (idx == GAOKUN_UCSI_NO_PORT_UPDATE)
gaokun_ec_ucsi_pan_ack(uec->ec, idx); /* ack directly if no update */
else
gaokun_ucsi_handle_altmode(&uec->ports[idx]);
gaokun_ucsi_handle_usb_mode(&uec->ports[idx]);
}
/*
@@ -352,7 +368,7 @@ static void gaokun_ucsi_handle_no_usb_event(struct gaokun_ucsi *uec, int idx)
port = &uec->ports[idx];
if (!wait_for_completion_timeout(&port->usb_ack, 2 * HZ)) {
dev_warn(uec->dev, "No USB EVENT, triggered by UCSI EVENT");
gaokun_ucsi_altmode_notify_ind(uec);
gaokun_ucsi_usb_notify_ind(uec);
}
}
@@ -366,7 +382,7 @@ static int gaokun_ucsi_notify(struct notifier_block *nb,
switch (action) {
case EC_EVENT_USB:
gaokun_ucsi_complete_usb_ack(uec);
gaokun_ucsi_altmode_notify_ind(uec);
gaokun_ucsi_usb_notify_ind(uec);
return NOTIFY_OK;
case EC_EVENT_UCSI:
@@ -429,8 +445,15 @@ static int gaokun_ucsi_ports_init(struct gaokun_ucsi *uec)
fwnode_handle_put(fwnode);
return PTR_ERR(ucsi_port->bridge);
}
}
ucsi_port->typec_mux = fwnode_typec_mux_get(fwnode);
if (IS_ERR(ucsi_port->typec_mux)) {
fwnode_handle_put(fwnode);
return dev_err_probe(dev, PTR_ERR(ucsi_port->typec_mux),
"failed to acquire mode-switch for port: %d\n",
port);
}
}
for (i = 0; i < num_ports; i++) {
if (!uec->ports[i].bridge)
continue;
@@ -502,10 +525,14 @@ static int gaokun_ucsi_probe(struct auxiliary_device *adev,
static void gaokun_ucsi_remove(struct auxiliary_device *adev)
{
struct gaokun_ucsi *uec = auxiliary_get_drvdata(adev);
int i;
disable_delayed_work_sync(&uec->work);
gaokun_ec_unregister_notify(uec->ec, &uec->nb);
ucsi_unregister(uec->ucsi);
for (i = 0; i < uec->num_ports; ++i)
typec_mux_put(uec->ports[i].typec_mux);
ucsi_destroy(uec->ucsi);
}