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usb: typec: ucsi: yoga-c630: handle USB / HPD messages to set port orientation

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Parse USB / HPD messages from EC in order to set the orientation of the
corresponding Type-C port, letting connected USB 3 devices to enjoy
SuperSpeed connection rather than beign limited to HighSpeed only (if
the orientation didn't match).

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20250621-c630-ucsi-v1-7-a86de5e11361@oss.qualcomm.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Dmitry Baryshkov
2025-06-21 21:13:02 +03:00
committed by Greg Kroah-Hartman
parent e943c93333
commit 49bf6ee89e
1 changed files with 42 additions and 0 deletions
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42
drivers/usb/typec/ucsi/ucsi_yoga_c630.c
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@@ -7,15 +7,25 @@
*/
#include <linux/auxiliary_bus.h>
#include <linux/bitops.h>
#include <linux/bitfield.h>
#include <linux/completion.h>
#include <linux/container_of.h>
#include <linux/module.h>
#include <linux/notifier.h>
#include <linux/string.h>
#include <linux/platform_data/lenovo-yoga-c630.h>
#include <linux/usb/typec_dp.h>
#include "ucsi.h"
#define LENOVO_EC_USB_MUX 0x08
#define USB_MUX_MUXC GENMASK(1, 0)
#define USB_MUX_CCST GENMASK(3, 2)
#define USB_MUX_DPPN GENMASK(7, 4)
#define USB_MUX_HPDS BIT(8)
#define USB_MUX_HSFL GENMASK(11, 9)
struct yoga_c630_ucsi {
struct yoga_c630_ec *ec;
struct ucsi *ucsi;
@@ -144,6 +154,12 @@ static bool yoga_c630_ucsi_update_altmodes(struct ucsi *ucsi,
return false;
}
static void yoga_c630_ucsi_update_connector(struct ucsi_connector *con)
{
if (con->num == 1)
con->typec_cap.orientation_aware = true;
}
static const struct ucsi_operations yoga_c630_ucsi_ops = {
.read_version = yoga_c630_ucsi_read_version,
.read_cci = yoga_c630_ucsi_read_cci,
@@ -152,8 +168,33 @@ static const struct ucsi_operations yoga_c630_ucsi_ops = {
.sync_control = yoga_c630_ucsi_sync_control,
.async_control = yoga_c630_ucsi_async_control,
.update_altmodes = yoga_c630_ucsi_update_altmodes,
.update_connector = yoga_c630_ucsi_update_connector,
};
static void yoga_c630_ucsi_read_port0_status(struct yoga_c630_ucsi *uec)
{
int val;
unsigned int muxc, ccst, dppn, hpds, hsfl;
val = yoga_c630_ec_read16(uec->ec, LENOVO_EC_USB_MUX);
muxc = FIELD_GET(USB_MUX_MUXC, val);
ccst = FIELD_GET(USB_MUX_CCST, val);
dppn = FIELD_GET(USB_MUX_DPPN, val);
hpds = FIELD_GET(USB_MUX_HPDS, val);
hsfl = FIELD_GET(USB_MUX_HSFL, val);
dev_dbg(uec->ucsi->dev, " mux %04x (muxc %d ccst %d dppn %d hpds %d hsfl %d)\n",
val,
muxc, ccst, dppn, hpds, hsfl);
if (uec->ucsi->connector && uec->ucsi->connector[0].port)
typec_set_orientation(uec->ucsi->connector[0].port,
ccst == 1 ?
TYPEC_ORIENTATION_REVERSE :
TYPEC_ORIENTATION_NORMAL);
}
static int yoga_c630_ucsi_notify(struct notifier_block *nb,
unsigned long action, void *data)
{
@@ -164,6 +205,7 @@ static int yoga_c630_ucsi_notify(struct notifier_block *nb,
switch (action) {
case LENOVO_EC_EVENT_USB:
case LENOVO_EC_EVENT_HPD:
yoga_c630_ucsi_read_port0_status(uec);
ucsi_connector_change(uec->ucsi, 1);
return NOTIFY_OK;