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Commit f32e0241 authored by Philipp Jungkamp's avatar Philipp Jungkamp Committed by Hans de Goede
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platform/x86: ideapad-laptop: support for more special keys in WMI 

The event data of the WMI event 0xD0, which is assumed to be the
fn_lock, is used to indicate several special keys on newer Yoga 7/9
laptops.

The notify_id 0xD0 is non-unique in the DSDT of the Yoga 9 14IAP7, this
causes wmi_get_event_data() to report wrong values.
Port the ideapad-laptop WMI code to the wmi bus infrastructure which
does not suffer from the shortcomings of wmi_get_event_data().
Signed-off-by: default avatarPhilipp Jungkamp <p.jungkamp@gmx.net>
Link: https://lore.kernel.org/r/20221116110647.3438-1-p.jungkamp@gmx.netReviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent be5dd7d8
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Showing with 202 additions and 59 deletions
drivers/platform/x86/ideapad-laptop.c
View file @ f32e0241
......@@ -30,6 +30,7 @@
#include <linux/seq_file.h>
#include <linux/sysfs.h>
#include <linux/types.h>
#include <linux/wmi.h>
#include <acpi/video.h>
......@@ -37,14 +38,6 @@
#define IDEAPAD_RFKILL_DEV_NUM 3
#if IS_ENABLED(CONFIG_ACPI_WMI)
static const char *const ideapad_wmi_fnesc_events[] = {
"26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", /* Yoga 3 */
"56322276-8493-4CE8-A783-98C991274F5E", /* Yoga 700 */
"8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", /* Legion 5 */
};
#endif
enum {
CFG_CAP_BT_BIT = 16,
CFG_CAP_3G_BIT = 17,
......@@ -141,7 +134,6 @@ struct ideapad_private {
struct ideapad_dytc_priv *dytc;
struct dentry *debug;
unsigned long cfg;
const char *fnesc_guid;
struct {
bool conservation_mode : 1;
bool dytc : 1;
......@@ -182,6 +174,42 @@ MODULE_PARM_DESC(set_fn_lock_led,
"Enable driver based updates of the fn-lock LED on fn-lock changes. "
"If you need this please report this to: platform-driver-x86@vger.kernel.org");
/*
* shared data
*/
static struct ideapad_private *ideapad_shared;
static DEFINE_MUTEX(ideapad_shared_mutex);
static int ideapad_shared_init(struct ideapad_private *priv)
{
int ret;
mutex_lock(&ideapad_shared_mutex);
if (!ideapad_shared) {
ideapad_shared = priv;
ret = 0;
} else {
dev_warn(&priv->adev->dev, "found multiple platform devices\n");
ret = -EINVAL;
}
mutex_unlock(&ideapad_shared_mutex);
return ret;
}
static void ideapad_shared_exit(struct ideapad_private *priv)
{
mutex_lock(&ideapad_shared_mutex);
if (ideapad_shared == priv)
ideapad_shared = NULL;
mutex_unlock(&ideapad_shared_mutex);
}
/*
* ACPI Helpers
*/
......@@ -1110,6 +1138,8 @@ static void ideapad_sysfs_exit(struct ideapad_private *priv)
/*
* input device
*/
#define IDEAPAD_WMI_KEY 0x100
static const struct key_entry ideapad_keymap[] = {
{ KE_KEY, 6, { KEY_SWITCHVIDEOMODE } },
{ KE_KEY, 7, { KEY_CAMERA } },
......@@ -1123,6 +1153,28 @@ static const struct key_entry ideapad_keymap[] = {
{ KE_KEY, 66, { KEY_TOUCHPAD_OFF } },
{ KE_KEY, 67, { KEY_TOUCHPAD_ON } },
{ KE_KEY, 128, { KEY_ESC } },
/*
* WMI keys
*/
/* FnLock (handled by the firmware) */
{ KE_IGNORE, 0x02 | IDEAPAD_WMI_KEY },
/* Esc (handled by the firmware) */
{ KE_IGNORE, 0x03 | IDEAPAD_WMI_KEY },
/* Customizable Lenovo Hotkey ("star" with 'S' inside) */
{ KE_KEY, 0x01 | IDEAPAD_WMI_KEY, { KEY_FAVORITES } },
/* Dark mode toggle */
{ KE_KEY, 0x13 | IDEAPAD_WMI_KEY, { KEY_PROG1 } },
/* Sound profile switch */
{ KE_KEY, 0x12 | IDEAPAD_WMI_KEY, { KEY_PROG2 } },
/* Lenovo Virtual Background application */
{ KE_KEY, 0x28 | IDEAPAD_WMI_KEY, { KEY_PROG3 } },
/* Lenovo Support */
{ KE_KEY, 0x27 | IDEAPAD_WMI_KEY, { KEY_HELP } },
/* Refresh Rate Toggle */
{ KE_KEY, 0x0a | IDEAPAD_WMI_KEY, { KEY_DISPLAYTOGGLE } },
{ KE_END },
};
......@@ -1526,33 +1578,6 @@ static void ideapad_acpi_notify(acpi_handle handle, u32 event, void *data)
}
}
#if IS_ENABLED(CONFIG_ACPI_WMI)
static void ideapad_wmi_notify(u32 value, void *context)
{
struct ideapad_private *priv = context;
unsigned long result;
switch (value) {
case 128:
ideapad_input_report(priv, value);
break;
case 208:
if (!priv->features.set_fn_lock_led)
break;
if (!eval_hals(priv->adev->handle, &result)) {
bool state = test_bit(HALS_FNLOCK_STATE_BIT, &result);
exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
}
break;
default:
dev_info(&priv->platform_device->dev,
"Unknown WMI event: %u\n", value);
}
}
#endif
/* On some models we need to call exec_sals(SALS_FNLOCK_ON/OFF) to set the LED */
static const struct dmi_system_id set_fn_lock_led_list[] = {
{
......@@ -1643,6 +1668,118 @@ static void ideapad_check_features(struct ideapad_private *priv)
}
}
#if IS_ENABLED(CONFIG_ACPI_WMI)
/*
* WMI driver
*/
enum ideapad_wmi_event_type {
IDEAPAD_WMI_EVENT_ESC,
IDEAPAD_WMI_EVENT_FN_KEYS,
};
struct ideapad_wmi_private {
enum ideapad_wmi_event_type event;
};
static int ideapad_wmi_probe(struct wmi_device *wdev, const void *context)
{
struct ideapad_wmi_private *wpriv;
wpriv = devm_kzalloc(&wdev->dev, sizeof(*wpriv), GFP_KERNEL);
if (!wpriv)
return -ENOMEM;
*wpriv = *(const struct ideapad_wmi_private *)context;
dev_set_drvdata(&wdev->dev, wpriv);
return 0;
}
static void ideapad_wmi_notify(struct wmi_device *wdev, union acpi_object *data)
{
struct ideapad_wmi_private *wpriv = dev_get_drvdata(&wdev->dev);
struct ideapad_private *priv;
unsigned long result;
mutex_lock(&ideapad_shared_mutex);
priv = ideapad_shared;
if (!priv)
goto unlock;
switch (wpriv->event) {
case IDEAPAD_WMI_EVENT_ESC:
ideapad_input_report(priv, 128);
break;
case IDEAPAD_WMI_EVENT_FN_KEYS:
if (priv->features.set_fn_lock_led &&
!eval_hals(priv->adev->handle, &result)) {
bool state = test_bit(HALS_FNLOCK_STATE_BIT, &result);
exec_sals(priv->adev->handle, state ? SALS_FNLOCK_ON : SALS_FNLOCK_OFF);
}
if (data->type != ACPI_TYPE_INTEGER) {
dev_warn(&wdev->dev,
"WMI event data is not an integer\n");
break;
}
dev_dbg(&wdev->dev, "WMI fn-key event: 0x%llx\n",
data->integer.value);
ideapad_input_report(priv,
data->integer.value | IDEAPAD_WMI_KEY);
break;
}
unlock:
mutex_unlock(&ideapad_shared_mutex);
}
static const struct ideapad_wmi_private ideapad_wmi_context_esc = {
.event = IDEAPAD_WMI_EVENT_ESC
};
static const struct ideapad_wmi_private ideapad_wmi_context_fn_keys = {
.event = IDEAPAD_WMI_EVENT_FN_KEYS
};
static const struct wmi_device_id ideapad_wmi_ids[] = {
{ "26CAB2E5-5CF1-46AE-AAC3-4A12B6BA50E6", &ideapad_wmi_context_esc }, /* Yoga 3 */
{ "56322276-8493-4CE8-A783-98C991274F5E", &ideapad_wmi_context_esc }, /* Yoga 700 */
{ "8FC0DE0C-B4E4-43FD-B0F3-8871711C1294", &ideapad_wmi_context_fn_keys }, /* Legion 5 */
{},
};
MODULE_DEVICE_TABLE(wmi, ideapad_wmi_ids);
static struct wmi_driver ideapad_wmi_driver = {
.driver = {
.name = "ideapad_wmi",
},
.id_table = ideapad_wmi_ids,
.probe = ideapad_wmi_probe,
.notify = ideapad_wmi_notify,
};
static int ideapad_wmi_driver_register(void)
{
return wmi_driver_register(&ideapad_wmi_driver);
}
static void ideapad_wmi_driver_unregister(void)
{
return wmi_driver_unregister(&ideapad_wmi_driver);
}
#else
static inline int ideapad_wmi_driver_register(void) { return 0; }
static inline void ideapad_wmi_driver_unregister(void) { }
#endif
/*
* ACPI driver
*/
static int ideapad_acpi_add(struct platform_device *pdev)
{
struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
......@@ -1724,30 +1861,16 @@ static int ideapad_acpi_add(struct platform_device *pdev)
goto notification_failed;
}
#if IS_ENABLED(CONFIG_ACPI_WMI)
for (i = 0; i < ARRAY_SIZE(ideapad_wmi_fnesc_events); i++) {
status = wmi_install_notify_handler(ideapad_wmi_fnesc_events[i],
ideapad_wmi_notify, priv);
if (ACPI_SUCCESS(status)) {
priv->fnesc_guid = ideapad_wmi_fnesc_events[i];
break;
}
}
if (ACPI_FAILURE(status) && status != AE_NOT_EXIST) {
err = -EIO;
goto notification_failed_wmi;
}
#endif
err = ideapad_shared_init(priv);
if (err)
goto shared_init_failed;
return 0;
#if IS_ENABLED(CONFIG_ACPI_WMI)
notification_failed_wmi:
shared_init_failed:
acpi_remove_notify_handler(priv->adev->handle,
ACPI_DEVICE_NOTIFY,
ideapad_acpi_notify);
#endif
notification_failed:
ideapad_backlight_exit(priv);
......@@ -1773,10 +1896,7 @@ static int ideapad_acpi_remove(struct platform_device *pdev)
struct ideapad_private *priv = dev_get_drvdata(&pdev->dev);
int i;
#if IS_ENABLED(CONFIG_ACPI_WMI)
if (priv->fnesc_guid)
wmi_remove_notify_handler(priv->fnesc_guid);
#endif
ideapad_shared_exit(priv);
acpi_remove_notify_handler(priv->adev->handle,
ACPI_DEVICE_NOTIFY,
......@@ -1828,7 +1948,30 @@ static struct platform_driver ideapad_acpi_driver = {
},
};
module_platform_driver(ideapad_acpi_driver);
static int __init ideapad_laptop_init(void)
{
int err;
err = ideapad_wmi_driver_register();
if (err)
return err;
err = platform_driver_register(&ideapad_acpi_driver);
if (err) {
ideapad_wmi_driver_unregister();
return err;
}
return 0;
}
module_init(ideapad_laptop_init)
static void __exit ideapad_laptop_exit(void)
{
ideapad_wmi_driver_unregister();
platform_driver_unregister(&ideapad_acpi_driver);
}
module_exit(ideapad_laptop_exit)
MODULE_AUTHOR("David Woodhouse <dwmw2@infradead.org>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
......
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