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: Philipp Jungkamp <p.jungkamp@xxxxxxx>
---
I did not add the "data->integer.value == 0x02" condition to the wmi_notify
handler. The event data 0x02 and 0x03 are both emitted when changing toggling
the fn-lock, depending on the new setting. Since I don't know whether the
event data checks out on the affected laptops I'd prefer to omit the check.
Regards,
Philipp Jungkamp
drivers/platform/x86/ideapad-laptop.c | 255 ++++++++++++++++++++------
1 file changed, 200 insertions(+), 55 deletions(-)
diff --git a/drivers/platform/x86/ideapad-laptop.c b/drivers/platform/x86/ideapad-laptop.c
index a279f41d984b..ac5ad0e36e5e 100644
--- a/drivers/platform/x86/ideapad-laptop.c
+++ b/drivers/platform/x86/ideapad-laptop.c
@@ -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>
@@ -38,10 +39,13 @@
#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 */
+enum ideapad_wmi_event_type {
+ IDEAPAD_WMI_EVENT_ESC,
+ IDEAPAD_WMI_EVENT_FN_KEYS,
+};
+
+struct ideapad_wmi_private {
+ enum ideapad_wmi_event_type event;
};
#endif
@@ -141,7 +145,6 @@ 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 +185,42 @@ 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@xxxxxxxxxxxxxxx");
+/*
+ * 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 +1149,7 @@ 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 +1163,28 @@ 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 +1588,6 @@ 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 +1678,110 @@ static void ideapad_check_features(struct ideapad_private *priv)
}
}
+#if IS_ENABLED(CONFIG_ACPI_WMI)
+/*
+ * WMI driver
+ */
+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 = *(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);
+}
+
+struct ideapad_wmi_private ideapad_wmi_context_esc = {
+ .event = IDEAPAD_WMI_EVENT_ESC
+};
+
+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 +1863,16 @@ 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 +1898,7 @@ 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 +1950,30 @@ 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@xxxxxxxxxxxxx>");
MODULE_DESCRIPTION("IdeaPad ACPI Extras");
--
2.38.1
