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platform/x86: ideapad-laptop: Fix interrupt storm on fn-lock toggle on some Yoga laptops 

Commit 3ae86d2d47 ("platform/x86: ideapad-laptop: Fix Legion 5 Fn lock
LED") uses the WMI event-id for the fn-lock event on some Legion 5 laptops
to manually toggle the fn-lock LED because the EC does not do it itself.
However, the same WMI ID is also sent on some Yoga laptops. Here, setting
the fn-lock state is not valid behavior, and causes the EC to spam
interrupts until the laptop is rebooted.

Add a set_fn_lock_led_list[] DMI-id list and only enable the workaround to
manually set the LED on models on this list.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=212671
Cc: Meng Dong <whenov@gmail.com>
Signed-off-by: Arnav Rawat <arnavr3@illinois.edu>
Link: https://lore.kernel.org/r/12093851.O9o76ZdvQC@fedora
[hdegoede@redhat.com: Check DMI-id list only once and store the result]
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Arnav Rawat 2022-11-11 14:32:09 +00:00 committed by Hans de Goede
parent 8b9b6a044b
commit 81a5603a0f
1 changed files with 17 additions and 0 deletions
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17
drivers/platform/x86/ideapad-laptop.c
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@ -136,6 +136,7 @@ struct ideapad_private {
bool dytc : 1;
bool fan_mode : 1;
bool fn_lock : 1;
bool set_fn_lock_led : 1;
bool hw_rfkill_switch : 1;
bool kbd_bl : 1;
bool touchpad_ctrl_via_ec : 1;
@ -1501,6 +1502,9 @@ static void ideapad_wmi_notify(u32 value, void *context)
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);
@ -1514,6 +1518,18 @@ static void ideapad_wmi_notify(u32 value, void *context)
}
#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[] = {
{
/* https://bugzilla.kernel.org/show_bug.cgi?id=212671 */
.matches = {
DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"),
DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo Legion R7000P2020H"),
}
},
{}
};
/*
* Some ideapads have a hardware rfkill switch, but most do not have one.
* Reading VPCCMD_R_RF always results in 0 on models without a hardware rfkill,
@ -1556,6 +1572,7 @@ static void ideapad_check_features(struct ideapad_private *priv)
acpi_handle handle = priv->adev->handle;
unsigned long val;
priv->features.set_fn_lock_led = dmi_check_system(set_fn_lock_led_list);
priv->features.hw_rfkill_switch = dmi_check_system(hw_rfkill_list);
/* Most ideapads with ELAN0634 touchpad don't use EC touchpad switch */