Commit aa23ca3d98f7 ("gpiolib: acpi: Add honor_wakeup module-option +
quirk mechanism") added a quirk for some models of the HP x2 10 series.
There are 2 issues with the comment describing the quirk:
1) The comment claims the DMI quirk applies to all Cherry Trail based HP x2
10 models. In the mean time I have learned that there are at least 3
variants of the HP x2 10 models:
Bay Trail SoC + AXP288 PMIC
Cherry Trail SoC + AXP288 PMIC
Cherry Trail SoC + TI PMIC
And this quirk's DMI matches only match the Cherry Trail SoC + TI PMIC
SoC, which is good because we want a slightly different quirk for the
others. This commit updates the comment to make it clear that the quirk
is only for the Cherry Trail SoC + TI PMIC variants.
2) The comment says that it is ok to disable wakeup on all ACPI GPIO event
handlers, because there is only the one for the embedded-controller
events. This is not true, there also is a handler for the special
INT0002 device which is related to USB wakeups. We need to also disable
wakeups on that one because the device turns of the USB-keyboard built
into the dock when closing the lid. The XHCI controller takes a while
to notice this, so it only notices it when already suspended, causing
a spurious wakeup because of this. So disabling wakeup on all handlers
is the right thing to do, but not because there only is the one handler
for the EC events. This commit updates the comment to correctly reflect
this.
Fixes: aa23ca3d98f7 ("gpiolib: acpi: Add honor_wakeup module-option + quirk mechanism")
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/gpio/gpiolib-acpi.c | 15 ++++++++++-----
1 file changed, 10 insertions(+), 5 deletions(-)
diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c
index 31fee5e918b7..bc96f28d4807 100644
--- a/drivers/gpio/gpiolib-acpi.c
+++ b/drivers/gpio/gpiolib-acpi.c
@@ -1345,11 +1345,16 @@ static const struct dmi_system_id gpiolib_acpi_quirks[] = {
},
{
/*
- * Various HP X2 10 Cherry Trail models use an external
- * embedded-controller connected via I2C + an ACPI GPIO
- * event handler. The embedded controller generates various
- * spurious wakeup events when suspended. So disable wakeup
- * for its handler (it uses the only ACPI GPIO event handler).
+ * HP X2 10 models with Cherry Trail SoC + TI PMIC use an
+ * external embedded-controller connected via I2C + an ACPI
+ * GPIO event handler. The embedded controller generates
+ * various spurious wakeup events when suspended.
+ * When suspending by closing the LID, the power to the USB
+ * keyboard is turned off, causing INT0002 ACPI events to
+ * trigger once the XHCI controller notices the keyboard is
+ * gone. So INT0002 events cause spurious wakeups too.
+ * These are the only 2 ACPI event handlers, so we disable
+ * wakeups for all event handlers to fix the spurious wakeups.
* This breaks wakeup when opening the lid, the user needs
* to press the power-button to wakeup the system. The
* alternative is suspend simply not working, which is worse.
--
2.25.1
