ACER Vivobook Flip (TP401NAS) virtual intel switch is implemented as
follow:
Device (VGBI)
{
Name (_HID, EisaId ("INT33D6") ...
Name (VBDS, Zero)
Method (_STA, 0, Serialized) // _STA: Status ...
Method (VBDL, 0, Serialized)
{
PB1E |= 0x20
VBDS |= 0x40
}
Method (VGBS, 0, Serialized)
{
Return (VBDS) /* \_SB_.PCI0.SBRG.EC0_.VGBI.VBDS */
}
...
}
By default VBDS is set to 0. At boot it is set to clamshell (bit 6 set)
only after method VBDL is executed.
Since VBDL is now evaluated in the probe routine later, after the device
is registered, the retrieved value of VBDS was still 0 ("tablet mode")
when setting up the virtual switch.
Make sure to evaluate VGBS after VBDL, to ensure the
convertible boots in clamshell mode, the expected default.
Fixes: 26173179fae1 ("platform/x86: intel-vbtn: Eval VBDL after registering our notifier")
Signed-off-by: Gwendal Grignou <gwendal@xxxxxxxxxxxx>
---
drivers/platform/x86/intel/vbtn.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/drivers/platform/x86/intel/vbtn.c b/drivers/platform/x86/intel/vbtn.c
index 48f0ac19d6ddf..79bb2c801daa9 100644
--- a/drivers/platform/x86/intel/vbtn.c
+++ b/drivers/platform/x86/intel/vbtn.c
@@ -136,8 +136,6 @@ static int intel_vbtn_input_setup(struct platform_device *device)
priv->switches_dev->id.bustype = BUS_HOST;
if (priv->has_switches) {
- detect_tablet_mode(&device->dev);
-
ret = input_register_device(priv->switches_dev);
if (ret)
return ret;
@@ -312,6 +310,9 @@ static int intel_vbtn_probe(struct platform_device *device)
if (ACPI_FAILURE(status))
dev_err(&device->dev, "Error VBDL failed with ACPI status %d\n", status);
}
+ // Check switches after buttons since VBDL may have side effects.
+ if (has_switches)
+ detect_tablet_mode(&device->dev);
device_init_wakeup(&device->dev, true);
/*
--
2.44.0.478.gd926399ef9-goog
