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| author | Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com> | 2019-05-14 21:00:31 +0200 |
|---|---|---|
| committer | Andy Shevchenko <andriy.shevchenko@linux.intel.com> | 2019-06-17 15:22:47 +0300 |
| commit | e0668f28888184f6c633110a37386f2d4a6fa00e (patch) | |
| tree | 41a806cd087cc71d85211ddaedc795c611075caa /drivers/hid/hid-asus.c | |
| parent | e7488e58c7cfe4be0c52db68622a0397bb75258e (diff) | |
| download | lwn-e0668f28888184f6c633110a37386f2d4a6fa00e.tar.gz lwn-e0668f28888184f6c633110a37386f2d4a6fa00e.zip | |
platform/x86: asus-wmi: Improve DSTS WMI method ID detection
The DSTS method detection mistakenly selects DCTS instead of DSTS if
nothing is returned when the method ID is not defined in WMNB. As a result,
the control of keyboard backlight is not functional for TUF Gaming series
laptops. Implement detection based on _UID of the WMI device instead.
There is evidence that DCTS is handled by ACPI WMI devices that have _UID
ASUSWMI, whereas none of the devices without ASUSWMI respond to DCTS and
DSTS is used instead [1].
DSDT examples:
FX505GM (_UID ATK):
Method (WMNB, 3, Serialized)
{ ...
If ((Local0 == 0x53545344))
{
...
Return (Zero)
}
...
// No return
}
K54C (_UID ATK):
Method (WMNB, 3, Serialized)
{ ...
If ((Local0 == 0x53545344))
{
...
Return (0x02)
}
...
Return (0xFFFFFFFE)
}
[1] Link: https://lkml.org/lkml/2019/4/11/322
Signed-off-by: Yurii Pavlovskyi <yurii.pavlovskyi@gmail.com>
Suggested-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Diffstat (limited to 'drivers/hid/hid-asus.c')
| -rw-r--r-- | drivers/hid/hid-asus.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hid/hid-asus.c b/drivers/hid/hid-asus.c index 336aeaed1159..1d01fe23ca0c 100644 --- a/drivers/hid/hid-asus.c +++ b/drivers/hid/hid-asus.c @@ -396,7 +396,7 @@ static bool asus_kbd_wmi_led_control_present(struct hid_device *hdev) if (!IS_ENABLED(CONFIG_ASUS_WMI)) return false; - ret = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS2, + ret = asus_wmi_evaluate_method(ASUS_WMI_METHODID_DSTS, ASUS_WMI_DEVID_KBD_BACKLIGHT, 0, &value); hid_dbg(hdev, "WMI backlight check: rc %d value %x", ret, value); if (ret) |