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platform/x86: asus-wmi: Detect quirk_no_rfkill from the DSDT

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Some Asus laptops that have an airplane-mode indicator LED, also have
the WMI WLAN user bit set, and the following bits in their DSDT:

    Scope (_SB)
    {
      (...)
      Device (ATKD)
      {
        (...)
        Method (WMNB, 3, Serialized)
        {
          (...)
          If (LEqual (IIA0, 0x00010002))
          {
            OWGD (IIA1)
            Return (One)
          }
        }
      }
    }

So when asus-wmi uses ASUS_WMI_DEVID_WLAN_LED (0x00010002) to store the
wlan state, it drives the airplane-mode indicator LED (through the call
to OWGD) in an inverted fashion: the LED is ON when airplane mode is OFF
(since wlan is ON), and vice-versa.

This commit skips registering RFKill switches at all for these laptops,
to allow the asus-wireless driver to drive the airplane mode LED
correctly through the ASHS ACPI device. Relying on the presence of ASHS
and ASUS_WMI_DSTS_USER_BIT avoids adding DMI-based quirks for at least
21 different laptops.

Signed-off-by: João Paulo Rechi Vita <jprvita@endlessm.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
This commit is contained in:
João Paulo Rechi Vita 2017-02-20 14:50:22 -05:00 committed by Andy Shevchenko
parent 5802d0bc3f
commit 71050ae7bf
1 changed files with 19 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

23
drivers/platform/x86/asus-wmi.c
View File

@ -159,6 +159,8 @@ MODULE_LICENSE("GPL");
#define USB_INTEL_XUSB2PR 0xD0
#define PCI_DEVICE_ID_INTEL_LYNXPOINT_LP_XHCI 0x9c31
static const char * const ashs_ids[] = { "ATK4001", "ATK4002", NULL };
struct bios_args {
u32 arg0;
u32 arg1;
@ -2051,6 +2053,16 @@ static int asus_wmi_fan_init(struct asus_wmi *asus)
return 0;
}
static bool ashs_present(void)
{
int i = 0;
while (ashs_ids[i]) {
if (acpi_dev_found(ashs_ids[i++]))
return true;
}
return false;
}
/*
* WMI Driver
*/
@ -2095,6 +2107,13 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err)
goto fail_leds;
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
asus->driver->wlan_ctrl_by_user = 1;
if (asus->driver->wlan_ctrl_by_user && ashs_present())
asus->driver->quirks->no_rfkill = 1;
if (!asus->driver->quirks->no_rfkill) {
err = asus_wmi_rfkill_init(asus);
if (err)
@ -2134,10 +2153,6 @@ static int asus_wmi_add(struct platform_device *pdev)
if (err)
goto fail_debugfs;
asus_wmi_get_devstate(asus, ASUS_WMI_DEVID_WLAN, &result);
if (result & (ASUS_WMI_DSTS_PRESENCE_BIT | ASUS_WMI_DSTS_USER_BIT))
asus->driver->wlan_ctrl_by_user = 1;
return 0;
fail_debugfs: