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platform/x86: asus-wmi: don't allow eGPU switching if eGPU not connected

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Check the ASUS_WMI_DEVID_EGPU_CONNECTED method for eGPU connection
before allowing the ASUS_WMI_DEVID_EGPU method to run.

Signed-off-by: Luke D. Jones <luke@ljones.dev>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20230630053552.976579-6-luke@ljones.dev
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
This commit is contained in:
Luke D. Jones 2023-06-30 17:35:49 +12:00 committed by Hans de Goede
parent d4eca58aaf
commit d49f4d1a30
1 changed files with 9 additions and 0 deletions
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9
drivers/platform/x86/asus-wmi.c
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@ -693,6 +693,15 @@ static ssize_t egpu_enable_store(struct device *dev,
if (enable > 1)
return -EINVAL;
err = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_EGPU_CONNECTED);
if (err < 0)
return err;
if (err < 1) {
err = -ENODEV;
pr_warn("Failed to set egpu disable: %d\n", err);
return err;
}
err = asus_wmi_set_devstate(ASUS_WMI_DEVID_EGPU, enable, &result);
if (err) {
pr_warn("Failed to set egpu disable: %d\n", err);