Add a new force_caps module parameter to allow overriding the drivers
builtin capability detection mechanism.
This can be used to for example:
-Disable rfkill functionality on devices where there is an AA OEM DMI
record advertising non functional rfkill switches
-Force loading of the driver on devices with a missing AA OEM DMI record
Note that force_caps is -1 when unset, this allows forcing the
capability field to 0, which results in acer-wmi only providing WMI
hotkey handling while disabling all other (led, rfkill, backlight)
functionality.
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
---
drivers/platform/x86/acer-wmi.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index f728cb5e5115..87f64b91d283 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -232,6 +232,7 @@ static int mailled = -1;
static int brightness = -1;
static int threeg = -1;
static int force_series;
+static int force_caps = -1;
static bool ec_raw_mode;
static bool has_type_aa;
static u16 commun_func_bitmap;
@@ -241,11 +242,13 @@ module_param(mailled, int, 0444);
module_param(brightness, int, 0444);
module_param(threeg, int, 0444);
module_param(force_series, int, 0444);
+module_param(force_caps, int, 0444);
module_param(ec_raw_mode, bool, 0444);
MODULE_PARM_DESC(mailled, "Set initial state of Mail LED");
MODULE_PARM_DESC(brightness, "Set initial LCD backlight brightness");
MODULE_PARM_DESC(threeg, "Set initial state of 3G hardware");
MODULE_PARM_DESC(force_series, "Force a different laptop series");
+MODULE_PARM_DESC(force_caps, "Force the capability bitmask to this value");
MODULE_PARM_DESC(ec_raw_mode, "Enable EC raw mode");
struct acer_data {
@@ -2163,7 +2166,7 @@ static int __init acer_wmi_init(void)
}
/* WMID always provides brightness methods */
interface->capability |= ACER_CAP_BRIGHTNESS;
- } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa) {
+ } else if (!wmi_has_guid(WMID_GUID2) && interface && !has_type_aa && force_caps == -1) {
pr_err("No WMID device detection method found\n");
return -ENODEV;
}
@@ -2193,6 +2196,9 @@ static int __init acer_wmi_init(void)
if (acpi_video_get_backlight_type() != acpi_backlight_vendor)
interface->capability &= ~ACER_CAP_BRIGHTNESS;
+ if (force_caps != -1)
+ interface->capability = force_caps;
+
if (wmi_has_guid(WMID_GUID3)) {
if (ACPI_FAILURE(acer_wmi_enable_rf_button()))
pr_warn("Cannot enable RF Button Driver\n");
--
2.28.0
