This is a note to let you know that I've just added the patch titled platform/x86: acer-wmi: Add new force_caps module parameter to the 5.10-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: platform-x86-acer-wmi-add-new-force_caps-module-para.patch and it can be found in the queue-5.10 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 00fd8540b624499f54a18caa0a97502375dbadcf Author: Hans de Goede <hdegoede@xxxxxxxxxx> Date: Mon Oct 19 20:56:26 2020 +0200 platform/x86: acer-wmi: Add new force_caps module parameter [ Upstream commit 39aa009bb66f9d5fbd1e58ca4aa03d6e6f2c9915 ] 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. Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx> Link: https://lore.kernel.org/r/20201019185628.264473-4-hdegoede@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index 184ec08d02a4..74021163ca23 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -233,6 +233,7 @@ 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; @@ -242,11 +243,13 @@ 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 { @@ -2169,7 +2172,7 @@ 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; } @@ -2199,6 +2202,9 @@ 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");