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Subject[PATCH] platform/x86: asus-wmi: Add support for SW_TABLET_MODE on UX360
Date
The UX360CA has a WMI device id 0x00060062, which reports whether the
lid is flipped in tablet mode (1) or in normal laptop mode (0).

This commit adds a quirk (quirk_asus_use_lid_flip_devid) for devices on
which this WMI device should be used to figure out the SW_TABLET_MODE
state, as opposed to the quirk_asus_use_kbd_dock_devid.

It is assumed other UX360* models have the same WMI device. As such, the
quirk is applied to devices with DMI_MATCH(DMI_PRODUCT_NAME, "UX360").
More devices with this feature need to be tested and added accordingly.

The reason for using a whitelist via the quirk mechanism is that the new
WMI device (0x00060062) is also present on some models which do not have
a 360 degree hinge (at least FX503VD and GL503VD from Hans' DSTS
collection) and therefore its presence cannot be relied on.

This patch is a followup to "platform/x86: asus-wmi: Fix SW_TABLET_MODE
always reporting 1 on many different models" by Hans de Goede.

Signed-off-by: Samuel Čavoj <samuel@cavoj.net>
Cc: Hans de Goede <hdegoede@redhat.com>
---
drivers/platform/x86/asus-nb-wmi.c | 14 +++++++++++++
drivers/platform/x86/asus-wmi.c | 23 ++++++++++++++++++++++
drivers/platform/x86/asus-wmi.h | 1 +
include/linux/platform_data/x86/asus-wmi.h | 1 +
4 files changed, 39 insertions(+)

diff --git a/drivers/platform/x86/asus-nb-wmi.c b/drivers/platform/x86/asus-nb-wmi.c
index 345bd224494b..ae5501e07712 100644
--- a/drivers/platform/x86/asus-nb-wmi.c
+++ b/drivers/platform/x86/asus-nb-wmi.c
@@ -119,6 +119,10 @@ static struct quirk_entry quirk_asus_use_kbd_dock_devid = {
.use_kbd_dock_devid = true,
};

+static struct quirk_entry quirk_asus_use_lid_flip_devid = {
+ .use_lid_flip_devid = true,
+};
+
static int dmi_matched(const struct dmi_system_id *dmi)
{
pr_info("Identified laptop model '%s'\n", dmi->ident);
@@ -520,6 +524,16 @@ static const struct dmi_system_id asus_quirks[] = {
},
.driver_data = &quirk_asus_use_kbd_dock_devid,
},
+ {
+ .callback = dmi_matched,
+ .ident = "ASUS ZenBook Flip UX360",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."),
+ /* Match UX360* */
+ DMI_MATCH(DMI_PRODUCT_NAME, "UX360"),
+ },
+ .driver_data = &quirk_asus_use_lid_flip_devid,
+ },
{},
};

diff --git a/drivers/platform/x86/asus-wmi.c b/drivers/platform/x86/asus-wmi.c
index ae6289d37faf..a628a7d9e066 100644
--- a/drivers/platform/x86/asus-wmi.c
+++ b/drivers/platform/x86/asus-wmi.c
@@ -63,6 +63,7 @@ MODULE_LICENSE("GPL");
#define NOTIFY_KBD_BRTTOGGLE 0xc7
#define NOTIFY_KBD_FBM 0x99
#define NOTIFY_KBD_TTP 0xae
+#define NOTIFY_LID_FLIP 0xfa

#define ASUS_WMI_FNLOCK_BIOS_DISABLED BIT(0)

@@ -375,6 +376,18 @@ static int asus_wmi_input_init(struct asus_wmi *asus)
}
}

+ if (asus->driver->quirks->use_lid_flip_devid) {
+ result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP);
+ if (result >= 0) {
+ input_set_capability(asus->inputdev, EV_SW, SW_TABLET_MODE);
+ input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
+ } else if (result == -ENODEV) {
+ pr_err("This device has lid_flip quirk but got ENODEV checking it. This is a bug.");
+ } else {
+ pr_err("Error checking for lid-flip: %d\n", result);
+ }
+ }
+
err = input_register_device(asus->inputdev);
if (err)
goto err_free_dev;
@@ -2127,6 +2140,16 @@ static void asus_wmi_handle_event_code(int code, struct asus_wmi *asus)
return;
}

+ if (asus->driver->quirks->use_lid_flip_devid && code == NOTIFY_LID_FLIP) {
+ result = asus_wmi_get_devstate_simple(asus, ASUS_WMI_DEVID_LID_FLIP);
+
+ if (result >= 0) {
+ input_report_switch(asus->inputdev, SW_TABLET_MODE, result);
+ input_sync(asus->inputdev);
+ }
+ return;
+ }
+
if (asus->fan_boost_mode_available && code == NOTIFY_KBD_FBM) {
fan_boost_mode_switch_next(asus);
return;
diff --git a/drivers/platform/x86/asus-wmi.h b/drivers/platform/x86/asus-wmi.h
index 1a95c172f94b..b302415bf1d9 100644
--- a/drivers/platform/x86/asus-wmi.h
+++ b/drivers/platform/x86/asus-wmi.h
@@ -34,6 +34,7 @@ struct quirk_entry {
bool wmi_backlight_set_devstate;
bool wmi_force_als_set;
bool use_kbd_dock_devid;
+ bool use_lid_flip_devid;
int wapf;
/*
* For machines with AMD graphic chips, it will send out WMI event
diff --git a/include/linux/platform_data/x86/asus-wmi.h b/include/linux/platform_data/x86/asus-wmi.h
index 897b8332a39f..2f274cf52805 100644
--- a/include/linux/platform_data/x86/asus-wmi.h
+++ b/include/linux/platform_data/x86/asus-wmi.h
@@ -62,6 +62,7 @@

/* Misc */
#define ASUS_WMI_DEVID_CAMERA 0x00060013
+#define ASUS_WMI_DEVID_LID_FLIP 0x00060062

/* Storage */
#define ASUS_WMI_DEVID_CARDREADER 0x00080013
--
2.28.0
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