acer-wmi: change to emit touchpad on off key

KEY_TOUCHPAD_TOOGLE key is for notice userland change touchpad state
via xf86-input-synaptics on the machine that don't toggle touchpad in
hardware. But, acer laptop actually toggle touchpad in hardware.
So, this patch change to emit KEY_TOUCHPAD_ON/OFF key when acer-wmi grab
device state of touchpad.

Reference: brc#848270
        https://bugzilla.redhat.com/show_bug.cgi?id=848270

Tested-by: Nathanael Noblet <nathanael@gnat.ca>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <matthew.garrett@nebula.com>

1 files changed, 10 insertions, 3 deletions

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index ff0a866791ca..44f62b24f0a1 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -125,7 +125,9 @@ static const struct key_entry acer_wmi_keymap[] = {
         {KE_IGNORE, 0x63, {KEY_BRIGHTNESSDOWN} },
         {KE_KEY, 0x64, {KEY_SWITCHVIDEOMODE} }, /* Display Switch */
         {KE_IGNORE, 0x81, {KEY_SLEEP} },
-        {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad On/Off */
+        {KE_KEY, 0x82, {KEY_TOUCHPAD_TOGGLE} }, /* Touch Pad Toggle */
+        {KE_KEY, KEY_TOUCHPAD_ON, {KEY_TOUCHPAD_ON} },
+        {KE_KEY, KEY_TOUCHPAD_OFF, {KEY_TOUCHPAD_OFF} },
         {KE_IGNORE, 0x83, {KEY_TOUCHPAD_TOGGLE} },
         {KE_END, 0}
 };
@@ -147,6 +149,7 @@ struct event_return_value {
 #define ACER_WMID3_GDS_THREEG           (1<<6)  /* 3G */
 #define ACER_WMID3_GDS_WIMAX            (1<<7)  /* WiMAX */
 #define ACER_WMID3_GDS_BLUETOOTH        (1<<11) /* BT */
+#define ACER_WMID3_GDS_TOUCHPAD         (1<<1)  /* Touchpad */
 
 struct lm_input_params {
         u8 function_num;        /* Function Number */
@@ -1678,6 +1681,7 @@ static void acer_wmi_notify(u32 value, void *context)
         acpi_status status;
         u16 device_state;
         const struct key_entry *key;
+        u32 scancode;
 
         status = wmi_get_event_data(value, &response);
         if (status != AE_OK) {
@@ -1714,6 +1718,7 @@ static void acer_wmi_notify(u32 value, void *context)
                         pr_warn("Unknown key number - 0x%x\n",
                                 return_value.key_num);
                 } else {
+                        scancode = return_value.key_num;
                         switch (key->keycode) {
                         case KEY_WLAN:
                         case KEY_BLUETOOTH:
@@ -1727,9 +1732,11 @@ static void acer_wmi_notify(u32 value, void *context)
                                         rfkill_set_sw_state(bluetooth_rfkill,
                                                 !(device_state & ACER_WMID3_GDS_BLUETOOTH));
                                 break;
+                        case KEY_TOUCHPAD_TOGGLE:
+                                scancode = (device_state & ACER_WMID3_GDS_TOUCHPAD) ?
+                                                KEY_TOUCHPAD_ON : KEY_TOUCHPAD_OFF;
                         }
-                        sparse_keymap_report_entry(acer_wmi_input_dev, key,
-                                                   1, true);
+                        sparse_keymap_report_event(acer_wmi_input_dev, scancode, 1, true);
                 }
                 break;
         case WMID_ACCEL_EVENT: