ACPI: thinkpad-acpi: issue input events for tablet swivel events

Issue EV_SW SW_TABLET_MODE events for HKEY events 0x5009 and 0x500A on the
X41t/X60t/X61t.  As usual, we suppress the HKEY events on the netlink
interface to avoid sending duplicate events to userspace.

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Signed-off-by: Len Brown <len.brown@intel.com>

1 files changed, 20 insertions, 2 deletions

diff --git a/drivers/misc/thinkpad_acpi.c b/drivers/misc/thinkpad_acpi.c
index 4ea3866ddf90..35483502a117 100644
--- a/drivers/misc/thinkpad_acpi.c
+++ b/drivers/misc/thinkpad_acpi.c
@@ -1172,6 +1172,17 @@ static void tpacpi_input_send_radiosw(void)
         mutex_unlock(&tpacpi_inputdev_send_mutex);
 }
 
+static void tpacpi_input_send_tabletsw(unsigned int state)
+{
+        mutex_lock(&tpacpi_inputdev_send_mutex);
+
+        input_report_switch(tpacpi_inputdev,
+                            SW_TABLET_MODE, !!state);
+        input_sync(tpacpi_inputdev);
+
+        mutex_unlock(&tpacpi_inputdev_send_mutex);
+}
+
 static void tpacpi_input_send_key(unsigned int scancode)
 {
         unsigned int keycode;
@@ -2020,6 +2031,10 @@ static int __init hotkey_init(struct ibm_init_struct *iibm)
                         set_bit(EV_SW, tpacpi_inputdev->evbit);
                         set_bit(SW_RADIO, tpacpi_inputdev->swbit);
                 }
+                if (thinkpad_id.vendor == PCI_VENDOR_ID_LENOVO) {
+                        set_bit(EV_SW, tpacpi_inputdev->evbit);
+                        set_bit(SW_TABLET_MODE, tpacpi_inputdev->swbit);
+                }
 
                 dbg_printk(TPACPI_DBG_INIT,
                                 "enabling hot key handling\n");
@@ -2169,11 +2184,14 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
                         /* 0x5000-0x5FFF: human interface helpers */
                         switch (hkey) {
                         case 0x5010: /* Lenovo new BIOS: brightness changed */
-                        case 0x5009: /* X61t: swivel up (tablet mode) */
-                        case 0x500a: /* X61t: swivel down (normal mode) */
                         case 0x500b: /* X61t: tablet pen inserted into bay */
                         case 0x500c: /* X61t: tablet pen removed from bay */
                                 break;
+                        case 0x5009: /* X61t: swivel up (tablet mode) */
+                        case 0x500a: /* X61t: swivel down (normal mode) */
+                                tpacpi_input_send_tabletsw((hkey == 0x5009));
+                                send_acpi_ev = 0;
+                                break;
                         case 0x5001:
                         case 0x5002:
                                 /* LID switch events.  Do not propagate */