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thinkpad-acpi: handle HKEY 0x4010, 0x4011 events 

Handle events 0x4010 and 0x4011 so that we do not pester users about them.

These events report when the thinkpad is docked/undocked to a native
hotplug dock (i.e. one that does not need ACPI handling, nor is represented
in the ACPI device tree).  Such docks are based on USB 2.0/3.0, and also
work as port replicators.

We really want a proper dock class to report these, or at least new input
EV_SW events.  Since it is not clear which one to use yet, keep reporting
them as vendor-specific ThinkPad events.

WARNING: As defined by the thinkpad-acpi sysfs ABI rules of engagement, the
vendor-specific events will be REMOVED as soon as generic events are made
available (duplicate events are a big problem), with an appropriate update
to the thinkpad-acpi sysfs/event ABI versioning.  Userspace is already
prepared to provide easy backwards compatibility for such changes when
convenient to the distro (see acpi-fakekey).

* Event 0x4010: docking to hotplug dock/port replicator
* Event 0x4011: undocking from hotplug dock/port replicator

Typical usecase would be to trigger display reconfiguration.

Reports mention T410, T510, and series 3 docks/port replicators.  Special
thanks to Robert de Rooy for his extensive report and analysis of the
situation.

http://www.thinkwiki.org/wiki/ThinkPad_Port_Replicator_Series_3
http://www.thinkwiki.org/wiki/ThinkPad_Mini_Dock_Series_3
http://www.thinkwiki.org/wiki/ThinkPad_Mini_Dock_Plus_Series_3
http://www.thinkwiki.org/wiki/ThinkPad_Mini_Dock_Plus_Series_3_for_Mobile_Workstations
http://lenovoblogs.com/insidethebox/?p=290

Signed-off-by: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Reported-by: Claudius Hubig <claudiushubig@chubig.net>
Reported-by: Doctor Bill <docbill@gmail.com>
Reported-by: Korte Noack <gbk.noack@gmx.de>
Reported-by: Robert de Rooy <robert.de.rooy@gmail.com>
Reported-by: Sebastian Will <swill@csail.mit.edu>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
This commit is contained in:
Henrique de Moraes Holschuh 2011-06-05 16:22:35 -03:00 committed by Matthew Garrett
parent 96b269c1b0
commit a50245af78
2 changed files with 37 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
Documentation/laptops/thinkpad-acpi.txt
View File

@ -547,6 +547,8 @@ Events that are propagated by the driver to userspace:
0x3006 Bay hotplug request (hint to power up SATA link when
the optical drive tray is ejected)
0x4003 Undocked (see 0x2x04), can sleep again
0x4010 Docked into hotplug port replicator (non-ACPI dock)
0x4011 Undocked from hotplug port replicator (non-ACPI dock)
0x500B Tablet pen inserted into its storage bay
0x500C Tablet pen removed from its storage bay
0x6011 ALARM: battery is too hot

44
drivers/platform/x86/thinkpad_acpi.c
View File

@ -184,6 +184,10 @@ enum tpacpi_hkey_event_t {
/* Misc bay events */
TP_HKEY_EV_OPTDRV_EJ = 0x3006, /* opt. drive tray ejected */
TP_HKEY_EV_HOTPLUG_DOCK = 0x4010, /* docked into hotplug dock
or port replicator */
TP_HKEY_EV_HOTPLUG_UNDOCK = 0x4011, /* undocked from hotplug
dock or port replicator */
/* User-interface events */
TP_HKEY_EV_LID_CLOSE = 0x5001, /* laptop lid closed */
@ -3521,6 +3525,34 @@ static bool hotkey_notify_wakeup(const u32 hkey,
return true;
}
static bool hotkey_notify_dockevent(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
{
/* 0x4000-0x4FFF: dock-related events */
*send_acpi_ev = true;
*ignore_acpi_ev = false;
switch (hkey) {
case TP_HKEY_EV_UNDOCK_ACK:
/* ACPI undock operation completed after wakeup */
hotkey_autosleep_ack = 1;
pr_info("undocked\n");
hotkey_wakeup_hotunplug_complete_notify_change();
return true;
case TP_HKEY_EV_HOTPLUG_DOCK: /* docked to port replicator */
pr_info("docked into hotplug port replicator\n");
return true;
case TP_HKEY_EV_HOTPLUG_UNDOCK: /* undocked from port replicator */
pr_info("undocked from hotplug port replicator\n");
return true;
default:
return false;
}
}
static bool hotkey_notify_usrevent(const u32 hkey,
bool *send_acpi_ev,
bool *ignore_acpi_ev)
@ -3669,15 +3701,9 @@ static void hotkey_notify(struct ibm_struct *ibm, u32 event)
}
break;
case 4:
/* 0x4000-0x4FFF: dock-related wakeups */
if (hkey == TP_HKEY_EV_UNDOCK_ACK) {
hotkey_autosleep_ack = 1;
pr_info("undocked\n");
hotkey_wakeup_hotunplug_complete_notify_change();
known_ev = true;
} else {
known_ev = false;
}
/* 0x4000-0x4FFF: dock-related events */
known_ev = hotkey_notify_dockevent(hkey, &send_acpi_ev,
&ignore_acpi_ev);
break;
case 5:
/* 0x5000-0x5FFF: human interface helpers */