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hp-wmi: notify of a potential docking state change on resume

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It is possible that the system gets docked or undocked while it's
suspended. Generate an input event on resume to notify user space
if there was a state change.

As it is a switch, we can generate the event unconditionally; the
input layer will only pass it on if there is an actual change.

Signed-off-by: Frans Pop <elendil@planet.nl>
Cc: Matthew Garrett <mjg59@srcf.ucam.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Len Brown <len.brown@intel.com>
This commit is contained in:
Frans Pop 2009-03-04 11:55:28 -08:00 committed by Len Brown
parent 326d8519fc
commit 4c395bdd3f
1 changed files with 25 additions and 0 deletions
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25
drivers/platform/x86/hp-wmi.c
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@ -53,6 +53,7 @@ MODULE_ALIAS("wmi:5FB7F034-2C63-45e9-BE91-3D44E2C707E4");
static int __init hp_wmi_bios_setup(struct platform_device *device);
static int __exit hp_wmi_bios_remove(struct platform_device *device);
static int hp_wmi_resume_handler(struct platform_device *device);
struct bios_args {
u32 signature;
@ -101,6 +102,7 @@ static struct platform_driver hp_wmi_driver = {
},
.probe = hp_wmi_bios_setup,
.remove = hp_wmi_bios_remove,
.resume = hp_wmi_resume_handler,
};
static int hp_wmi_perform_query(int query, int write, int value)
@ -487,6 +489,29 @@ static int __exit hp_wmi_bios_remove(struct platform_device *device)
return 0;
}
static int hp_wmi_resume_handler(struct platform_device *device)
{
struct key_entry *key;
/*
* Docking state may have changed while suspended, so trigger
* an input event for the current state. As this is a switch,
* the input layer will only actually pass it on if the state
* changed.
*/
for (key = hp_wmi_keymap; key->type != KE_END; key++) {
switch (key->type) {
case KE_SW:
input_report_switch(hp_wmi_input_dev, key->keycode,
hp_wmi_dock_state());
input_sync(hp_wmi_input_dev);
break;
}
}
return 0;
}
static int __init hp_wmi_init(void)
{
int err;