[PATCH 05/98] hp-wmi: notify of a potential docking state change on resume

Len Brown
2009-03-28T04:32:40Z

From: Frans Pop <elendil@planet.nl>

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>
---
drivers/platform/x86/hp-wmi.c | 25 +++++++++++++++++++++++++
1 files changed, 25 insertions(+), 0 deletions(-)

diff --git a/drivers/platform/x86/hp-wmi.c b/drivers/platform/x86/hp-wmi.c
index f41135f..50d9019 100644
--- a/drivers/platform/x86/hp-wmi.c
+++ b/drivers/platform/x86/hp-wmi.c
@@ -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;
--
1.6.0.6