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platform/x86: intel-vbtn: Support separate press/release events

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Currently all key events use autorelease, but this forbids use as a
modifier key.

As all event codes come in even/odd pairs, we can lookup the key type
(KE_KEY/KE_IGNORE) for the key up event corresponding to the currently
handled key down event. If the key up is ignored, we keep setting the
autorelease flag for the key down.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Darren Hart (VMware) <dvhart@infradead.org>
This commit is contained in:
Stefan Brüns 2017-11-09 23:44:33 +01:00 committed by Darren Hart (VMware)
parent 1c82849622
commit 95f38fd46c
1 changed files with 15 additions and 2 deletions
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17
drivers/platform/x86/intel-vbtn.c
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@ -76,14 +76,27 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
{
struct platform_device *device = context;
struct intel_vbtn_priv *priv = dev_get_drvdata(&device->dev);
const struct key_entry *ke_rel;
bool autorelease;
if (priv->wakeup_mode) {
if (sparse_keymap_entry_from_scancode(priv->input_dev, event)) {
pm_wakeup_hard_event(&device->dev);
return;
}
} else if (sparse_keymap_report_event(priv->input_dev, event, 1, true)) {
return;
} else {
/* Use the fact press/release come in even/odd pairs */
if ((event & 1) && sparse_keymap_report_event(priv->input_dev,
event, 0, false))
return;
ke_rel = sparse_keymap_entry_from_scancode(priv->input_dev,
event | 1);
autorelease = !ke_rel || ke_rel->type == KE_IGNORE;
if (sparse_keymap_report_event(priv->input_dev, event, 1,
autorelease))
return;
}
dev_dbg(&device->dev, "unknown event index 0x%x\n", event);
}