Commit 635173a1 authored by Rafael J. Wysocki's avatar Rafael J. Wysocki

platform/x86: intel-hid: Wake up Dell Latitude 7275 from suspend-to-idle

On Dell Latitude 7275 the 5-button array is not exposed in the
ACPI tables, but still notifies are sent to the Intel HID device
object (device ID INT33D5) in response to power button actions while
suspended to idle.  However, they are currently ignored as the
intel-hid driver is not prepared to take care of them.

As a result, power button wakeup from suspend-to-idle doesn't work
on this platform, but suspend-to-idle is the only reliable suspend
variant on it (the S3 implementation in the platform firmware turns
out to be broken), so it would be good to handle it properly.

For this reason, add an upfront check against the power button press
event (0xCE) to notify_handler() in the wakeup mode which allows it
to catch the power button wakeup notification on the affected
platform (even though priv->array is NULL on it) and should not
change the behavior on platforms with priv->array present (because
priv->array contains the event in question in those cases).

Link: https://bugzilla.kernel.org/show_bug.cgi?id=196115Tested-by: default avatarJérôme de Bretagne <jerome.debretagne@gmail.com>
Signed-off-by: default avatarRafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: default avatarAndy Shevchenko <andy.shevchenko@gmail.com>
Acked-By: default avatarMario Limonciello <mario.limonciello@dell.com>
parent 142bce74
...@@ -203,15 +203,26 @@ static void notify_handler(acpi_handle handle, u32 event, void *context) ...@@ -203,15 +203,26 @@ static void notify_handler(acpi_handle handle, u32 event, void *context)
acpi_status status; acpi_status status;
if (priv->wakeup_mode) { if (priv->wakeup_mode) {
/*
* Needed for wakeup from suspend-to-idle to work on some
* platforms that don't expose the 5-button array, but still
* send notifies with the power button event code to this
* device object on power button actions while suspended.
*/
if (event == 0xce)
goto wakeup;
/* Wake up on 5-button array events only. */ /* Wake up on 5-button array events only. */
if (event == 0xc0 || !priv->array) if (event == 0xc0 || !priv->array)
return; return;
if (sparse_keymap_entry_from_scancode(priv->array, event)) if (!sparse_keymap_entry_from_scancode(priv->array, event)) {
pm_wakeup_hard_event(&device->dev);
else
dev_info(&device->dev, "unknown event 0x%x\n", event); dev_info(&device->dev, "unknown event 0x%x\n", event);
return;
}
wakeup:
pm_wakeup_hard_event(&device->dev);
return; return;
} }
......
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