> -----Original Message----- > From: Jérôme de Bretagne [mailto:jerome.debretagne@xxxxxxxxx] > Sent: Sunday, September 17, 2017 5:57 PM > To: platform-driver-x86@xxxxxxxxxxxxxxx > Cc: Darren Hart <dvhart@xxxxxxxxxxxxx>; LKML <linux-kernel@xxxxxxxxxxxxxxx>; > Linux ACPI <linux-acpi@xxxxxxxxxxxxxxx>; Rafael J. Wysocki <rjw@xxxxxxxxxxxxx>; > Andy Shevchenko <andy.shevchenko@xxxxxxxxx>; Limonciello, Mario > <Mario_Limonciello@xxxxxxxx>; Alex Hung <alex.hung@xxxxxxxxxxxxx> > Subject: [PATCH] platform/x86: intel-hid: Power button suspend on Dell Latitude > 7275 > > From: Jérôme de Bretagne <jerome.debretagne@xxxxxxxxx> > > 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. > They were ignored as the intel-hid driver was not prepared to > take care of them until recently. > > Power button wakeup from suspend-to-idle was added in: > 635173a17b03 ("intel-hid: Wake up Dell Latitude 7275 from > suspend-to-idle"). However power button suspend doesn't work > yet on this platform so it would be good to add it also. > > On the affected platform (for which priv->array is NULL), add > a new upfront check against the power button press notification > (0xCE) to notify_handler(), outside the wakeup mode this time, > which allows to report the power button press event and > trigger the suspend. Also catch and ignore the corresponding > power button release notification (0xCF) to stop it from being > reported as an "unknown event" in the logs. > > Link: https://bugzilla.kernel.org/show_bug.cgi?id=196115 > Tested-by: Jérôme de Bretagne <jerome.debretagne@xxxxxxxxx> > Signed-off-by: Jérôme de Bretagne <jerome.debretagne@xxxxxxxxx> > --- > drivers/platform/x86/intel-hid.c | 16 ++++++++++++++++ > 1 file changed, 16 insertions(+) > > diff --git a/drivers/platform/x86/intel-hid.c b/drivers/platform/x86/intel-hid.c > index a782c78e7c63..b19f8dcf9d8c 100644 > --- a/drivers/platform/x86/intel-hid.c > +++ b/drivers/platform/x86/intel-hid.c > @@ -226,6 +226,22 @@ static void notify_handler(acpi_handle handle, u32 event, > void *context) > return; > } > > + /* > + * Needed for suspend to work on some platforms that don't expose > + * the 5-button array, but still send notifies with power button > + * event code to this device object on power button actions. > + * > + * Report the power button press; catch and ignore the button release. > + */ > + if (!priv->array) { > + if (event == 0xce) { > + input_report_key(priv->input_dev, KEY_POWER, 1); > + input_sync(priv->input_dev); > + return; > + } else if (event == 0xcf) > + return; > + } > + > /* 0xC0 is for HID events, other values are for 5 button array */ > if (event != 0xc0) { > if (!priv->array || LGTM, it's improved from what you posted to that bug already. Acked-By: Mario Limonciello <mario.limonciello@xxxxxxxx> ��.n��������+%������w��{.n�����{�����ܨ}���Ơz�j:+v�����w����ޙ��&�)ߡ�a����z�ޗ���ݢj��w�f
