linux-kernel - [PATCH] platform/x86: intel-vbtn: Ignore extraneous events from tablet mode

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Date:   Thu, 21 Jun 2018 13:12:07 -0700
From:   Matt Delco <delco@...omium.org>
To:     AceLan Kao <acelan.kao@...onical.com>
Cc:     Darren Hart <dvhart@...radead.org>,
        Andy Shevchenko <andy@...radead.org>,
        platform-driver-x86@...r.kernel.or, linux-kernel@...r.kernel.org,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Matt Delco <delco@...omium.org>
Subject: [PATCH] platform/x86: intel-vbtn: Ignore extraneous events from tablet mode

The Dell laptop I have has an ACPI that sends 0xCB and 0xCC on entering
tablet mode.  On exiting tablet mode it sends 0xCA and 0xCD.  This
change has the driver ignore 0xCA and 0xCB.

Signed-off-by: Matt Delco <delco@...omium.org>
---
 drivers/platform/x86/intel-vbtn.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/intel-vbtn.c b/drivers/platform/x86/intel-vbtn.c
index c13780b8dabb..4c6f2bb1d1ac 100644
--- a/drivers/platform/x86/intel-vbtn.c
+++ b/drivers/platform/x86/intel-vbtn.c
@@ -38,8 +38,10 @@ static const struct key_entry intel_vbtn_keymap[] = {
 	{ KE_IGNORE, 0xC7, { KEY_VOLUMEDOWN } },	/* volume-down key release */
 	{ KE_KEY,    0xC8, { KEY_ROTATE_LOCK_TOGGLE } },	/* rotate-lock key press */
 	{ KE_KEY,    0xC9, { KEY_ROTATE_LOCK_TOGGLE } },	/* rotate-lock key release */
-	{ KE_SW,     0xCC, { .sw = { SW_TABLET_MODE, 1 } } },	/* Tablet */
-	{ KE_SW,     0xCD, { .sw = { SW_TABLET_MODE, 0 } } },	/* Laptop */
+	{ KE_IGNORE, 0xCA, { KEY_UNKNOWN } },			/* Laptop key press */
+	{ KE_IGNORE, 0xCB, { KEY_UNKNOWN } },			/* Tablet key press */
+	{ KE_SW,     0xCC, { .sw = { SW_TABLET_MODE, 1 } } },	/* Tablet key release */
+	{ KE_SW,     0xCD, { .sw = { SW_TABLET_MODE, 0 } } },	/* Laptop key release */
 	{ KE_END },
 };
 
-- 
2.18.0.rc2.346.g013aa6912e-goog