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From c49e2c1b1dbe95821f8134a48ca747e5161e75a6 Mon Sep 17 00:00:00 2001
From: Mark H Weaver <mhw@netris.org>
Date: Sun, 23 Aug 2015 17:06:18 -0400
Subject: [PATCH] Yeeloong: Ignore the Fn + F5 (rfkill toggle) key combination.
* drivers/platform/mips/yeeloong_laptop.c (yeeloong_keymap): Do not
generate a user-visible key press from the Fn + F5 key combination.
---
drivers/platform/mips/yeeloong_laptop.c | 23 ++++++++++++++++++++++-
1 file changed, 22 insertions(+), 1 deletion(-)
diff --git a/drivers/platform/mips/yeeloong_laptop.c b/drivers/platform/mips/yeeloong_laptop.c
index 9f2d81b..6d7cde6 100644
--- a/drivers/platform/mips/yeeloong_laptop.c
+++ b/drivers/platform/mips/yeeloong_laptop.c
@@ -803,7 +803,28 @@ static const struct key_entry yeeloong_keymap[] = {
{KE_KEY, EVENT_BLACK_SCREEN, { KEY_DISPLAYTOGGLE } }, /* Fn + F2 */
{KE_KEY, EVENT_DISPLAY_TOGGLE, { KEY_SWITCHVIDEOMODE } }, /* Fn + F3 */
{KE_KEY, EVENT_AUDIO_MUTE, { KEY_MUTE } }, /* Fn + F4 */
- {KE_KEY, EVENT_WLAN, { KEY_WLAN } }, /* Fn + F5 */
+
+ /* XXX Fn + F5 is handled at a lower level (presumably by the
+ embedded controller) to toggle the state of the hardware
+ rfkill switch of the internal RTL8187B wireless adapter.
+
+ If we also map it to KEY_WLAN, as is done by the
+ loongson-community kernel as of August 2015, that causes
+ the generic rfkill input subsystem to toggle the state of
+ the software rfkill switch for all wireless devices.
+
+ At boot time, these two switch states start out
+ out-of-sync, so rfkill is always blocked by one or the
+ other: pressing Fn + F5 merely toggles whether it is the
+ software or hardware rfkill switch that's causing the
+ block. Even if we arranged to start with these two switch
+ states in sync, they might possibly get out of sync at some
+ point. It seems fragile.
+
+ So, instead, we simply avoid the dual meaning of this key,
+ by ignoring the key from software. */
+ {KE_IGNORE, EVENT_WLAN, { KEY_WLAN } }, /* Fn + F5 */
+
{KE_KEY, EVENT_DISPLAY_BRIGHTNESS, { KEY_BRIGHTNESSUP } }, /* Fn + up */
{KE_KEY, EVENT_DISPLAY_BRIGHTNESS, { KEY_BRIGHTNESSDOWN } }, /* Fn + down */
{KE_KEY, EVENT_AUDIO_VOLUME, { KEY_VOLUMEUP } }, /* Fn + right */
--
2.5.0
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