linux-kernel - [PATCH v4 4/5] dell-wmi: properly process Dell Instant Launch hotkey

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Message-Id: <1456298416-29683-5-git-send-email-kernel@kempniu.pl>
Date:	Wed, 24 Feb 2016 08:20:14 +0100
From:	Michał Kępień <kernel@...pniu.pl>
To:	Matthew Garrett <mjg59@...f.ucam.org>,
	Pali Rohár <pali.rohar@...il.com>,
	Darren Hart <dvhart@...radead.org>
Cc:	Darek Stojaczyk <darek.stojaczyk@...il.com>,
	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 4/5] dell-wmi: properly process Dell Instant Launch hotkey

On models on which an SMBIOS request needs to be issued in order for WMI
events to be generated, pressing the Dell Instant Launch hotkey does not
raise an i8042 interrupt - only a WMI event is generated (0xe025 on Dell
Vostro V131).  Thus, the 0xe025 event should only be ignored on machines
which do not require an SMBIOS request for enabling WMI.

Signed-off-by: Michał Kępień <kernel@...pniu.pl>
---
 drivers/platform/x86/dell-wmi.c |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/dell-wmi.c b/drivers/platform/x86/dell-wmi.c
index 65edd93..ffc957b5 100644
--- a/drivers/platform/x86/dell-wmi.c
+++ b/drivers/platform/x86/dell-wmi.c
@@ -111,7 +111,7 @@ static const struct key_entry dell_wmi_legacy_keymap[] __initconst = {
 	{ KE_IGNORE, 0xe020, { KEY_MUTE } },
 
 	/* Shortcut and audio panel keys */
-	{ KE_IGNORE, 0xe025, { KEY_RESERVED } },
+	{ KE_KEY, 0xe025, { KEY_PROG4 } },
 	{ KE_IGNORE, 0xe026, { KEY_RESERVED } },
 
 	{ KE_IGNORE, 0xe02e, { KEY_VOLUMEDOWN } },
@@ -235,6 +235,9 @@ static void dell_wmi_process_key(int reported_key)
 	    acpi_video_handles_brightness_key_presses())
 		return;
 
+	if (key->keycode == KEY_PROG4 && !wmi_requires_smbios_request)
+		return;
+
 	sparse_keymap_report_entry(dell_wmi_input_dev, key, 1, true);
 }
 
-- 
1.7.10.4