linux-kernel - [PATCH 2/2] platform/x86: hp-wmi: Add HP Envy special key support

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Message-Id: <20230425202219.7511-1-jes965@nyu.edu>
Date:   Tue, 25 Apr 2023 16:22:18 -0400
From:   Jonathan Singer <jes965@....edu>
To:     platform-driver-x86@...r.kernel.org
Cc:     Jonathan Singer <jes965@....edu>,
        Hans de Goede <hdegoede@...hat.com>,
        Mark Gross <markgross@...nel.org>,
        Jorge Lopez <jorge.lopez2@...com>,
        Kai-Heng Feng <kai.heng.feng@...onical.com>,
        Rishit Bansal <rishitbansal0@...il.com>,
        Daniel Houldsworth <dhould3@...il.com>,
        Barnabás Pőcze <pobrn@...tonmail.com>,
        linux-kernel@...r.kernel.org
Subject: [PATCH 2/2] platform/x86: hp-wmi: Add HP Envy special key support

Previously, some support for certain keys on the HP keyboard has been
added already in commit 3ee5447b2048 ("platform/x86: hp-wmi: Handle Omen
Key event"), however this as tested did not allow even the fn+esc key on
my HP Envy which uses the same keycode on my HP Envy x360 laptop to work
--the keycode rather than being passed in as a separate int from WMI, was
being passed in as the event_data for the HPWMI_OMEN_KEY event.

This patch, as tested was able to properly get the keycode for fn+esc,
and for fn+f12 which is supposed to be a programmable key according to
HP's keyboard diagram and is thus mapped to KEY_PROG2. The fn+f8 key
combination (mute microphone) was a standard HPWMI_BEZEL_BUTTON key,
however it did not previously have an entry in the sparse keymap. This
patch preserves the original HPWMI_OMEN_KEY behavior for laptops that
use it by only taking the keycode from the event_data only when the 
event_data is nonzero.

Signed-off-by: Jonathan Singer <jes965@....edu>
---
 drivers/platform/x86/hp/hp-wmi.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/platform/x86/hp/hp-wmi.c b/drivers/platform/x86/hp/hp-wmi.c
index b27362209b04..b61185fc0d8a 100644
--- a/drivers/platform/x86/hp/hp-wmi.c
+++ b/drivers/platform/x86/hp/hp-wmi.c
@@ -212,6 +212,7 @@ struct bios_rfkill2_state {
 static const struct key_entry hp_wmi_keymap[] = {
 	{ KE_KEY, 0x02,    { KEY_BRIGHTNESSUP } },
 	{ KE_KEY, 0x03,    { KEY_BRIGHTNESSDOWN } },
+	{ KE_KEY, 0x270,   { KEY_MICMUTE } },
 	{ KE_KEY, 0x20e6,  { KEY_PROG1 } },
 	{ KE_KEY, 0x20e8,  { KEY_MEDIA } },
 	{ KE_KEY, 0x2142,  { KEY_MEDIA } },
@@ -222,6 +223,7 @@ static const struct key_entry hp_wmi_keymap[] = {
 	{ KE_IGNORE, 0x121a4, }, /* Win Lock Off */
 	{ KE_KEY, 0x21a5,  { KEY_PROG2 } }, /* HP Omen Key */
 	{ KE_KEY, 0x21a7,  { KEY_FN_ESC } },
+	{ KE_KEY, 0x21a8,  { KEY_PROG2 } }, /* HP Envy x360 programmable key */
 	{ KE_KEY, 0x21a9,  { KEY_TOUCHPAD_OFF } },
 	{ KE_KEY, 0x121a9, { KEY_TOUCHPAD_ON } },
 	{ KE_KEY, 0x231b,  { KEY_HELP } },
@@ -816,11 +818,20 @@ static void hp_wmi_notify(u32 value, void *context)
 	case HPWMI_SMART_ADAPTER:
 		break;
 	case HPWMI_BEZEL_BUTTON:
-	case HPWMI_OMEN_KEY:
 		key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
 		if (key_code < 0)
 			break;
 
+		if (!sparse_keymap_report_event(hp_wmi_input_dev,
+						key_code, 1, true))
+			pr_info("Unknown key code - 0x%x\n", key_code);
+		break;
+	case HPWMI_OMEN_KEY:
+		if (event_data) /* Only should be true for HP Omen */
+			key_code = event_data;
+		else
+			key_code = hp_wmi_read_int(HPWMI_HOTKEY_QUERY);
+
 		if (!sparse_keymap_report_event(hp_wmi_input_dev,
 						key_code, 1, true))
 			pr_info("Unknown key code - 0x%x\n", key_code);
-- 
2.40.0