linux-kernel - [PATCH v3] Our HID device need KEY_CAMERA

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Message-Id: <9a85b268c7636ef2e4e3bbbe318561ba2842a591.1676536357.git.fengqi@xiaomi.com>
Date:   Thu, 16 Feb 2023 16:35:42 +0800
From:   Qi Feng <fengqi706@...il.com>
To:     jikos@...nel.org
Cc:     benjamin.tissoires@...hat.com, linux-input@...r.kernel.org,
        linux-kernel@...r.kernel.org, fengqi <fengqi@...omi.com>
Subject: [PATCH v3] Our HID device need KEY_CAMERA_FOCUS event to control camera,

From: fengqi <fengqi@...omi.com>

but this event is non-existent in current HID driver.

So we add this event in hid-input.c

Signed-off-by: fengqi <fengqi@...omi.com>

---

changes in v3:

-add HID_UP_CAMERA in HID usage tables , Then add the mapping under HID_UP_CAMERA

-modify the commit log of patch

-Link to v2:https://lore.kernel.org/linux-input/CACOZ=ZU0zgRmoRu8X5bMUzUrXA9x-qoDJqrQroUs=+qKR58MQA@mail.gmail.com/T/#t
-Link to v1:https://lore.kernel.org/linux-input/CACOZ=ZWB3grJKn7wAZEZ0BDyN7KJF4VWUTNs-mPxeoW_oiR7=g@mail.gmail.com/T/#t

---
---
 drivers/hid/hid-input.c | 10 ++++++++++
 include/linux/hid.h     |  1 +
 2 files changed, 11 insertions(+)

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 77c8c49852b5..c6098ae2fac7 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -1225,6 +1225,16 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
 			return;
 		}
 		goto unknown;
+	case HID_UP_CAMERA:
+		switch (usage->hid & HID_USAGE) {
+		case 0x020:
+			map_key_clear(KEY_CAMERA_FOCUS);	break;
+		case 0x021:
+			map_key_clear(KEY_CAMERA);		break;
+		default:
+			goto ignore;
+		}
+		break;
 
 	case HID_UP_HPVENDOR:	/* Reported on a Dutch layout HP5308 */
 		set_bit(EV_REP, input->evbit);
diff --git a/include/linux/hid.h b/include/linux/hid.h
index 8677ae38599e..88793b77bd63 100644
--- a/include/linux/hid.h
+++ b/include/linux/hid.h
@@ -155,6 +155,7 @@ struct hid_item {
 #define HID_UP_DIGITIZER	0x000d0000
 #define HID_UP_PID		0x000f0000
 #define HID_UP_BATTERY		0x00850000
+#define HID_UP_CAMERA		0x00900000
 #define HID_UP_HPVENDOR         0xff7f0000
 #define HID_UP_HPVENDOR2        0xff010000
 #define HID_UP_MSVENDOR		0xff000000
-- 
2.39.0