linux-kernel - [PATCH v1 2/2] HID: i2c-hid: introduce qtec vendor, enable re-power-on quirk

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Message-ID: <20240925100303.9112-3-alex.vinarskis@gmail.com>
Date: Wed, 25 Sep 2024 12:02:00 +0200
From: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
To: Jiri Kosina <jikos@...nel.org>,
	linux-input@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Benjamin Tissoires <bentiss@...nel.org>,
	Aleksandrs Vinarskis <alex.vinarskis@...il.com>
Subject: [PATCH v1 2/2] HID: i2c-hid: introduce qtec vendor, enable re-power-on quirk

This solves keyboard not working until suspend&resume issue  on Dell XPS
9345 13" (codenamed 'tributo').

Signed-off-by: Aleksandrs Vinarskis <alex.vinarskis@...il.com>
---
 drivers/hid/hid-ids.h              | 2 ++
 drivers/hid/i2c-hid/i2c-hid-core.c | 5 +++++
 2 files changed, 7 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 72d56ee7ce1b..a99b5a138128 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1091,6 +1091,8 @@
 #define USB_VENDOR_ID_PRODIGE		0x05af
 #define USB_DEVICE_ID_PRODIGE_CORDLESS	0x3062
 
+#define I2C_VENDOR_ID_QTEC              0x6243
+
 #define USB_VENDOR_ID_QUANTA		0x0408
 #define USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH		0x3000
 #define USB_DEVICE_ID_QUANTA_OPTICAL_TOUCH_3001		0x3001
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 087ca2474176..1e4f478cf878 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -134,6 +134,11 @@ static const struct i2c_hid_quirks {
 		I2C_HID_QUIRK_BAD_INPUT_SIZE },
 	{ I2C_VENDOR_ID_CIRQUE, I2C_PRODUCT_ID_CIRQUE_1063,
 		I2C_HID_QUIRK_NO_SLEEP_ON_SUSPEND },
+	/*
+	 * Without additional power on command, at least some QTEC devices send garbage
+	 */
+	{ I2C_VENDOR_ID_QTEC, HID_ANY_ID,
+		I2C_HID_QUIRK_RE_POWER_ON },
 	/*
 	 * Sending the wakeup after reset actually break ELAN touchscreen controller
 	 */
-- 
2.43.0