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Subject[PATCH 4.19 26/81] HID: i2c-hid: reset Synaptics SYNA2393 on resume
Date
From: Daniel Playfair Cal <daniel.playfair.cal@gmail.com>

[ Upstream commit 538f67407e2c0e5ed2a46e7d7ffa52f2e30c7ef8 ]

On the Dell XPS 9570, the Synaptics SYNA2393 touchpad generates spurious
interrupts after resuming from suspend until it receives some input or
is reset. Add it to the quirk I2C_HID_QUIRK_RESET_ON_RESUME so that it
is reset when resuming from suspend.

More information about the bug can be found in this mailing list
discussion: https://www.spinics.net/lists/linux-input/msg59530.html

Signed-off-by: Daniel Playfair Cal <daniel.playfair.cal@gmail.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hid/hid-ids.h | 3 +++
drivers/hid/i2c-hid/i2c-hid-core.c | 2 ++
2 files changed, 5 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 2a9cec9764cf..e071fd3c6b2b 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -1064,6 +1064,9 @@
#define USB_DEVICE_ID_SYMBOL_SCANNER_2 0x1300
#define USB_DEVICE_ID_SYMBOL_SCANNER_3 0x1200

+#define I2C_VENDOR_ID_SYNAPTICS 0x06cb
+#define I2C_PRODUCT_ID_SYNAPTICS_SYNA2393 0x7a13
+
#define USB_VENDOR_ID_SYNAPTICS 0x06cb
#define USB_DEVICE_ID_SYNAPTICS_TP 0x0001
#define USB_DEVICE_ID_SYNAPTICS_INT_TP 0x0002
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index f2c8c59fc582..f17ebbe53abf 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -187,6 +187,8 @@ static const struct i2c_hid_quirks {
I2C_HID_QUIRK_BOGUS_IRQ },
{ USB_VENDOR_ID_ALPS_JP, HID_ANY_ID,
I2C_HID_QUIRK_RESET_ON_RESUME },
+ { I2C_VENDOR_ID_SYNAPTICS, I2C_PRODUCT_ID_SYNAPTICS_SYNA2393,
+ I2C_HID_QUIRK_RESET_ON_RESUME },
{ USB_VENDOR_ID_ITE, I2C_DEVICE_ID_ITE_LENOVO_LEGION_Y720,
I2C_HID_QUIRK_BAD_INPUT_SIZE },
{ 0, 0 }
--
2.25.1


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