linux-kernel - [PATCH 5.4 081/215] Input: goodix - fix touch coordinates on Cube I15-TC

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Date:   Mon, 20 Jul 2020 17:36:03 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, "Sergei A. Trusov" <sergei.a.trusov@...ru>,
        Bastien Nocera <hadess@...ess.net>,
        Dmitry Torokhov <dmitry.torokhov@...il.com>,
        Sasha Levin <sashal@...nel.org>, Arkadiy <arkan49@...dex.ru>
Subject: [PATCH 5.4 081/215] Input: goodix - fix touch coordinates on Cube I15-TC

From: Sergei A. Trusov <sergei.a.trusov@...ru>

[ Upstream commit 1dd5ddc125b4625c3beb8e644ae872445d739bbc ]

The touchscreen on the Cube I15-TC don't match the default display,
with 0,0 touches being reported when touching at the top-right of
the screen.

Add a quirk to invert the x coordinate.

Reported-and-tested-by: Arkadiy <arkan49@...dex.ru>
Signed-off-by: Sergei A. Trusov <sergei.a.trusov@...ru>
Reviewed-by: Bastien Nocera <hadess@...ess.net>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/input/touchscreen/goodix.c | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

diff --git a/drivers/input/touchscreen/goodix.c b/drivers/input/touchscreen/goodix.c
index 0403102e807e1..37b35ab97beb2 100644
--- a/drivers/input/touchscreen/goodix.c
+++ b/drivers/input/touchscreen/goodix.c
@@ -168,6 +168,22 @@ static const struct dmi_system_id nine_bytes_report[] = {
 	{}
 };
 
+/*
+ * Those tablets have their x coordinate inverted
+ */
+static const struct dmi_system_id inverted_x_screen[] = {
+#if defined(CONFIG_DMI) && defined(CONFIG_X86)
+	{
+		.ident = "Cube I15-TC",
+		.matches = {
+			DMI_MATCH(DMI_SYS_VENDOR, "Cube"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "I15-TC")
+		},
+	},
+#endif
+	{}
+};
+
 /**
  * goodix_i2c_read - read data from a register of the i2c slave device.
  *
@@ -780,6 +796,12 @@ static int goodix_configure_dev(struct goodix_ts_data *ts)
 			"Non-standard 9-bytes report format quirk\n");
 	}
 
+	if (dmi_check_system(inverted_x_screen)) {
+		ts->prop.invert_x = true;
+		dev_dbg(&ts->client->dev,
+			"Applying 'inverted x screen' quirk\n");
+	}
+
 	error = input_mt_init_slots(ts->input_dev, ts->max_touch_num,
 				    INPUT_MT_DIRECT | INPUT_MT_DROP_UNUSED);
 	if (error) {
-- 
2.25.1