From c388533d33b7b4822f423effe87de7fe6d0a7ede Mon Sep 17 00:00:00 2001
From: Chris <codewalker@hardkernel.com>
Date: Mon, 27 Mar 2023 12:14:55 +0900
Subject: [PATCH] ODROID-M1: Add flipped x, y axis.

Change-Id: Iad87c8dcc3826414330087405d95f3053de8fb38
---
 drivers/hid/hid-multitouch.c | 44 ++++++++++++++++++++++++++++++++++--
 1 file changed, 42 insertions(+), 2 deletions(-)

diff --git a/drivers/hid/hid-multitouch.c b/drivers/hid/hid-multitouch.c
index a78ce16d4782..ed7706f5ac9f 100644
--- a/drivers/hid/hid-multitouch.c
+++ b/drivers/hid/hid-multitouch.c
@@ -874,6 +874,36 @@ static int mt_touch_input_mapping(struct hid_device *hdev, struct hid_input *hi,
 	return 0;
 }
 
+#if defined(CONFIG_ARCH_ROCKCHIP_ODROID_COMMON)
+bool touch_flip_x = false;
+static int __init touch_flip_x_para_setup(char *s)
+{
+	if (!strncmp(s, "true", 4))
+		touch_flip_x = true;
+	else {
+		pr_err("%s - wrong touch_flip_x parameter", __func__);
+		touch_flip_x = true;
+	}
+
+	return 0;
+}
+__setup("touch_flip_x=", touch_flip_x_para_setup);
+
+bool touch_flip_y = false;
+static int __init touch_flip_y_para_setup(char *s)
+{
+	if (!strncmp(s, "true", 4))
+		touch_flip_y = true;
+	else {
+		pr_err("%s - wrong touch_flip_y parameter", __func__);
+		touch_flip_y = true;
+	}
+
+	return 0;
+}
+__setup("touch_flip_y=", touch_flip_y_para_setup);
+#endif
+
 static int mt_compute_slot(struct mt_device *td, struct mt_application *app,
 			   struct mt_usages *slot,
 			   struct input_dev *input)
@@ -1084,8 +1114,18 @@ static int mt_process_slot(struct mt_device *td, struct input_dev *input,
 			minor = minor >> 1;
 		}
 
-		input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
-		input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
+#if defined(CONFIG_ARCH_ROCKCHIP_ODROID_COMMON)
+		if (touch_flip_x)
+			input_event(input, EV_ABS, ABS_MT_POSITION_X, input->absinfo[0].maximum - *slot->x);
+		else
+#endif
+			input_event(input, EV_ABS, ABS_MT_POSITION_X, *slot->x);
+#if defined(CONFIG_ARCH_ROCKCHIP_ODROID_COMMON)
+		if (touch_flip_y)
+			input_event(input, EV_ABS, ABS_MT_POSITION_Y, input->absinfo[1].maximum - *slot->y);
+		else
+#endif
+			input_event(input, EV_ABS, ABS_MT_POSITION_Y, *slot->y);
 		input_event(input, EV_ABS, ABS_MT_TOOL_X, *slot->cx);
 		input_event(input, EV_ABS, ABS_MT_TOOL_Y, *slot->cy);
 		input_event(input, EV_ABS, ABS_MT_DISTANCE, !*slot->tip_state);