linux-kernel - [PATCH] Input: vmmouse - add macros to enable vmmouse relative mode

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Message-Id: <20230413085635.2515647-1-zhouzongmin@kylinos.cn>
Date:   Thu, 13 Apr 2023 16:56:35 +0800
From:   Zongmin Zhou <zhouzongmin@...inos.cn>
To:     zackr@...are.com, linux-graphics-maintainer@...are.com,
        pv-drivers@...are.com, dmitry.torokhov@...il.com
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
        Zongmin Zhou <zhouzongmin@...inos.cn>
Subject: [PATCH] Input: vmmouse - add macros to enable vmmouse relative mode

Add macros to enable request relative mode.

Change the REL_Y value passed by input_report_rel function,
to match the direction of mouse movement.

Signed-off-by: Zongmin Zhou<zhouzongmin@...inos.cn>
---
 drivers/input/mouse/vmmouse.c | 13 ++++++++++++-
 1 file changed, 12 insertions(+), 1 deletion(-)

diff --git a/drivers/input/mouse/vmmouse.c b/drivers/input/mouse/vmmouse.c
index ea9eff7c8099..f39ce21f7af9 100644
--- a/drivers/input/mouse/vmmouse.c
+++ b/drivers/input/mouse/vmmouse.c
@@ -21,6 +21,12 @@
 #include "psmouse.h"
 #include "vmmouse.h"
 
+/*
+ * Enable this to request relative mode.
+ * Defaut to absolute mode.
+ */
+//#define VMMOUSE_RELATIVE_MODE
+
 #define VMMOUSE_PROTO_MAGIC			0x564D5868U
 
 /*
@@ -184,7 +190,7 @@ static psmouse_ret_t vmmouse_report_events(struct psmouse *psmouse)
 		if (status & VMMOUSE_RELATIVE_PACKET) {
 			pref_dev = rel_dev;
 			input_report_rel(rel_dev, REL_X, (s32)x);
-			input_report_rel(rel_dev, REL_Y, -(s32)y);
+			input_report_rel(rel_dev, REL_Y, (s32)y);
 		} else {
 			pref_dev = abs_dev;
 			input_report_abs(abs_dev, ABS_X, x);
@@ -304,8 +310,13 @@ static int vmmouse_enable(struct psmouse *psmouse)
 	VMMOUSE_CMD(ABSPOINTER_RESTRICT, VMMOUSE_RESTRICT_CPL0,
 		    dummy1, dummy2, dummy3, dummy4);
 
+#ifdef VMMOUSE_RELATIVE_MODE
+	VMMOUSE_CMD(ABSPOINTER_COMMAND, VMMOUSE_CMD_REQUEST_RELATIVE,
+		    dummy1, dummy2, dummy3, dummy4);
+#else
 	VMMOUSE_CMD(ABSPOINTER_COMMAND, VMMOUSE_CMD_REQUEST_ABSOLUTE,
 		    dummy1, dummy2, dummy3, dummy4);
+#endif
 
 	return 0;
 }
-- 
2.34.1


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