[PATCH 3/3] evdev: Implement axes swapping for absolute events

[Rob Bradford]

From: Rob Bradford <rob at linux.intel.com>

This quirk is designed for hardware that has the X and Y axes swapped for
absolute events. Do this by rewriting the event such that the X and Y events
are swapped.
---
 src/evdev.c | 29 +++++++++++++++++++++++++----
 1 file changed, 25 insertions(+), 4 deletions(-)

diff --git a/src/evdev.c b/src/evdev.c
index 8848736..344974f 100644
--- a/src/evdev.c
+++ b/src/evdev.c
@@ -129,6 +129,17 @@ evdev_process_absolute_motion(struct evdev_device *device,
 	const int screen_width = device->output->current->width;
 	const int screen_height = device->output->current->height;
 
+	if (device->quirks & EVDEV_QUIRK_SWAP_AXES) {
+		switch (e->code) {
+		case ABS_X:
+			e->code = ABS_Y;
+			break;
+		case ABS_Y:
+			e->code = ABS_X;
+			break;
+		}
+	}
+
 	switch (e->code) {
 	case ABS_X:
 		device->abs.x =
@@ -395,12 +406,22 @@ evdev_configure_device(struct evdev_device *device)
 		if (TEST_BIT(abs_bits, ABS_MT_SLOT)) {
 			ioctl(device->fd, EVIOCGABS(ABS_MT_POSITION_X),
 			      &absinfo);
-			device->abs.min_x = absinfo.minimum;
-			device->abs.max_x = absinfo.maximum;
+			if (device->quirks & EVDEV_QUIRK_SWAP_AXES) {
+				device->abs.min_y = absinfo.minimum;
+				device->abs.max_y = absinfo.maximum;
+			} else {
+				device->abs.min_x = absinfo.minimum;
+				device->abs.max_x = absinfo.maximum;
+			}
 			ioctl(device->fd, EVIOCGABS(ABS_MT_POSITION_Y),
 			      &absinfo);
-			device->abs.min_y = absinfo.minimum;
-			device->abs.max_y = absinfo.maximum;
+			if (device->quirks & EVDEV_QUIRK_SWAP_AXES) {
+				device->abs.min_x = absinfo.minimum;
+				device->abs.max_x = absinfo.maximum;
+			} else {
+				device->abs.min_y = absinfo.minimum;
+				device->abs.max_y = absinfo.maximum;
+			}
 			device->is_mt = 1;
 			device->mt.slot = 0;
 			device->caps |= EVDEV_TOUCH;
-- 
1.7.11.2