[PATCH 4.14 008/217] Input: synaptics-rmi4 - fix axis-swap behavior

Greg Kroah-Hartman
2018-08-23T08:18:46Z

From: Lucas Stach <l.stach@pengutronix.de>

[ Upstream commit 645a397d325db6e1bb36588095ae637738b37693 ]

The documentation for the touchscreen-swapped-x-y property states that
swapping is done after inverting if both are used. RMI4 did it the other
way around, leading to inconsistent behavior with regard to other
touchscreens.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Tested-by: Nick Dyer <nick@shmanahar.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/input/rmi4/rmi_2d_sensor.c | 34 ++++++++++++++++------------------
1 file changed, 16 insertions(+), 18 deletions(-)

--- a/drivers/input/rmi4/rmi_2d_sensor.c
+++ b/drivers/input/rmi4/rmi_2d_sensor.c
@@ -32,15 +32,15 @@ void rmi_2d_sensor_abs_process(struct rm
if (obj->type == RMI_2D_OBJECT_NONE)
return;

- if (axis_align->swap_axes)
- swap(obj->x, obj->y);
-
if (axis_align->flip_x)
obj->x = sensor->max_x - obj->x;

if (axis_align->flip_y)
obj->y = sensor->max_y - obj->y;

+ if (axis_align->swap_axes)
+ swap(obj->x, obj->y);
+
/*
* Here checking if X offset or y offset are specified is
* redundant. We just add the offsets or clip the values.
@@ -120,15 +120,15 @@ void rmi_2d_sensor_rel_report(struct rmi
x = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)x));
y = min(RMI_2D_REL_POS_MAX, max(RMI_2D_REL_POS_MIN, (int)y));

- if (axis_align->swap_axes)
- swap(x, y);
-
if (axis_align->flip_x)
x = min(RMI_2D_REL_POS_MAX, -x);

if (axis_align->flip_y)
y = min(RMI_2D_REL_POS_MAX, -y);

+ if (axis_align->swap_axes)
+ swap(x, y);
+
if (x || y) {
input_report_rel(sensor->input, REL_X, x);
input_report_rel(sensor->input, REL_Y, y);
@@ -141,17 +141,10 @@ static void rmi_2d_sensor_set_input_para
struct input_dev *input = sensor->input;
int res_x;
int res_y;
+ int max_x, max_y;
int input_flags = 0;

if (sensor->report_abs) {
- if (sensor->axis_align.swap_axes) {
- swap(sensor->max_x, sensor->max_y);
- swap(sensor->axis_align.clip_x_low,
- sensor->axis_align.clip_y_low);
- swap(sensor->axis_align.clip_x_high,
- sensor->axis_align.clip_y_high);
- }
-
sensor->min_x = sensor->axis_align.clip_x_low;
if (sensor->axis_align.clip_x_high)
sensor->max_x = min(sensor->max_x,
@@ -163,14 +156,19 @@ static void rmi_2d_sensor_set_input_para
sensor->axis_align.clip_y_high);

set_bit(EV_ABS, input->evbit);
- input_set_abs_params(input, ABS_MT_POSITION_X, 0, sensor->max_x,
- 0, 0);
- input_set_abs_params(input, ABS_MT_POSITION_Y, 0, sensor->max_y,
- 0, 0);
+
+ max_x = sensor->max_x;
+ max_y = sensor->max_y;
+ if (sensor->axis_align.swap_axes)
+ swap(max_x, max_y);
+ input_set_abs_params(input, ABS_MT_POSITION_X, 0, max_x, 0, 0);
+ input_set_abs_params(input, ABS_MT_POSITION_Y, 0, max_y, 0, 0);

if (sensor->x_mm && sensor->y_mm) {
res_x = (sensor->max_x - sensor->min_x) / sensor->x_mm;
res_y = (sensor->max_y - sensor->min_y) / sensor->y_mm;
+ if (sensor->axis_align.swap_axes)
+ swap(res_x, res_y);

input_abs_set_res(input, ABS_X, res_x);
input_abs_set_res(input, ABS_Y, res_y);