Touchscreen firmware of ASUS Transformer TF700T reports zeros for the phys
size. Hence check whether the size is zero and don't set the resolution in
this case.
Reported-by: Jasper Korten <jja2000@xxxxxxxxx>
Signed-off-by: Dmitry Osipenko <digetx@xxxxxxxxx>
---
Please note that ASUS TF700T isn't yet supported by upstream kernel,
hence this is not a critical fix.
drivers/input/touchscreen/elants_i2c.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/input/touchscreen/elants_i2c.c b/drivers/input/touchscreen/elants_i2c.c
index 4c2b579f6c8b..a2e1cc4192b0 100644
--- a/drivers/input/touchscreen/elants_i2c.c
+++ b/drivers/input/touchscreen/elants_i2c.c
@@ -1441,14 +1441,16 @@ static int elants_i2c_probe(struct i2c_client *client,
touchscreen_parse_properties(ts->input, true, &ts->prop);
- if (ts->chip_id == EKTF3624) {
+ if (ts->chip_id == EKTF3624 && ts->phy_x && ts->phy_y) {
/* calculate resolution from size */
ts->x_res = DIV_ROUND_CLOSEST(ts->prop.max_x, ts->phy_x);
ts->y_res = DIV_ROUND_CLOSEST(ts->prop.max_y, ts->phy_y);
}
- input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
- input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
+ if (ts->x_res > 0)
+ input_abs_set_res(ts->input, ABS_MT_POSITION_X, ts->x_res);
+ if (ts->y_res > 0)
+ input_abs_set_res(ts->input, ABS_MT_POSITION_Y, ts->y_res);
if (ts->major_res > 0)
input_abs_set_res(ts->input, ABS_MT_TOUCH_MAJOR, ts->major_res);
--
2.29.2
