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Input: st1232 - fix reporting multitouch coordinates

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For Sitronix st1633 multi-touch controller driver the coordinates reported
for multiple fingers were wrong, as it was always taking LSB of coordinates
from the first contact data.

Signed-off-by: Dixit Parmar <dixitparmar19@gmail.com>
Reviewed-by: Martin Kepplinger <martink@posteo.de>
Cc: stable@vger.kernel.org
Fixes: 351e0592bf ("Input: st1232 - add support for st1633")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204561
Link: https://lore.kernel.org/r/1566209314-21767-1-git-send-email-dixitparmar19@gmail.com
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
This commit is contained in:
Dixit Parmar 2019-10-21 09:32:47 -07:00 committed by Dmitry Torokhov
parent c324345ce8
commit b1a402e75a
1 changed files with 4 additions and 2 deletions
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6
drivers/input/touchscreen/st1232.c
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@ -81,8 +81,10 @@ static int st1232_ts_read_data(struct st1232_ts_data *ts)
for (i = 0, y = 0; i < ts->chip_info->max_fingers; i++, y += 3) {
finger[i].is_valid = buf[i + y] >> 7;
if (finger[i].is_valid) {
finger[i].x = ((buf[i + y] & 0x0070) << 4) | buf[i + 1];
finger[i].y = ((buf[i + y] & 0x0007) << 8) | buf[i + 2];
finger[i].x = ((buf[i + y] & 0x0070) << 4) |
buf[i + y + 1];
finger[i].y = ((buf[i + y] & 0x0007) << 8) |
buf[i + y + 2];
/* st1232 includes a z-axis / touch strength */
if (ts->chip_info->have_z)