Invert Y is needed (together with swap XY) for some touchscreens : - LeadingTouch screens (at least for some of them) - CarTft 8in4 (USB ID=0eef:0001) Signed-off-by: Ondrej Zary <linux@xxxxxxxxxxxxxxxxxxxx> Bug-Link: https://bugs.tizen.org/jira/browse/TC-2522 Cc: linux-input@xxxxxxxxxxxxxxx Cc: linux-kernel@xxxxxxxxxxxxxxx Signed-off-by: Philippe Coval <philippe.coval@xxxxxxxxxxxxxxxxxxx> --- ChangeLog: * v1: Initial version from me : Rebased on v4.1.0-rc6 https://lkml.org/lkml/2015/6/7/191 Note it is based on Ondrej Zary's patch (2007): https://www.mail-archive.com/linux-kernel@xxxxxxxxxxxxxxx/msg136266.html Test demo on tizen cartft 8inch4 : https://www.youtube.com/watch?v=4L9Bjfy8oDM * v2: Use bool not int for options variables Rebased on v4.2-rc2 Latest unmerged version can be picked from : https://github.com/rzr/linux/tree/for-upstream drivers/input/touchscreen/usbtouchscreen.c | 23 +++++++++++++++++++---- 1 file changed, 19 insertions(+), 4 deletions(-) diff --git a/drivers/input/touchscreen/usbtouchscreen.c b/drivers/input/touchscreen/usbtouchscreen.c index f2c6c35..af7e6f3 100644 --- a/drivers/input/touchscreen/usbtouchscreen.c +++ b/drivers/input/touchscreen/usbtouchscreen.c @@ -63,6 +63,12 @@ static bool swap_xy; module_param(swap_xy, bool, 0644); MODULE_PARM_DESC(swap_xy, "If set X and Y axes are swapped."); +static int invert_x; +module_param(invert_x, bool, 0644); +MODULE_PARM_DESC(invert_x, "Invert X axis."); +static int invert_y; +module_param(invert_y, bool, 0644); +MODULE_PARM_DESC(invert_y, "Invert Y axis."); static bool hwcalib_xy; module_param(hwcalib_xy, bool, 0644); @@ -1303,6 +1309,7 @@ static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, unsigned char *pkt, int len) { struct usbtouch_device_info *type = usbtouch->type; + int x, y; if (!type->read_data(usbtouch, pkt)) return; @@ -1310,12 +1317,20 @@ static void usbtouch_process_pkt(struct usbtouch_usb *usbtouch, input_report_key(usbtouch->input, BTN_TOUCH, usbtouch->touch); if (swap_xy) { - input_report_abs(usbtouch->input, ABS_X, usbtouch->y); - input_report_abs(usbtouch->input, ABS_Y, usbtouch->x); + x = usbtouch->y; + y = usbtouch->x; } else { - input_report_abs(usbtouch->input, ABS_X, usbtouch->x); - input_report_abs(usbtouch->input, ABS_Y, usbtouch->y); + x = usbtouch->x; + y = usbtouch->y; } + if (invert_x) + x = type->max_xc - x + type->min_xc; + if (invert_y) + y = type->max_yc - y + type->min_yc; + + input_report_abs(usbtouch->input, ABS_X, x); + input_report_abs(usbtouch->input, ABS_Y, y); + if (type->max_press) input_report_abs(usbtouch->input, ABS_PRESSURE, usbtouch->press); input_sync(usbtouch->input); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
