Workaround for touchscreen drivers with no ABS_MT_TOUCH_MAJOR event

[Alexander Varnin]

This plugin relies on ABS_MT_TOUCH_MAJOR event, that is optional, and not all drivers have it. The plugin doesn't work with such drivers, but this is easy to workaround. Here is a simple patch:

--- a/plugins/mtinput-raw.c 2014-09-01 22:42:19.000000000 +0400
+++ b/plugins/mtinput-raw.c 2014-09-01 22:42:42.000000000 +0400
@@ -136,8 +136,7 @@ static int check_fd(struct tslib_mtinput
        return rc;

    if ( ( 0 == test_bit(ABS_MT_POSITION_X, absbits) ) ||
-        ( 0 == test_bit(ABS_MT_POSITION_Y, absbits) ) ||
-        ( 0 == test_bit(ABS_MT_TOUCH_MAJOR, absbits) ) 
+        ( 0 == test_bit(ABS_MT_POSITION_Y, absbits) ) 
         )
    {
        fprintf(stderr, "error: could not support the device\n");
@@ -180,7 +179,7 @@ int PushSample( struct tslib_mtinput * i
        }
        samp[num].x = i->current_x[islot];
        samp[num].y = i->current_y[islot];
-       samp[num].pressure = i->current_p[islot];
+       samp[num].pressure = 100;//i->current_p[islot];
        samp[num].tv = ev->time;
        i->current_x_filled[islot] = 0;
        num++;

[Martin Kepplinger]

this isn't tslib's project page. tslib lives on github. just so you know in case of any questions.