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authorLaszlo Agocs <laszlo.agocs@digia.com>2013-10-17 14:45:13 +0200
committerThe Qt Project <gerrit-noreply@qt-project.org>2013-10-17 20:53:09 +0200
commitcc3ece1da4f1d6b8742805770f18488183f8ad02 (patch)
tree1b6c51ad66a3d386d176521174fc53a9fb7c3be3 /src/platformsupport/input
parent1d3fce8b509fdb7d71f8e40ef9ed720f4dc69202 (diff)
evdevtouch: Make it work with am335x
The driver for the resistive touchscreen of these boards tends to report ABS limits 0..4095 even tough it never sends coordinates outside a certain range (e.g. approximately 165..4016 for X). This breaks the mapping of hardware coordinates to screen space. Apply a workaround to make it work properly. Change-Id: I3eb5d76002acba1972061f3add44d797349c8ec8 Reviewed-by: Andy Nichols <andy.nichols@digia.com>
Diffstat (limited to 'src/platformsupport/input')
-rw-r--r--src/platformsupport/input/evdevtouch/qevdevtouch.cpp15
1 files changed, 15 insertions, 0 deletions
diff --git a/src/platformsupport/input/evdevtouch/qevdevtouch.cpp b/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
index 3b79a2ac80..89215557c1 100644
--- a/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
+++ b/src/platformsupport/input/evdevtouch/qevdevtouch.cpp
@@ -300,6 +300,21 @@ QEvdevTouchScreenHandler::QEvdevTouchScreenHandler(const QString &specification,
qDebug("evdevtouch: device name: %s", name);
}
+ // Fix up the coordinate ranges for am335x in case the kernel driver does not have them fixed.
+ if (d->hw_name == QLatin1String("ti-tsc")) {
+ if (d->hw_range_x_min == 0 && d->hw_range_x_max == 4095) {
+ d->hw_range_x_min = 165;
+ d->hw_range_x_max = 4016;
+ }
+ if (d->hw_range_y_min == 0 && d->hw_range_y_max == 4095) {
+ d->hw_range_y_min = 220;
+ d->hw_range_y_max = 3907;
+ }
+ if (printDeviceInfo)
+ qDebug("evdevtouch: found ti-tsc, overriding: min X: %d max X: %d min Y: %d max Y: %d",
+ d->hw_range_x_min, d->hw_range_x_max, d->hw_range_y_min, d->hw_range_y_max);
+ }
+
bool grabSuccess = !ioctl(m_fd, EVIOCGRAB, (void *) 1);
if (grabSuccess)
ioctl(m_fd, EVIOCGRAB, (void *) 0);