From cc3ece1da4f1d6b8742805770f18488183f8ad02 Mon Sep 17 00:00:00 2001 From: Laszlo Agocs Date: Thu, 17 Oct 2013 14:45:13 +0200 Subject: [PATCH] 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 --- .../input/evdevtouch/qevdevtouch.cpp | 15 +++++++++++++++ 1 file changed, 15 insertions(+) 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);