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Hans de Goede d9265e8a87 Input: of_touchscreen - add support for touchscreen-min-x|y
Some touchscreens, depending on the firmware and/or the digitizer, report
coordinates which never reach 0 along one or both of their axis.

This has been seen for example on the Silead touchscreens on a Onda V891w
and a Point of View mobii TAB-P800w(v2.0).

This commit adds support for touchscreen-min-x and touchscreen-min-y
device-properties which can be set to communicate the actual start
coordinates (rather then 0,0) to userspace.

This commit also drop the "(in pixels)" comment from the documentation
of the touchscreen-size-x and touchscreen-size-y properties. The comment
suggested that there is a relation between the range of reported
coordinates and the display resolution, which is only true for some
devices. The "(in pixels)" comment is replaced with "(maximum x coordinate
reported + 1)" to mirror the language describing the new touchscreen-min-x
and -min-y properties.

When set this fixes e.g. not being able to click things in the GNOME3
top-bar on the 2 example tablets.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2018-10-11 17:16:42 -07:00
arch Final MIPS fixes for 4.17 2018-06-02 10:12:23 -07:00
block
certs
crypto
Documentation Input: of_touchscreen - add support for touchscreen-min-x|y 2018-10-11 17:16:42 -07:00
drivers Input: of_touchscreen - add support for touchscreen-min-x|y 2018-10-11 17:16:42 -07:00
firmware
fs Merge branch 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs 2018-06-03 11:01:28 -07:00
include Merge branch 'ib/4.17-bitmap' into next 2018-08-01 17:58:55 -07:00
init
ipc
kernel Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-03 09:01:41 -07:00
lib bitmap: Add bitmap_alloc(), bitmap_zalloc() and bitmap_free() 2018-08-01 15:49:40 -07:00
LICENSES
mm mm: fix the NULL mapping case in __isolate_lru_page() 2018-06-02 09:33:47 -07:00
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2018-06-02 17:35:53 -07:00
samples
scripts
security
sound
tools Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2018-06-03 08:58:59 -07:00
usr
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MAINTAINERS Input: Fix DIR-685 touchkeys MAINTAINERS entry 2018-10-10 17:42:24 -07:00
Makefile Linux 4.17 2018-06-03 14:15:21 -07:00
README

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.