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    • Hans de Goede's avatar
      Input: of_touchscreen - add support for touchscreen-min-x|y · d9265e8a
      Hans de Goede authored
      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: default avatarHans de Goede <hdegoede@redhat.com>
      Reviewed-by: default avatarRob Herring <robh@kernel.org>
      Signed-off-by: default avatarDmitry Torokhov <dmitry.torokhov@gmail.com>
      d9265e8a
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