[PATCH 0/4] Input: touchscreen - parse touchscreen-x-mm and touchscreen-y-mm properties

[Dmitry Torokhov <dmitry.torokhov@gmail.com>]

The common touchscreen device tree binding documents touchscreen-x-mm
and touchscreen-y-mm to specify the physical dimensions of the touch
surface, which userspace uses via axis resolution (units/mm) for gesture
scaling and palm rejection. However, touchscreen_parse_properties() has
not been parsing these properties.

This series teaches touchscreen_parse_properties() to read
touchscreen-x-mm and touchscreen-y-mm and calculate the corresponding X
and Y axis resolutions from the configured axis ranges, accompanied by
KUnit tests.

It also updates wacom_w9000 to drop its manual parsing of these
properties, and adjusts goodix-berlin and apple_z2 to set their fallback
resolutions before calling touchscreen_parse_properties() so firmware-
provided dimensions can override the defaults instead of being
clobbered.

Dmitry Torokhov (4):
  Input: touchscreen - parse touchscreen-x-mm and touchscreen-y-mm
  Input: wacom_w9000 - rely on touchscreen_parse_properties() for
    resolution
  Input: goodix-berlin - set default resolution before parsing
    properties
  Input: apple_z2 - set default resolution before parsing properties

 drivers/input/tests/Makefile                  |   1 +
 drivers/input/tests/touchscreen_test.c        | 209 ++++++++++++++++++
 drivers/input/touchscreen.c                   |  18 +-
 drivers/input/touchscreen/apple_z2.c          |   2 +-
 .../input/touchscreen/goodix_berlin_core.c    |   4 +-
 drivers/input/touchscreen/wacom_w9000.c       |  10 -
 6 files changed, 226 insertions(+), 18 deletions(-)
 create mode 100644 drivers/input/tests/touchscreen_test.c

-- 
2.56.0.385.gac671c819a-goog