Hi,
On 07-06-18 12:07, Hans de Goede wrote:
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 commits documents 2 new touchscreen properties for communicating
the minimum reported values to the OS: touchscreen-min-x and -min-y.
This commit also drop the (in pixels) comment from the documentation
of the touchscreen-size-x and touchscreen-size-y properties. This comment
suggests 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.
Cc: robh@xxxxxxxxxx
Cc: devicetree@xxxxxxxxxxxxxxx
Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
Dmitry, what is the status of this series ? This patch has been acked by
Rob, so I believe both patches are ready for merging now ?
Regards,
Hans
---
Changes in v2:
-Split out from the patch implementing support for the properties
-Describe the changes to the touchscreen-size-x / -size-y description in
the commit message
---
.../devicetree/bindings/input/touchscreen/touchscreen.txt | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
index 537643e86f61..8aff9551259f 100644
--- a/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
+++ b/Documentation/devicetree/bindings/input/touchscreen/touchscreen.txt
@@ -1,10 +1,12 @@
General Touchscreen Properties:
Optional properties for Touchscreens:
+ - touchscreen-min-x : minimum x coordinate reported (0 if not set)
+ - touchscreen-min-y : minimum y coordinate reported (0 if not set)
- touchscreen-size-x : horizontal resolution of touchscreen
- (in pixels)
+ (maximum x coordinate reported + 1)
- touchscreen-size-y : vertical resolution of touchscreen
- (in pixels)
+ (maximum y coordinate reported + 1)
- touchscreen-max-pressure : maximum reported pressure (arbitrary range
dependent on the controller)
- touchscreen-fuzz-x : horizontal noise value of the absolute input
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