Re: [PATCH 4/4] Input: goodix - Support interchanging x and y coordinates in hardware
flat view
From: Rob Herring <hidden>
Date: 2016-10-26 23:18:22
Also in:
linux-input, lkml
On Thu, Oct 20, 2016 at 02:59:17PM -0500, Franklin S Cooper Jr wrote:
On systems with a fixed display/touchscreen orientation it is important to pass in the "correct" x and y coordinates based on the orientation. Currently, to support landscape and portrait touchscreen-swapped-x-y simply does the following: Assuming touchscreen is as follows: X: 1280 Y:800 programmed in touchscreen controller and also interchange bit cleared. Assuming ts mounted in portrait mode. 1280 (X) ------ | | | | 800 (Y) | | | | ------ 800 (Y) ------ | | | | 1280 (X) | | | | ------ However, the above isn't really what we want especially in distros that assumes a fixed orientation. In this case what we really want is to interchange the x and y coordinates so the Y coordinate can return a max value of 1280 and X can return a max value of 800. 800 (X) ------ | | | | 1280 (Y) | | | | ------ Since the driver is limited to the value reported by the touchscreen controller this issue can't be fixed purely in the driver. Therefore, add a new DT property that supports interchanging X and Y coordinates internally within the hardware.
I'm not sure I follow why existing properties don't cover this.
quoted hunk ↗ jump to hunk
Signed-off-by: Franklin S Cooper Jr <redacted> --- .../devicetree/bindings/input/touchscreen/goodix.txt | 2 ++ drivers/input/touchscreen/goodix.c | 13 +++++++++++++ 2 files changed, 15 insertions(+)diff --git a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt index ebc7cb7..b8be2ab 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/goodix.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/goodix.txt@@ -25,6 +25,8 @@ Optional properties: - touchscreen-inverted-y : Y axis is inverted (boolean) - touchscreen-swapped-x-y : X and Y axis are swapped (boolean) (swapping is done after inverting the axis) + - touchscreen-inter-x-y : X and Y maximum values programmed in the device + are interchanged internally in hardware. (boolean)
Minimally this should be vendor specific and have a vendor prefix I think. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html