GIGA Display Shield: How to capture touch events?

[KurtE]

I am trying to understand how to have an Arduino sketch be able to use the touch events generated
by the GIGA Display shield.

If I look at the overlay file, that is defined for the giga in zephyr:
D:\github\zephyr\boards\shields\giga_display_shield\boards\arduino_giga_r1_m7.overlay

It has:

&i2c4 {
	pinctrl-0 = <&i2c4_scl_pb6 &i2c4_sda_ph12>;
	pinctrl-names = "default";
	clock-frequency = <I2C_BITRATE_FAST>;
	status = "okay";

	gt911: gt911@5d {
		status = "okay";
		compatible = "goodix,gt911";
		reg = <0x5d>;
		alt-addr = <0x14>;
		reset-gpios = <&gpioi 2 GPIO_ACTIVE_LOW>;
		irq-gpios = <&gpioi 1 GPIO_ACTIVE_HIGH>;
	};
};

So it is using the gt911 input ... It has status of okay so it starts up. with IRQ on GPIO I1...
And it is probably using the code in zephyr\drivers\input\input_gt911.c

I found the zephyr example: samples\subsys\input\draw_touch_events, which I was curious if it would
build and run... So far did not build.

D:/zephyrproject/zephyr/drivers/display/display_stm32_ltdc.c:422:25: error: 'CONFIG_VIDEO_BUFFER_SMH_ATTRIBUTE' undeclared (first use in this function)
  422 |                         CONFIG_VIDEO_BUFFER_SMH_ATTRIBUTE,
      |                         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
D:/zephyrproject/zephyr/drivers/display/display_stm32_ltdc.c:422:25: note: each undeclared identifier is reported only once for each function it appears in
[41/48] Linking C static library zephyr\kernel\libkernel.a

Thought I would try doing the same thing in a sketch, however I don't think this will work.

static void touch_event_callback(struct input_event *evt, void *user_data)
{
	if (evt->code == INPUT_ABS_X) {
		touch_point.x = evt->value;
	}
	if (evt->code == INPUT_ABS_Y) {
		touch_point.y = evt->value;
	}
	if (evt->code == INPUT_BTN_TOUCH) {
		touch_point.pressed = evt->value;
	}
	if (evt->sync) {
		k_sem_give(&sync);
	}
}
INPUT_CALLBACK_DEFINE(touch_dev, touch_event_callback, NULL);

As I don't believe the INPUT_CALLBACK_DEFINE will work in a sketch?

Wondering best way to handle this?

Potentially, maybe define some callback within the ArduinoCore-zephyr code space.
Like maybe in loader\fixups.c ?

Turn off the interrupt? And try to poll it?

Suggestions?

[KurtE]

Quick note:
The example sketch: ~/zephyrproject/zephyr/samples/subsys/input/input_dump
does build and run.
From the monitor window:

I: input event: dev=gt911@5d             type= 3 code=  0 value=373
I: input event: dev=gt911@5d             type= 3 code=  1 value=444
I: input event: dev=gt911@5d         SYN type= 1 code=330 value=1
I: input event: dev=gt911@5d             type= 3 code=  0 value=373
I: input event: dev=gt911@5d             type= 3 code=  1 value=444
I: input event: dev=gt911@5d         SYN type= 1 code=330 value=1
I: input event: dev=gt911@5d             type= 3 code=  0 value=373
I: input event: dev=gt911@5d             type= 3 code=  1 value=444
I: input event: dev=gt911@5d         SYN type= 1 code=330 value=1
I: input event: dev=gt911@5d             type= 3 code=  0 value=373
I: input event: dev=gt911@5d             type= 3 code=  1 value=444

Note: if you hold your finger down at all, you will see a lot of messages like:

I: input event: dev=gt911@5d             type= 3 code=  0 value=368
I: input event: dev=gt911@5d             type= 3 code=  1 value=424
I: input event: dev=gt911@5d         SYN type= 1 code=330 value=1
I: input event: dev=gt911@5d             type= 3 coW: Event dropped, queue full, not blocking in syswq.
de=  0 value=368
I: input event: dev=gt911@5d             type= 3 codW: Event dropped, queue full, not blocking in syswq.
W: Event dropped, queue full, not blocking in syswq.
e=  1 value=424W: Event dropped, queue full, not blocking in syswq.
W: Event dropped, queue full, not blocking in syswq.
W: Event dropped, queue full, not blocking in syswq.