Re: [PATCH v4 2/2] arm64: dts: qcom: Add Xiaomi 12 Lite 5G (taoyao) DTS

[Stanislav Zaikin <zstaseg@gmail.com>]

On 3/21/26 8:36 AM, Val Packett wrote:
> Hello again :)
>
> On 3/5/26 6:39 AM, Stanislav Zaikin wrote:
>> Xiaomi 12 Lite 5G is a handset released in 2022
>> […]
>> +    touchscreen@0 {
>> +        compatible = "goodix,gt9916";
>> +        reg = <0>;
>> +
>> +        interrupts-extended = <&tlmm 81 IRQ_TYPE_LEVEL_LOW>;
>> +
>> +        reset-gpios = <&tlmm 105 GPIO_ACTIVE_LOW>;
>> +
>> +        avdd-supply = <&vreg_l7c_3p0>;
>> +        vddio-supply = <&vreg_l2c_1p8>;
>> +
>> +        spi-max-frequency = <5000000>;
>> +
>> +        touchscreen-size-x = <10800>;
>> +        touchscreen-size-y = <24000>;
>> […]
>
> I have noticed this previously and started wondering why the size was 
> 10x higher. Now with my own device (motorola-dubai) I actually found 
> out why…
>
> With the actual 1080x2400 size, the mm values reported by libinput are 
> 10x higher than what they should be, e.g. touching the bottom right 
> corner with libinput debug-events:
>
>  event3   TOUCH_MOTION              2  +1.493s  0 (0) 98.80/98.75 
> (1067.00/2370.00mm)
>
> (2.4 meter tall phone! :D) which was mooooostly "fine" except Phosh's 
> on-screen keyboard was accidentally detecting super-fast down swipes 
> as I was typing normally, and suddenly closing the keyboard as I was 
> typing.
>
I wonder why some other devices with gt9916 (there are a couple in 
mainline) that specifies 1080x2400. I don't think we can make this 
assumption unless there was a mistake already in those mainline dts.

Best regards,
Stanislav