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

[Val Packett <val@packett.cool>]

On 3/23/26 05:04, Stanislav Zaikin wrote:
> 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

Not sure what you meant there..

I have not seen other devices do the 10800/24000 thing. Please set 
1080/2400 (actual size not 10x larger).

~val