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

[Stanislav Zaikin <zstaseg@gmail.com>]

On 3/23/26 9:49 PM, Val Packett wrote:
>
> 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 meant the existing dts files that use gt9916:

sm8550-qrd.dts

sm8650-qrd.dts

sm8650-hdk-display-card.dtso

All of those specify 1080x2400. That means either those boards weren't 
tested (by physically tapping the touchscreen at least) or that there's 
something else.

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

Best regards,
Stanislav