Re: [PATCH v6 3/3] arm64: dts: qcom: Add Samsung Galaxy Book4 Edge DTS/DTSI

Konrad Dybcio
2026-03-26T11:33:59Z

On 3/25/26 7:30 PM, Maxim Storetvedt wrote:
>
>
> On 3/23/26 13:17, Konrad Dybcio wrote:
>> On 3/22/26 5:03 PM, Maxim Storetvedt wrote:
>>> Adds devicetrees for the 14-inch and 16-inch SKUs of the Samsung Galaxy Book4 Edge.
>>>
>>> These use a common dtsi derived from nodes that were able to work on Linux
>>> from the initial Galaxy Book4 Edge DTS by Marcus:
>>>
>>> Link: https://lore.kernel.org/all/p3mhtj2rp6y2ezuwpd2gu7dwx5cbckfu4s4pazcudi4j2wogtr@4yecb2bkeyms/
>>>
>>> combined with the ongoing patch for the Honor Magicbook Art 14, and its downstream by
>>> Valentin Manea, which shares device similarities:
>>
>> [...]
>>
>>> +&i2c8 {
>>> + clock-frequency = <400000>;
>>> +
>>> + status = "okay";
>>> +
>>> + touchscreen@5d {
>>> + compatible = "hid-over-i2c";
>>> + reg = <0x5d>;
>>> +
>>> + hid-descr-addr = <0x1>;
>>> + interrupts-extended = <&tlmm 34 IRQ_TYPE_LEVEL_LOW>;
>>> +
>>> + vdd-supply = <&vreg_misc_3p3>;
>>> + /* Lower power supply is not enoug to work. */
>>> + // vddl-supply = <&vreg_l15b_1p8>;
>>
>> How should we interpret that?
>>
>
> This was in the original patch, but using that same regulator appears to
> be enough to also get touchscreen working on the 16" book4e. That said,
> it still does not work on the 14". Something to revisit later...
>
>>
>> [...]
>>
>>> +&panel {
>>> + compatible = "samsung,atna40cu07", "samsung,atna33xc20";
>>
>> I think it'd make sense to move the compatible from 'common' to the
>> 16in DTS then too
>>
>>> + enable-gpios = <&pmc8380_3_gpios 4 GPIO_ACTIVE_HIGH>;
>>
>> this matches the common definition
>>
>>> + power-supply = <&vreg_edp_3p3>;
>>
>> ditto
>>
>>> + no-hpd;
>>
>> really??
>>
> One less thing to debug while previously attempting to work around the
> "illegal link rate" error, which turned out to be related to eDP 1.4
> (similar to the sp11). I've kept it as-is in case other SKUs attempt
> booting from this dts, such as the x1e80100 16" (as it might be getting
> a black screen using the current x1e84100 16" dts, though this is not
> fully tested).

So do the 80100 and 84100-equipped SKUs of the laptop come with different
displays?

Konrad