Re: [PATCH] arm64: dts: qcom: Add device tree for TUXEDO Elite 14 Gen1

[Konrad Dybcio]

On 6.03.2025 4:22 PM, Georg Gottleuber wrote:
> 
> 
> Am 06.03.25 um 13:50 schrieb Konrad Dybcio:
>> On 6.03.2025 1:25 PM, Georg Gottleuber wrote:
>>> Initial support for TUXEDO Elite 14 Gen1 based on Qualcomm Snapdragon X
>>> Elite SoC (X1E78100).
>>>
>>> Working:
>>> * Touchpad
>>> * Keyboard
>>> * eDP (no brightness control yet)
>>
>> in case your panel as a PWM backlight, you will need to set the PWM
>> output pin function explicitly, see x1e80100-microsoft-romulus.dtsi
> 
> Thank you, will check this.
> 
>>> * NVMe
>>> * USB Type-C port
>>> * WiFi (WiFi 7 untested)
>>> * GPU (software rendering)
>>>
>>> Not working:
>>> * GPU (WIP: firmware loading but output is jerky)
>>
>> Please tell us more
> 
> Oh, this is already an older thing: with kernel 6.10 loading
> gen70500_gmu.bin and gen70500_sqe.fw leading to partly slow and
> stuttering video output. Sometimes it rendered black edges / borders to
> KDE menus. Surely I did something wrong.
> 
> I have just tried to reproduce the same setup, but I couldn't get it to
> work just now. If you are interested, I can try it again with a
> new/current kernel. (which is preferred? linux? linux-next?)

linux-next/master is good

[...]

>>> +&gpu {
>>> +       status = "okay";
>>> +
>>> +       zap-shader {
>>> +               firmware-name = "qcom/a740_zap.mbn";
>>
>> Are the laptop's OEM key/security fuses not blown?
> 
> I'm not sure. How can I verify this?

If you took the ZAP file from linux-firmware and it loaded, they are
not blown.. meaning secure boot (not to be confused with UEFI secure
boot) is not there and anyone can replace the entire secure firmware
stack with what they please

Konrad