Re: [PATCH v2] arm64: dts: qcom: x1e80100-medion-sprchrgd-14-s1: Add PWM backlight

[Ettore Chimenti]

Hi Sérgio,

On Mon Oct 26, 2026 at 7:26 PM CET, Sérgio Ferreira wrote:
> Hi Ettore,
>
> thanks for testing.
>
> No, i can not reproduce the value inversion. A brightness of 1 equals very dark while 4095 is maximum brightness. 0 is turning the screen off as expected.
>
> Here is my edid:
>
> ```
> edid-decode /sys/class/drm/card1-eDP-1/edid
> edid-decode (hex):
> ```
[...]

I have the same EDID so the panel is the same. I guess my unit has a
different circuit revision. 

>
> I can confirm the PWM period value mapping is a bit off for the top-end values, though I haven't noticed that in day-to-day use.

I agree, not a big deal indeed, I see other laptops (e.g.
x1p42100-lenovo-thinkbook-16.dts) using the same range.

Tested-by: Ettore Chimenti <ettore.chimenti@xxxxxxxxxx>

Thanks,
Ettore