Re: DRM/panel: Bringing Linux DRM Display Panel support in the modern age

Hi Linus,
________________________________________
From: Linus Walleij <[email protected]>
Sent: Thursday, June 4, 2026 1:39 AM
To: Dmitry Baryshkov <[email protected]>
Cc: Neil Armstrong <[email protected]>; [email protected] <[email protected]>; Douglas Anderson <[email protected]>; Maxime Ripard <[email protected]>; Gerecke, Jason <[email protected]>; Cheng, Ping <[email protected]>
Subject: Re: DRM/panel: Bringing Linux DRM Display Panel support in the modern age

> >> Do we have any indication that there is interest from the companies
> >> actually doing display controllers?
> >
> > They mainly speak to panel makers so I don't think they really care.
>
>> We have been going through this for all other classes of hardware. What
>> would be the selling point that would make panel vendor learn about the
>> upstream Linux process?
>
> The unique selling point would be a vendor that deliver professional
> equipment and which require full control over the display, i.e. full
> gamma correction for example.
>
> A typical such vendor would be Wacom.
> These tablets have excellent input device support in Linux thanks
> to Wacom working for years with the community, but most if not all
> of their devices these days are panels that you draw directly onto,
> so they are a panel and an input device.
>
> I don't know how much control they have over the deep
> aspects of the display today, I would expect at least factory
> calibration but that may be done with separate (non-linux)
> tooling. But certainly lifetime color correction is something
> I think they already support albeit possibly with custom tools?
>
> Cc to Jason & Ping to check if they have an interest in this.

Thank you for using Wacom as an example. We do care about our customers on Linux.

The reality is that display vendors do not share specs with us. We offer a solution [1] for our Linux customers based on the ddcutil project.

Cheers,
Ping

[1] https://github.com/linuxwacom/xf86-input-wacom/wiki/Adjusting-Display-Settings