[PATCH 1/3] drm: add connector info/property for non-std displays

[Daniel Stone]

Hi,

On 16 October 2017 at 06:29, Dave Airlie <airlied at gmail.com> wrote:
> This adds the infrastructure needed to quirk displays
> using edid and to mark them a non-standard.
>
> A non-standard display is one which doesn't work like
> a normal rectangular monitor or requires some transformation
> of the output by the rendering process to make sense.
>
> This is meant to cover head mounted devices like HTC Vive.

Why not add a client cap which hides 'non-standard' displays
completely from non-aware clients? That way you can keep the connected
status as is, and clients either never see the HMD or will be able to
check the property.

Either way, I'm still not convinced doing this in the kernel makes any
sense. Seems like we'll need to keep doing it forever for every HMD
once we start now. Why not drop the in-kernel database, and go with a
userspace-side table: we already _have_ udev's hwdb, there's already a
decent enough sketch of an EDID database we could share between
Mutter/Weston/Xorg/..., and it's easier to deal with, distribute, and
hack. We need the shared EDID library anyway in order to deal with the
quirk tables replicated between the kernel/Xorg currently, so that's
going to happen pretty soon regardless of whether or not the kernel
gets its own database.

Cheers,
Daniel