[Mesa-dev] [PATCH] egl: Make EGL_EXT_device_drm optional.

[Emil Velikov]

On 2019/06/28, Mathias.Froehlich at gmx.net wrote:
> From: Mathias Fröhlich <mathias.froehlich at web.de>
> 
> Hi,
> 
> Ilia mentioned that there are drm rendernode only drivers out there.
> To support an egl device on those platforms, make the EGL_EXT_device_drm
> device extension optional.
> 
Currently DRM core mandates that primary node is available, even for GPU
only devices.

A while back, we had a chat with kernel people why we do so. IIRC the
conclustion was that existing userspace will just work, since it already
must handle cases when you unplug your only monitor.

I think Ilia was having a pretty reasonable assumption, that's why I did
before digging deeper, as opposed to saying there _are_ such cases.

HTH
Emil