[PATCH] drm/vkms: detect modes during output initialization

[Simon Ser]

On Monday, November 30, 2020 2:03 AM, Leandro Ribeiro <leandro.ribeiro at collabora.com> wrote:

> In userspace we can use drmGetConnector() or drmGetConnectorCurrent() in
> order to retrieve connector information. The difference between both is
> that the former retrieves the complete set of modes and encoders
> associated with the connector, while the latter only retrieves the
> currently known set of modes and encoders - but is much faster.
>
> This performance improvement is the reason why userspace applications
> may prefer to use drmGetConnectorCurrent() when they need to retrieve
> information from a device.

We discussed with Daniel Vetter and it turns out user-space should
always use drmGetConnector(). See [1].

[1]: https://lists.freedesktop.org/archives/dri-devel/2020-November/289506.html