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backend/drm: stop force-probing connectors 

After discussing with Pekka and Daniel on #dri-devel, we concluded [1]
that user-space shouldn't need to force-probe connectors. Force-probing
can take some time, so using drmModeGetConnectorCurrent can result in
faster start-up.

Users can manually trigger a force-probe if necessary:

    echo detect | sudo tee /sys/class/drm/card0-DP-1/status

Or just by running a tool like drm_info.

A similar change has been submitted to Weston [2].

[1]: https://lists.freedesktop.org/archives/dri-devel/2020-November/287728.html
[2]: https://gitlab.freedesktop.org/wayland/weston/-/issues/437
This commit is contained in:
Simon Ser 2020-11-18 11:57:08 +01:00
parent 154fe8696f
commit 713c1661b7
1 changed files with 2 additions and 2 deletions
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4
backend/drm/drm.c
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@ -1282,8 +1282,8 @@ void scan_drm_connectors(struct wlr_drm_backend *drm) {
struct wlr_drm_connector *new_outputs[res->count_connectors + 1];
for (int i = 0; i < res->count_connectors; ++i) {
drmModeConnector *drm_conn = drmModeGetConnector(drm->fd,
res->connectors[i]);
drmModeConnector *drm_conn =
drmModeGetConnectorCurrent(drm->fd, res->connectors[i]);
if (!drm_conn) {
wlr_log_errno(WLR_ERROR, "Failed to get DRM connector");
continue;