Revert "drm: hide unregistered connectors from GETCONNECTOR IOCTL"

This reverts commit 981f09295687f856d5345e19c7084aca481c1395.

It turns out this causes logically active but disconnected DP MST
connectors to disappear from the KMS resources list, and Mutter
then assumes the connector is already disabled. Later on Mutter tries
to re-use the same CRTC but fails since on the kernel side it's still
tied to the disconnected DP MST connector.

Signed-off-by: Simon Ser <contact@emersion.fr>
Tested-by: Jonas Ådahl <jadahl@redhat.com>
Reviewed-by: Lyude Paul <lyude@redhat.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: https://patchwork.freedesktop.org/patch/msgid/20221017153150.60675-1-contact@emersion.fr

diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c
index 939d621c9ad4bf845391ad03c90d2fef9b307228..688c8afe0bf174af2430659b5c3b49ef825c0dc3 100644 (file)
--- a/drivers/gpu/drm/drm_mode_config.c
+++ b/drivers/gpu/drm/drm_mode_config.c
@@ -151,9 +151,6 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
        count = 0;
        connector_id = u64_to_user_ptr(card_res->connector_id_ptr);
        drm_for_each_connector_iter(connector, &conn_iter) {
-               if (connector->registration_state != DRM_CONNECTOR_REGISTERED)
-                       continue;
-
                /* only expose writeback connectors if userspace understands them */
                if (!file_priv->writeback_connectors &&
                    (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK))