backends/drm: support link-status
Userspace is expected to do a modeset and set link-status to good again, if link-status gets bad. This is needed to prevent some black screen situations. BUG: 448177
Userspace is expected to do a modeset and set link-status to good again, if link-status gets bad. This is needed to prevent some black screen situations. BUG: 448177
mentioned in commit 04b51655