* OF THIS SOFTWARE.
*/
+#include <drm/drm_auth.h>
#include <drm/drm_connector.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder.h>
mutex_lock(&dev->mode_config.mutex);
if (out_resp->count_modes == 0) {
- connector->funcs->fill_modes(connector,
- dev->mode_config.max_width,
- dev->mode_config.max_height);
+ if (drm_is_current_master(file_priv))
+ connector->funcs->fill_modes(connector,
+ dev->mode_config.max_width,
+ dev->mode_config.max_height);
+ else
+ drm_dbg_kms(dev, "User-space requested a forced probe on [CONNECTOR:%d:%s] but is not the DRM master, demoting to read-only probe",
+ connector->base.id, connector->name);
}
out_resp->mm_width = connector->display_info.width_mm;
*
* **Force-probing a connector**
*
- * If the @count_modes field is set to zero, the kernel will perform a forced
- * probe on the connector to refresh the connector status, modes and EDID.
- * A forced-probe can be slow, might cause flickering and the ioctl will block.
+ * If the @count_modes field is set to zero and the DRM client is the current
+ * DRM master, the kernel will perform a forced probe on the connector to
+ * refresh the connector status, modes and EDID. A forced-probe can be slow,
+ * might cause flickering and the ioctl will block.
*
* User-space needs to force-probe connectors to ensure their metadata is
* up-to-date at startup and after receiving a hot-plug event. User-space