lease-manager: Check that DRM device is viable for modesetting

Don't try to create leases from any DRM device that doesn't have
at least one connector, CRTC, and encoder.  This allows any such
devices to be skipped when looking for a viable device when one
is not provided on the command line.

Bug-AGL: SPEC-4573

Signed-off-by: Damian Hobson-Garcia <dhobsong@igel.co.jp>
Change-Id: Ia8cf27127e4d61c13c6d8dfc633282776da74060

diff --git a/drm-lease-manager/lease-manager.c b/drm-lease-manager/lease-manager.c
index 885ca29..51a4613 100644 (file)
--- a/drm-lease-manager/lease-manager.c
+++ b/drm-lease-manager/lease-manager.c
@@ -532,6 +532,13 @@ static struct lm *drm_device_get_resources(const char *device)
                goto err;
        }
 
+       if (lm->drm_resource->count_connectors <= 0 ||
+               lm->drm_resource->count_crtcs <= 0 ||
+               lm->drm_resource->count_encoders <= 0) {
+               DEBUG_LOG("Insufficient DRM resources on device(%s)\n", device);
+               goto err;
+       }
+
        lm->drm_plane_resource = drmModeGetPlaneResources(lm->drm_fd);
        if (!lm->drm_plane_resource) {
                DEBUG_LOG("drmModeGetPlaneResources failed: %s\n",