kmstest: Don't fail if setting crtc inactive and disabling the planes…

… fails

Many simple DRM devices (eg SPI) don't support disabling the primary
plane when the CRTC is enabled (which is different from the ACTIVE
flag from being cleared). This is enforced by the kernel in
drm_atomic_helper_check_crtc_primary_plane.

Do not exit if that commit fails.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>

utils/kmstest.cpp

@@ -835,7 +835,9 @@ static void set_crtcs_n_planes_atomic(Card& card, const vector<OutputInfo>& outp
 
 	// XXX DRM framework doesn't allow moving an active plane from one crtc to another.
 	// See drm_atomic.c::plane_switching_crtc().
-	// For the time being, disable all crtcs and planes here.
+	// For the time being, try and disable all crtcs and planes here.
+	// Do not check the return value as some simple displays don't support the crtc being
+	// enabled but the primary plane being disabled.
 
 	AtomicReq disable_req(card);
 
@@ -856,9 +858,7 @@ static void set_crtcs_n_planes_atomic(Card& card, const vector<OutputInfo>& outp
 					       { "CRTC_ID", 0 },
 				       });
 
-	r = disable_req.commit_sync(true);
-	if (r)
-		EXIT("Atomic commit failed when disabling: %d\n", r);
+	disable_req.commit_sync(true);
 
 	// Keep blobs here so that we keep ref to them until we have committed the req
 	vector<unique_ptr<Blob>> blobs;