[PATCH 3/5] drm/virtio: Return an error from connector dpms callback

[Takashi Iwai]

The virtio drm driver doesn't treat with DPMS, so we should return an
error from the connector dpms callback so that the fbcon can fall back
to the generic blank mode.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 drivers/gpu/drm/virtio/virtgpu_display.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/virtio/virtgpu_display.c b/drivers/gpu/drm/virtio/virtgpu_display.c
index d51bd4521f17..77d5bad49c5f 100644
--- a/drivers/gpu/drm/virtio/virtgpu_display.c
+++ b/drivers/gpu/drm/virtio/virtgpu_display.c
@@ -249,8 +249,15 @@ static void virtio_gpu_conn_destroy(struct drm_connector *connector)
 	kfree(virtio_gpu_output);
 }
 
+static int virtio_gpu_conn_dpms(struct drm_connector *connector, int mode)
+{
+	drm_atomic_helper_connector_dpms(connector, mode);
+	/* FIXME: return error to make fbcon generic blank working */
+	return -EINVAL;
+}
+
 static const struct drm_connector_funcs virtio_gpu_connector_funcs = {
-	.dpms = drm_atomic_helper_connector_dpms,
+	.dpms = virtio_gpu_conn_dpms,
 	.detect = virtio_gpu_conn_detect,
 	.fill_modes = drm_helper_probe_single_connector_modes,
 	.destroy = virtio_gpu_conn_destroy,
-- 
2.13.3