media: sun8i-a83t-mipi-csi2: Require both pads to be connected for streaming

[ Upstream commit 8985fc724ba89d9b00694304b3f9faf69f4073d0 ]

The bridge needs both its pads connected to be able to stream data.
Enforcing this is useful to produce an error when no sensor is
connected.

Fixes: 576d196c522b ("media: sunxi: Add support for the A83T MIPI CSI-2 controller")
Signed-off-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
index b032ec1..5e1c25d 100644 (file)
--- a/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
+++ b/drivers/media/platform/sunxi/sun8i-a83t-mipi-csi2/sun8i_a83t_mipi_csi2.c
@@ -557,8 +557,10 @@ sun8i_a83t_mipi_csi2_bridge_setup(struct sun8i_a83t_mipi_csi2_device *csi2_dev)
 
        /* Media Pads */
 
-       pads[SUN8I_A83T_MIPI_CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
-       pads[SUN8I_A83T_MIPI_CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
+       pads[SUN8I_A83T_MIPI_CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK |
+                                                   MEDIA_PAD_FL_MUST_CONNECT;
+       pads[SUN8I_A83T_MIPI_CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE |
+                                                     MEDIA_PAD_FL_MUST_CONNECT;
 
        ret = media_entity_pads_init(&subdev->entity,
                                     SUN8I_A83T_MIPI_CSI2_PAD_COUNT, pads);