When the upstream endpoint is neither a mux nor a CSI2 module, just get
the source pad directly upstream from the CSI.

Fixes: 05f634040c0d ("media: staging/imx7: add imx7 CSI subdev driver")
Reported-by: Sebastien Szymanski <sebastien.szyman...@armadeus.com>
Signed-off-by: Rui Miguel Silva <rui.si...@linaro.org>
---
 drivers/staging/media/imx/imx7-media-csi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/staging/media/imx/imx7-media-csi.c 
b/drivers/staging/media/imx/imx7-media-csi.c
index 9101566f3f67..8979ee0c8202 100644
--- a/drivers/staging/media/imx/imx7-media-csi.c
+++ b/drivers/staging/media/imx/imx7-media-csi.c
@@ -442,6 +442,14 @@ static int imx7_csi_get_upstream_endpoint(struct imx7_csi 
*csi,
 
        src = &csi->src_sd->entity;
 
+       /*
+        * if the source in neither a mux or csi2 get the one directly upstream
+        * from this csi
+        */
+       if (src->function != MEDIA_ENT_F_VID_IF_BRIDGE &&
+               src->function != MEDIA_ENT_F_VID_MUX)
+               src = &csi->sd.entity;
+
 skip_video_mux:
        /* get source pad of entity directly upstream from src */
        pad = imx_media_pipeline_pad(src, 0, 0, true);
-- 
2.22.0

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