From: Steve Longerbeam slongerbeam@gmail.com
commit 904371f90b2c0c749a5ab75478c129a4682ac3d8 upstream.
On i.MX6, the nearest upstream entity to the CSI can only be the CSI video muxes or the Synopsys DW MIPI CSI-2 receiver.
However the i.MX53 has no CSI video muxes or a MIPI CSI-2 receiver. So allow for the nearest upstream entity to the CSI to be something other than those.
Fixes: bf3cfaa712e5c ("media: staging/imx: get CSI bus type from nearest upstream entity")
Signed-off-by: Steve Longerbeam slongerbeam@gmail.com Cc: stable@vger.kernel.org Signed-off-by: Hans Verkuil hverkuil-cisco@xs4all.nl Signed-off-by: Mauro Carvalho Chehab mchehab+samsung@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/staging/media/imx/imx-media-csi.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)
--- a/drivers/staging/media/imx/imx-media-csi.c +++ b/drivers/staging/media/imx/imx-media-csi.c @@ -153,9 +153,10 @@ static inline bool requires_passthrough( /* * Parses the fwnode endpoint from the source pad of the entity * connected to this CSI. This will either be the entity directly - * upstream from the CSI-2 receiver, or directly upstream from the - * video mux. The endpoint is needed to determine the bus type and - * bus config coming into the CSI. + * upstream from the CSI-2 receiver, directly upstream from the + * video mux, or directly upstream from the CSI itself. The endpoint + * is needed to determine the bus type and bus config coming into + * the CSI. */ static int csi_get_upstream_endpoint(struct csi_priv *priv, struct v4l2_fwnode_endpoint *ep) @@ -168,7 +169,8 @@ static int csi_get_upstream_endpoint(str if (!priv->src_sd) return -EPIPE;
- src = &priv->src_sd->entity; + sd = priv->src_sd; + src = &sd->entity;
if (src->function == MEDIA_ENT_F_VID_MUX) { /* @@ -182,6 +184,14 @@ static int csi_get_upstream_endpoint(str src = &sd->entity; }
+ /* + * If the source is neither the video mux nor the CSI-2 receiver, + * get the source pad directly upstream from CSI itself. + */ + if (src->function != MEDIA_ENT_F_VID_MUX && + sd->grp_id != IMX_MEDIA_GRP_ID_CSI2) + src = &priv->sd.entity; + /* get source pad of entity directly upstream from src */ pad = imx_media_find_upstream_pad(priv->md, src, 0); if (IS_ERR(pad))