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media: imx: csi: Allow unknown nearest upstream entities

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commit 904371f90b 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: bf3cfaa712 ("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>
This commit is contained in:
Steve Longerbeam
2019-02-20 18:53:29 -05:00
committed by Greg Kroah-Hartman
parent 77e1787081
commit ef12f5b54d
1 changed files with 14 additions and 4 deletions
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18
drivers/staging/media/imx/imx-media-csi.c
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@@ -153,9 +153,10 @@ static inline bool requires_passthrough(struct v4l2_fwnode_endpoint *ep,
/*
* 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(struct csi_priv *priv,
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(struct csi_priv *priv,
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))