media: imx: csi: Allow unknown nearest upstream entities
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: bf3cfaa7 ("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>
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