LP-11 Timeout on RZ/G2 with ov5640

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I am trying to use an OV5640 camera sensor that I've used on both an
i.MX6Q and an i.MX8M Mini (with good success) on an RZ/G2[MNH] board
connected to the 2-lane CSI interface.

I can get the media-ctl to show the routings, and sometimes I can get
streaming.  Often, I get a timeout:

     rcar-csi2 fea80000.csi2: Timeout waiting for LP-11 state

Looking at the various mailing list e-mails for the LP-11, it's
unclear to me if the timeout is caused by the sensor not doing
something correctly or the CSI2 misbehaving.

I was hoping someone might have some suggestions of things I can try.

Thank you,

adam



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