MT9M131 on I.MX6DL CSI color issue

Florian Boor
2018-01-12T00:16:06Z

Hello all,

I have a Phytec VM-009 camera based on MT9M131 connected to CSI0 of a I.MX6DL
based board running mainline 4.13.0 + custom devicetree. Its using the parallel
interface, 8 bit bus width on pins 12 to 19.

Basically it works pretty well apart from the really strange colors. I guess its
some YUV vs. RGB issue or similar. Here [1] is an example generated with the
following command.

gst-launch v4l2src device=/dev/video4 num-buffers=1 ! jpegenc ! filesink
location=capture1.jpeg

Apart from the colors everything is fine.
I'm pretty sure I have not seen such an effect before - what might be wrong here?

The current setup looks like this:

IF=UYVY2X8
GEOM="1280x1024"
media-ctl -l "'mt9m111 2-0048':0 -> 'ipu1_csi0_mux':4[1]"
media-ctl -l "'ipu1_csi0_mux':5 -> 'ipu1_csi0':0[1]"
media-ctl -l "'ipu1_csi0':2 -> 'ipu1_csi0 capture':0[1]"

media-ctl -d /dev/media0 -v -V "'ipu1_csi0':2 [fmt:${IF}/${GEOM} field:none]"
media-ctl -d /dev/media0 -v -V "'ipu1_csi0 capture':0 [fmt:${IF}/${GEOM}
field:none]"
media-ctl -d /dev/media0 -v -V "'ipu1_csi0_mux':4 [fmt:${IF}/${GEOM} field: none]"
media-ctl -d /dev/media0 -v -V "'ipu1_csi0_mux':5 [fmt:${IF}/${GEOM} field: none]"
media-ctl -d /dev/media0 -v -V "'mt9m111 2-0048':0 [fmt:${IF}/${GEOM} field: none]"

Greetings

Florian

[1] http://www.kernelconcepts.de/~florian/capture1.jpeg

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The dream of yesterday Florian Boor
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and the reality of tomorrow. Fax: +49 271-338857-29