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    SubjectRe: [PATCH v5 00/11] Add support for BCM2835 camera interface (unicam)
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    Hi Stefan,

    On 16/02/2022 21:57, Stefan Wahren wrote:
    > Hi Jean-Michel,
    >
    > Am 08.02.22 um 16:50 schrieb Jean-Michel Hautbois:
    >> Hello !
    >>
    >> ...
    >>
    >> In order to properly configure the media pipeline, it is needed to call
    >> the usual ioctls, and configure routing in order to send the embedded
    >> data from the sensor to the "unicam-embedded" device node :
    >>
    >> ```
    >> media=0
    >> media-ctl -d${media} -l "'imx219 2-0010':0->'unicam-subdev':0 [1]"
    >> media-ctl -d${media} -l "'unicam-subdev':1->'unicam-image':0 [1]"
    >> media-ctl -d${media} -v -R "'unicam-subdev' [0/0->1/0[1],0/1->2/0[1]]"
    >> media-ctl -d${media} -V "'imx219 2-0010':0/0 [fmt:SRGGB10_1X10/3280x2464 field:none]"
    >> v4l2-ctl -d0 --set-fmt-video width=3280,height=2464,pixelformat='pRAA',field=none
    >> media-ctl -d${media} -v -V "'imx219 2-0010':0/1 [fmt:METADATA_8/16384x1 field:none]"
    >> media-ctl -d${media} -p
    >> ```
    >
    > i tried to test the unicam driver on a Raspberry Pi 4 with the imx219
    > camera (based on 5.17-rc4). The unicam & imx219 driver probes and
    > /dev/video0 is created.
    >
    > If a execute the first media-ctl command, it complains with invalid
    > argument 22. Is there a more fool-proof variant to configure this (a
    > script or something else)? I never used the unicam driver before.
    >
    > Here is the output of
    >
    > $ mediactl -d0 -p
    >

    Based on your output, I suppose the issue is the naming of the imx219
    media entity ('imx219 2-0010' vs 'imx219 5-0010').
    You could add a '-v' in the line to help you I suppose.

    A more bullet-proof version of the commands is certainly doable, not
    sure how though as I would not like to rewrite a libcamera-like command ;-).

    > Media controller API version 5.17.0
    >
    > Media device information
    > ------------------------
    > driver          unicam
    > model           unicam
    > serial
    > bus info        platform:fe801000.csi
    > hw revision     0x0
    > driver version  5.17.0
    >
    > Device topology
    > - entity 1: unicam-subdev (3 pads, 3 links, 2 routes)
    >             type V4L2 subdev subtype Unknown flags 0
    >             device node name /dev/v4l-subdev0
    >     routes:
    >         0/0 -> 1/0 [ACTIVE]
    >         0/1 -> 2/0 [ACTIVE]
    >     pad0: Sink
    >         [stream:0 fmt:unknown/0x0]
    >         [stream:1 fmt:unknown/0x0]
    >         <- "imx219 5-0010":0 [ENABLED,IMMUTABLE]
    >     pad1: Source
    >         [stream:0 fmt:unknown/0x0]
    >         -> "unicam-image":0 [ENABLED,IMMUTABLE]
    >     pad2: Source
    >         [stream:0 fmt:unknown/0x0]
    >         -> "unicam-embedded":0 [ENABLED,IMMUTABLE]
    >
    > - entity 5: imx219 5-0010 (1 pad, 1 link, 2 routes)
    >             type V4L2 subdev subtype Sensor flags 0
    >             device node name /dev/v4l-subdev1
    >     routes:
    >         0/0 -> 0/0 [ACTIVE, IMMUTABLE, SOURCE]
    >         0/0 -> 0/1 [ACTIVE, SOURCE]
    >     pad0: Source
    >         [stream:0 fmt:SRGGB10_1X10/3280x2464 field:none colorspace:raw
    >          crop.bounds:(8,8)/3280x2464
    >          crop:(8,8)/3280x2464]
    >         [stream:1 fmt:METADATA_8/16384x1 field:none
    >          crop.bounds:(8,8)/3280x2464
    >          crop:(8,8)/3280x2464]
    >         -> "unicam-subdev":0 [ENABLED,IMMUTABLE]
    >
    > - entity 9: unicam-image (1 pad, 1 link, 0 route)
    >             type Node subtype V4L flags 1
    >             device node name /dev/video0
    >     pad0: Sink
    >         <- "unicam-subdev":1 [ENABLED,IMMUTABLE]
    >
    > - entity 15: unicam-embedded (1 pad, 1 link, 0 route)
    >              type Node subtype V4L flags 0
    >              device node name /dev/video1
    >     pad0: Sink
    >         <- "unicam-subdev":2 [ENABLED,IMMUTABLE]
    >

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