IMX6 error binding ipu on vdic

[Romain BEAL]

Hi,

Tested on gateworks ventana and variscite dart platform :
Unable to bind ipu1_csi0 on ipu1_vdic AND ipu2_csi1 on ipu2_vdic.

Steps to reproduce on ventana board :

$ media_ctl -p
- entity 53: ipu1_csi0 (3 pads, 4 links)
             type V4L2 subdev subtype Unknown flags 0
             device node name /dev/v4l-subdev8
        pad0: Sink
                [fmt:UYVY8_2X8/640x480@1/30 field:none 
colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range
                 crop.bounds:(0,0)/640x480
                 crop:(0,0)/640x480
                 compose.bounds:(0,0)/640x480
                 compose:(0,0)/640x480]
                <- "ipu1_csi0_mux":5 []
        pad1: Source
                [fmt:AYUV8_1X32/640x480@1/30 field:none 
colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                -> "ipu1_ic_prp":0 []
                -> "ipu1_vdic":0 []
        pad2: Source
                [fmt:AYUV8_1X32/640x480@1/30 field:none 
colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                -> "ipu1_csi0 capture":0 []


- entity 1: ipu1_vdic (3 pads, 3 links)
            type V4L2 subdev subtype Unknown flags 0
            device node name /dev/v4l-subdev0
        pad0: Sink
                [fmt:AYUV8_1X32/640x480@1/30 field:none 
colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                <- "ipu1_csi0":1 []
                <- "ipu1_csi1":1 []
        pad1: Sink
                [fmt:UYVY8_2X8/640x480@1/30 field:none 
colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
        pad2: Source
                [fmt:AYUV8_1X32/640x480@1/60 field:none 
colorspace:smpte170m xfer:709 ycbcr:601 quantization:lim-range]
                -> "ipu1_ic_prp":0 []



$ media-ctl -l "'ipu1_csi0':1 -> 'ipu1_vdic':0[1]" -v
Opening media device /dev/media0
Enumerating entities
Found 19 entities
Enumerating pads and links
Setting up link 53:1 -> 1:0 [1]
Opening media device /dev/media0
media_setup_link: Unable to setup link (Invalid argument)

 'ipu1_csi0':1 -> 'ipu1_vdic':0[1]
                                 ^
Unable to parse link: Invalid argument (22)


Others links works great.
The ipu -> vdic bind worked on 4.14

Is it a kernel bug?

---
Romain BEAL