Re: [PATCH 1/4] media: imx.rst: Fix the MIPI CSI-2 virtual channel

[Steve Longerbeam <slongerbeam@gmail.com>]

On 4/8/20 10:24 AM, Fabio Estevam wrote:
> Hi Steve,
>
> On Wed, Apr 8, 2020 at 1:35 PM Steve Longerbeam <slongerbeam@gmail.com> wrote:
>
>> change to:
>>
>> media-ctl -V "'ipu1_ic_prpenc':1 [fmt:ARGB8888_1X32/800x600]"
> If I make this change I get:
>
> # v4l2-ctl --stream-mmap -d /dev/video1
> [  501.143012] ipu1_ic_prpenc: capture format not valid
>                  VIDIOC_STREAMON returned -1 (Invalid argument)
>
> Going back to the original example:
>
> #  media-ctl -V "'ipu1_ic_prpenc':1 [fmt:AYUV32/640x480]"
> # v4l2-ctl --stream-mmap -d /dev/video1
> <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< 30.03 fps
>
> Changing only the resolution:
>
> #  media-ctl -V "'ipu1_ic_prpenc':1 [fmt:AYUV32/800x600]"
> # v4l2-ctl --stream-mmap -d /dev/video1
> [  658.358246] ipu1_ic_prpenc: capture format not valid
>                  VIDIOC_STREAMON returned -1 (Invalid argument)
>
> Any ideas?

You have to set a format at the capture interface as the last step 
before streaming can start:

# v4l2-ctl -d /dev/video1 --set-fmt-video=pixelformat=RGB3


or whatever RGB format is supported. It's enough to sinmply set one parameter, such as width or height or pixelformat. The driver will propagate the reset from the source subdev ipu1_ic_prpenc.

The capture interface used to be automatically propagated from the source subdev, but now it must be done by userland.

Steve

>
> These are the lines I am currently using as per your feedback:
>
>     # Setup links
>     media-ctl -l "'ov5640 1-003c':0 -> 'imx6-mipi-csi2':0[1]"
>     media-ctl -l "'imx6-mipi-csi2':1 -> 'ipu1_csi0_mux':0[1]"
>     media-ctl -l "'ipu1_csi0_mux':2 -> 'ipu1_csi0':0[1]"
>     media-ctl -l "'ipu1_csi0':1 -> 'ipu1_ic_prp':0[1]"
>     media-ctl -l "'ipu1_ic_prp':1 -> 'ipu1_ic_prpenc':0[1]"
>     media-ctl -l "'ipu1_ic_prpenc':1 -> 'ipu1_ic_prpenc capture':0[1]"
>     # Configure pads
>     media-ctl -V "'ov5640 1-003c':0 [fmt:UYVY2X8/640x480]"
>     media-ctl -V "'imx6-mipi-csi2':1 [fmt:UYVY2X8/640x480]"
>     media-ctl -V "'ipu1_csi0_mux':2 [fmt:UYVY2X8/640x480]"
>     media-ctl -V "'ipu1_csi0':1 [fmt:AYUV32/640x480]"
>     media-ctl -V "'ipu1_ic_prp':1 [fmt:AYUV32/640x480]"
>     media-ctl -V "'ipu1_ic_prpenc':1 [fmt:ARGB8888_1X32/800x600]"
>
> Thanks,
>
> Fabio Estevam
>
>     # Setup links
>     media-ctl -l "'ov5640 1-003c':0 -> 'imx6-mipi-csi2':0[1]"
>     media-ctl -l "'imx6-mipi-csi2':1 -> 'ipu1_csi0_mux':0[1]"
>     media-ctl -l "'ipu1_csi0_mux':2 -> 'ipu1_csi0':0[1]"
>     media-ctl -l "'ipu1_csi0':1 -> 'ipu1_ic_prp':0[1]"
>     media-ctl -l "'ipu1_ic_prp':1 -> 'ipu1_ic_prpenc':0[1]"
>     media-ctl -l "'ipu1_ic_prpenc':1 -> 'ipu1_ic_prpenc capture':0[1]"
>     # Configure pads
>     media-ctl -V "'ov5640 1-003c':0 [fmt:UYVY2X8/640x480]"
>     media-ctl -V "'imx6-mipi-csi2':1 [fmt:UYVY2X8/640x480]"
>     media-ctl -V "'ipu1_csi0_mux':2 [fmt:UYVY2X8/640x480]"
>     media-ctl -V "'ipu1_csi0':1 [fmt:AYUV32/640x480]"
>     media-ctl -V "'ipu1_ic_prp':1 [fmt:AYUV32/640x480]"
>     media-ctl -V "'ipu1_ic_prpenc':1 [fmt:ARGB8888_1X32/800x600]"